Easel 5000 Operator`s Manual
Contents
1. 6 Volt battery supply for LED Light 11 CLASS 2 POWER UNITS Wes J ia Tj E mAH Mee 4G L UDEL PA 127 A INPUT AC Life GHJ RPU DOFT JPA POLARITY ie DATE Jo MAR Tog MEDE B Cra Dimming Knob located on underside of LED Light On Off Switch 12 Friction Hinge Canvas Sizes L Brakes for Adjustment 13 TABLE OF CONTENTS Introduction Maintenance Technical Description Trouble Shooting References About the Easel Easel Assembly Instructions Easel Use LED Light Easel Frame Adjustment Attachment LED Light Power Source LEDs Circuit PCB Friction Hinge Plastic Enclosure Material Easel Base Easel Extension Arms Canvas Holder Canvas Clamp Mechanical Analysis 14 15 17 27 27 31 32 35 46 46 INTRODUCTION About the easel The Easel 5000 is an adjustable easel designed for use by an artist with physical limitations The easel is made to adjust to a variety of positions an artist would need when painting It is fully mechanical with double locking joints to ensure sturdiness and safety It is designed to attach to the tray ofa wheel chair for the artist s use The easel design is broken up into four major components These components include an LED light source a canvas holder an easel extension and a base The LED light source has a light intensity dimming adjustment an easy to use On Off switch and an adjusta2. BURNS Do not disassemble the canvas holder as the frame contains electrical wiring Warning Abuse of Velcro on Battery compartment can cause loosening of battery Avoid abuse of battery compartment and Velcro Warning Canvas holder could fall on user Be sure to tightened both locking handles at one joint before letting go of the easel after adjustments have been made Only loosen one L brake at a time Only let go of the easel after both sets of L brakes have been tightened securely Make sure both L brakes are tightened securely after adjustment is finished When adjusting the canvas holder make sure to adjust one L brake at a time to avoid loosing control of the easel Warning Canvas can falls on user Check to make sure that the canvas clamp rubber stripping contacts as much of the canvas frame as possible Check that the canvas clamp is securely fastened and that the canvas clamp locking handles have been tightened Do not overload canvas holder Do not place materials larger than 9 X36 or 20 X24 into the easel frame Do not attempt to adjust the canvas clamping mechanism while the canvas holder is over the artist Do not attempt to adjust the canvas clamping mechanism while the canvas holder is inclined forward Make sure to retract the easel extension before adjusting canvas clamp Use slots in the canvas holder when ever possible when mounting a canvas Avoid Can
3. Friction Hinge This friction positioning hinge produced by Reell Incorporated operates via a frictional device placed in the articulation between the two hinge pieces The Model PHC hinge is designed to provide constant torque throughout its full range of motion The hinge is capable of handling 3 9 lb in of torque which is more than ample for the small LED enclosure Also it is capable of more than 10 000 cycles of use at maximum load a wN i n T l wW F F i j Fai Ni a N w y f a y u wa S a Fa a Friction Hinge Side and Front View Reell com Plastic Enclosure This prefabricated plastic enclosure by Hammond Manufacturing offered a perfect option for housing the LED lighting unit The enclosure is made of flame retardant UL94 plastic and has bras inserts in the corners for securing the box closed It was a good size offered easy mounting and was easy to machine for the features of the LED circuit board Top View of LED Enclosure Hammondmfg com 54 A a he Side View of LED Enclosure Hammondmfg com The Easel Frame The Easel 5000 is meant to assist painters with the positioning of a canvas or other painting surface Factors taken into consideration when designing the easel were aesthetics material strength and ease of adjustment Each item played a critical role in the design of this project Material After evaluating numerous materials including wood aluminum and steel it was decided that
4. LED Spec Value Product ID L1 O W5STH15 1 Angle 15 Package omm Color Peak Wavelength in nm 18000mcd typ Luminous Intensity Max Forward Current Max Forward Current Pulse Forward Voltage Max Reverse Voltage Power Dissipation Operating Temp Soldering Temp Max Reverse 47 20mA 30mA 100mA for lt 10ms duty lt 1 10 3 6V typ 4 0V max 20mA 5V 120mW 30 to 85 C 265 C for 10 secs 50uA 5V Current LED Polarity side View Top View i ON JT LED Schematic Zoom of Branch of LED Circuit The above circuit shows two branches of the eight branches of the LED circuit This shows the combination of LEDs in parallel and series This combination of two in series and eight branches in parallel for a total of 16 LEDs let the circuit operate to maximum capacity This let the most LEDs run on the smallest power supply the appropriate amount of current to each of the LEDs allowing them to burn at maximum capacity The NPN switching transistor at the end of each branch is to ensure that the appropriate amount 48 of current is always being provided and the maximum capacity of the LEDs is not surpassed This is due to the oscillating square wave provided by the LM555 that this problem can arise Circuit The following is the circuit diagram for the LED light of the product It includes resistances LEDs a power source transistors capacitors an LM555 chip and a potentiomet
5. extrusion 25 2525 extrusion Pivot Bracket Assembly 4 hole inside corner brackets BHSCS w Economy T nut BHSCS w Economy T nut for 4 hole inside corner brackets 25 2525 end caps 25 2525 extrusion 25 2525 extrusion 25 2525 extrusion BHSCS w Economy T nut 25 2525 end caps Rubber stripping 25 2525 extrusion 25 2525 extrusion Unibearing for 25 2525 L brake assemblies End fastener and stainless steel screw 25 2525 end cap rubber stripping LED system PCB NA NA NA NA NA NA 12 25 21 21 21 21 304 8 127 635 033 4 203 2 033 4 0 375 033 4 50 8 O O 533 4 0 375 44 18 25 2525 29 2525 25 4051 25 4113 75 3404 75 3404 29 2015 75 3404 295 2015 29 2525 29 2525 25 6760 25 6850 25 3682 295 2015 2 438 1 016 3 850 0 420 0 420 1 000 5 080 4 267 1 626 0 420 1 000 4 267 0 406 9 050 1 500 1 000 4 88 4 06 100 00 7 70 7 56 3 36 8 00 15 24 4 27 1 63 2 52 8 00 0 00 0 00 4 27 0 81 50 00 18 10 3 00 4 00 0 00 99 87 Mechanical Section totals Super Bright LED 20 Potentiometer 1 Potentiometer Knob l Battery 9 6V 1700 mAh 1 Battery connector 1 1 51 5 13 20 95 2 99 36 250 1 51 5 13 20 95 2 99 505 12 Length Length Width of
6. much of the remaining glue residue as possible Cut new rubber stripping from a large piece of rubber to 21 x 3 8 This may require cutting out more than one strip of rubber depending upon how many rubber strips need to be replaced Fit the rubber stripping on to the canvas clamp or canvas holder Replacing the rubber stripping on the easel to table clamping device Over time the rubber stripping may wear out and it may become necessary to replace the stripping on the easel to table clamps To do this follow the directions below Remove the worn rubber stripping be sure to attempt to remove as much of the remaining glue residue as possible Cut new rubber stripping from a large piece of rubber to 21 x 3 8 This may require cutting out more than one strip of rubber depending upon how many rubber strips need to be replaced Fit the rubber stripping on to the canvas clamp or canvas holder Rubber stripping that has an adhesive surface is the easiest material to use as a replacement solution Replacing Velcro stripping on the White battery box 42 Due to repeated removal of the battery enclosure from the easel the Velcro may weaken over time Eventually it may become necessary to replace the Velcro to ensure that the battery enclosure remains attached to the easel Remove the battery enclosure from the easel and unhook the battery Gently remove the battery from the enclosure Using a knife
7. purchased This can be purchased from www Onlybatteries com This will be covered in the table at the end of maintenance Mechanical Function Not much else can be done to maintain the frame of the easel besides keeping it clean This will ensure that the joints keep their movement and adjustability DO NOT OIL THE JOINTS This will only impede the function of the locking mechanisms These mechanisms function by friction oiling these joints would remove this friction Case Specific Maintenance Components Failure If any of the mechanical components fail they can be replaced with some very simple tooling from a company called 80 20 Their web site is www 80 20 com Also refer to the following directions In the event that one of the nylon disks at a locking handle needs to be replaced follow the instructions below Remove the canvas holder by loosening the three hex screws on the side of each pivot joint gt NYLON DISKS LECATED HERE AND ON THE OTHER SIDE FOUR REPLACEMENT 36 Slide the canvas holder off the screws Completely remove the L handle by turning it in a counter clockwise direction until it comes off Set the L handle and any parts that do not need replacing aside 37 THAT MAY NEED TO BE REPLACED Replace the nylon disk s on the L handle assembly and reattach the L handle to the pivot joint The large nylon washer must be a 1 outer diameter 25 4mm washer If the entire L ha
8. 80 20 unit Total in mm in parts Part price price 25 2525 211 5359 4 25 2525 25 2527 16 406 4 25 2527 25 2550 16 406 4 1 BHSCS w Economy T nut 64 75 3404 2 hole inside corner brackets 14 25 4108 4 hole inside corner brackets 2 25 4113 rubber stripping 2 L brake handle assembly 2 25 6850 25 2525 end caps 20 25 2015 25 2550 end caps 2 25 2025 Pivot Bracket assembly 4 25 4051 25 2525 Unibearing 4 25 6760 Drop in T nut and Set Screw 4 End fastener and stainless steel screw 2 M6 threaded rod 2 M6 threaded female knobs 2 PCB 1 Super Bright 20 45 2 845 4 470 0 420 2 600 3 850 9 050 1 000 1 250 2 250 1 500 0 900 2 160 42 88 11 38 4 47 26 88 36 40 7 70 0 00 18 10 20 00 2 50 100 00 50 00 9 00 3 00 1 80 4 32 99 87 36 250 LED Potentiometer 1 1 51 1 51 Potentiometer Knob 1 5 13 5 13 Battery 9 6V 1700 mAh 1 20 95 20 95 Battery connector 1 2 99 2 99 Total cost 505 12 List of Parts for Replacement TECHNICAL DESCRIPTION LED Light On Or Switch LED Light Power Source This battery is a 9 6 volt battery pack It operates at 1700mAh and is a nickel cadmium power supply It is configured as a flat stick pack with the dimensions 180 X 22 X45 mm It also has a standard tamiya connector and includes a 12 volt battery pack charger for use in any standar
9. April 12 2006 Updated April 13 2006 Wikipedia org Tensile Strength lt http en wikipedia org wiki Tensile_strength gt April 12 2006 updated April 2 2006 www engineershandbook com Aluminum lt http www engineershandbook com Materials aluminum htm gt April 12 2006 70
10. Easel 5000 Operator s Manual By Alison Biercevicz Seth Novoson Justin Yu Team 3 Patty Mitchell Passion Works Studios 21S Campbell Street Athens OH 45701 740 592 6659 ext 252 Easel 5000 IMPORTANT SAFETY INSTRUCTIONS Warning Pinching hazard at joints Be sure that fingers are clear of any moving joint before adjusting the easel Only after fingers are clear of joints should one adjust the easel These joints include The four 180 degree pivots The L brakes on the canvas holder Adjustable friction positioning hinge for the LED light Base fasteners Warning Product does CONTAIN ELECTRICAL COMPONENTS Keep LED light enclosure closed at all times DO NOT OPEN THE LED LIGHT UNDER ANY CIRCUMSTANCES Keep water away from the LED light Keep paint and other painting supplies away from the LED light Keep water away from the battery compartment Keep paint and other painting supplies away from battery compartment Keep water away from the battery connectors Keep paint and other painting supplies away from the battery connection When recharging battery first connect the battery to the charger then plug the charger into the wall socket DO NOT PLUG IN THE CHARGER FIRST THEN CONNECT THE BATTERY DO NOT CUT ELECTRICAL WIRES DO NOT TAMPER WITH ELECTRICAL WIRES OR COMPONENTS DO NOT SHORT THE BATTERY DOING SO WILL CAUSE THE LEADS AND THE BATTERY TO HEAT UP WHICH CAN CAUSE
11. aluminum would be the best material for the construction of the easel Instead of plain aluminum stock Easel 5000 is made of aluminum extrusion produced by a company called 80 20 This extrusion was lightweight sturdy and aesthetically pleasing In addition the 80 20 extrusion was relatively cheap could be machined easily and did not require welding to assemble the frame Considering the ease of assembly was very important during the design process as easier assembly creates less headaches for the user Aluminum is also inert in the presence of water meaning that acrylic paints and other water based mediums will not harm the easel frame The following table was found in the course of research and was a deciding factor in the selection of aluminum as the construction material The 80 20 materials From left to right 25 2525 25 2550 and 25 2527 the 2527 extrusion was chosen for the base because a rounded look was desired and it also limited the number of pointed edges on the easel base 55 Some advantages of aluminum were e very lightweight about 1 3 the mass of an equivalent volume of steel or copper but with alloying can become very strong e excellent thermal conductor e excellent electrical conductor on a weight for mass basis aluminium will conduct more than twice as much electricity as copper e highly reflective to radiant energy in the electromagnetic spectrum e highly corrosion resistant in air and water inclu
12. attery s runtime should be around 6 hours at full charge so if it is left on by accident overnight then the battery will be drained Ifthe battery is fully charged and the LED system still does not work check the LED enclosure to make sure that no water paint or other liquid has gotten into the box It is very important that the LED enclosure not be opened as a replacement of this particular device is not possible Ifthe LED box has been deluged with water paint or another substance or the circuitry has been disturbed in some way the damage to the PCB inside may be irreparable In this case another light may be purchased online or from a local store and mounted onto the easel o Do not open LED casing as paint water or other substance may damage circuitry inside and may cause the device to stop working o Do not open the LED casing while the device is on e Problem The canvas is sliding off the easel when the canvas holder is inclined o Usually the canvas clamp is not securely in place and asa result the frictional forces usually provided by the rubber stripping is not great enough to hold the canvas in place To resolve this issue tighten the canvas clamp onto the frame of the canvas or other art surface Make sure that the rubber stripping contacts as much of the edge of the canvas frame as possible o Another possible cause is that the material mounted in the canvas clamp is too heavy In this case the canva
13. ble friction hinge to adjust the angle of illumination The canvas holder easily adjusts using locking brackets to fit a large range of canvases The canvas size it accommodates can range not only in length and width but also thickness This allows for a large range of painting medium The easel extension has two locking joints that allow the easel to extend forward backward up and down Also it allows the canvas holder to pivot 180 degrees The base allows the easel to attach to a wheel chair tray for ease of use The base is then capable of locking down via screw fasteners that lock it to a surface Each component is integrated into a functional unit for adjustment and use Ono switch LED Light 15 Easel 5000 Juma Ya Biomedical Engineering 2006 Class of Front View Side View 16 Back View Assembly Instructions Before you begin Before you begin assembling the Easel 5000 make sure you have a full set of hex wrenches These wrenches will be the only tools necessary to completely assemble the easel Assembling the Easel 5000 Base 1 Locate the base component labeled A This component should be assembled and contains a 2 16 Rounded Extrusions b 2 8 Square Extrusions c 1 16 Rectangular Extrusion d 4 2 Hole Corner Brackets e 12 Blue Screws f 18 T Nuts 17 2 Locate the base component labeled B This component should be assembled and contains 2 16 Rounded Extr
14. d wall socket The battery fully charges in 8 5 hours Its run time is approximately 6 hours Its input is AC 120 V at 60Hz and its output is DC 12V 200mA LEDs The LED s are super bright 5mm White 18 000mcd They are some of the brightest white LEDs available on the market today They are energy efficient as far as how much 46 power they dissipate They often dissipate less than 100 mill watts of power Their useable life is longer than 100 000 hours which ensures years of use with reasonable use The way the LED works is fairly simple It is a PN junction semiconductor embedded in an epoxy matrix This leaves no loose or moving parts to break When current is applied the diode emits light of a certain intensity based on the magnitude of the current Most LEDs operate on a current of 20 mA this circuit operates on 25 mA This current magnitude creates a brightness of 18 000 mcd This is the recommended brightness for art display in a gallery Eye safety for an LED this bright becomes an important factor DO NOT STARE DIRECTLY AT THE LEDS In order to avoid a problem with this LEDs with a luminous angle of 15 degrees was chosen Also the way the friction hinge was installed does not allow the LED enclosure to adjust in the direction of the user Also the dimming switch allows for a variable brightness A further feature of the LED light is the low heat dissipation This ensures the LEDs will not get too hot to cause a safety concern
15. der i O a Q 9 6 Volt Battery Pack Velcro for Attachment Hole for Battery Wire gt SSS Meg os Battery Pack Compartment CLASS 2 POWER UNITS Sai La oa E tesa moe G 4 ADA UHEL PA INPUT AC A DH CARPUT DIH Sites A ARITY ge DATE Jan MAR Aigi MEDE W reo Battery Pack Charger The following is a list of all of the easel frame and structural components e 1 Easel base component labeled A Fully assembled this component contains o 2 16 Rounded Extrusions o 2 8 Square Extrusions O O G 30 1 16 Rectangular Extrusion 4 2 Hole Corner Brackets 12 Blue Screws 18 T Nuts 1 Easel base component labeled B Fully assembled this component contains O O G G g 2 16 Rounded Extrusions 2 8 Square Extrusions 4 2 Hole Corner Brackets 8 Blue Screws 14 T Nuts 2 Knob Screw Fasteners eee i i 7 A N S B A 2 Easel base components labeled C 2 Easel extension arm components labeled D Fully assembled each component contains 1 12 Square Extrusion 1 5 Square Extrusion 1 Pivot Bracket Assembly 1 4 Hole Corner Bracket 5 Blue Screws 5 T Nuts OO 3 1 OO e 1 Easel canvas clamp component labeled E Fully assembled this component contains o 3 25 Square Extrusions 2 21 Square Extrusions 1 8 Square Extrusion 2 2 Square Extrusions 2 5 Square Extrusions 4 L
16. ding sea water e highly workable and can be formed into almost any structural shape e non magnetic e non toxic http www engineershandbook com Materials aluminum htm 4 The 80 20 cross sections From left to right 25 2525 25 2550 25 2527 The most important cross sectional area was for the 25 2525 The moment of inertia I was used in the bending stress calculations in the mechanical analysis 56 Description The Easel 5000 consists of four main parts constructed from 80 20 extrusion and the LED system which was constructed separately Each of the four mechanical sections is composed of either 29 2525 25 2550 or 25 2527 extrusion The Base The base was designed specifically to fit the smaller table that attaches to a wheel chair The particular mechanism for securing the easel to the table is embedded in the base in the form of a C clamp style locking clamp The two knobs turn and drive the flat metal plates upward The metal plates are covered with rubber to avoid scoring the table and to increase friction between the plates and the table These locking Knobs tighten sufficiently to secure the easel so that it may be used 1 5 38 1 mm was taken as the table depth and the metal plates used are approximately 3 88 inch in depth leaving a clearance of 1 8t inch to fit the base on to the table 0 22 The Extension Arms The extension arms were originally designed as a single arm with three joint articu
17. er There are important features and characteristics of the diagram to note The LM9555 chip is a highly stable device for generating accurate time delays or oscillation When configured in time delay mode it is controlled by one external resistor and capacitor It offers the ability to adjust the oscillating duty cycle through the adjustment of resistor and capacitor values Coupled with the resistors and capacitors values chosen for this application it creates a square wave power source Woe i THRESHOLD fa CONTROL 2 4 Voc VOLTAGE 1 3 GND OUTPUT TRIGGER 4 RESET r IE e ce DISCHARGE 4 eE Schematic for LM555 www national com GND Vec TRIGGER DISCHARGE OUTPUT THRESHOLD CONTROL RESET VOLTAGE TRIGGER Q R OUTPUT Example of basic setup of LM555 www national com 50 Example of Square waves created with LM555 www national com This makes the LEDs operate off of an alternating square wave This mimics an AC source and saves battery life by having the LED s flash on and off very quickly so it is not noticeable to the human eye This means the LEDs are only on half of the time therefore saving LED and battery life The operating voltage of the circuit is 9 6 volts There isa 3 6 volt drop across each LED Each transistor draws 1 mA of current during the on part of the square wave The potentiometer operates as the dimming switch by creating a larger vol
18. evers 1065 804501 Using the FBD shown in the previous diagram the moment about point C was found and from that the force required to hold the entire easel s weight in the configuration above 4 26E 03 N The table labeled Ff Needed shows the calculations for the force necessary on the locking mechanism in order to hold the easel in place with only one locking mechanism engaged 63 Stress on the screws Variable Value __ Units___ Value MPa 1 51E 08 Pa 150 780 4 26E 03 N 2 83E 05 m 2 steel for yield point lowest of steels 4 00E 08 Pa 400 Assuming that the screws used were made of the weakest steel the stress placed on the screw by the necessary compressive force was calculated The resulting stress of 150 7 MPa is less than the 400 MPa needed to cause the steel to yield and thus the screws are able to withstand the forces needed to support the easel with only one locking mechanism in place Bending Stresses Value Units Value MPa sigma M c I 1 94E 07 Pa 19 40 2 71E 01 N m 1 27E 02 m 1 77E 08 m 4 sigma yield strength 1 35E 08 Pa 135 To ensure that the moment caused by the weight of the easel would not cause the aluminum to yield the Bending Stress calculations were completed The bending stress found 19 4 MPa was much less than the 135 MPa need to yield the aluminum Note for the above calculations mechanical properties were taken from http ussautomotive com auto steelusal mechpropertie
19. full capacity is approximately six hours Battery Pack for LED Light Velcro for Attachment Hole for Battery Wire gt N Battery Enclosure 34 CLASS 2 POWER UNITS MESM oh OED k 4 AEFT Et Be WHEL PAR POLARITY E i HATE deW MAG Pipe MEDE Wi 12 volt Battery Charger MAINTENANCE There are few things that need to be done to the easel for maintenance The easel is fairly self sustaining and with some regular maintenance it can be kept functional for a very long time The easel should be maintained on three different time scales Regular Maintenance Long Term Maintenance and Case Specific Maintenance are the three categories of maintenance needed Regular Maintenance Battery Source If the easel is used everyday then the battery source will need to be recharged everyday or every other day This is a simple procedure that is explained in detail in the Easel Use section of the manual Cleaning Cleaning the easel of paint supplies can be done with a store bought cleaning supply designed for art supplies Keeping the easel clean will ensure it adjusts properly and the sliding pivoting motion will be maintained Try to keep slots in the easel frame free from debris 35 Long Term Maintenance Battery The battery has been designed to have a very long life time however if the battery has reached the end of its expendable life than a new 9 6 V battery pack can be
20. ghtened sufficiently then checking the weight of the material mounted is the next step Overloading the canvas with too heavy a material may lead to the canvas holder readjusting without any assistance In this case the size of the canvas must be changed and a smaller painting surface must be used Please see the Safety Precautions section The most common problem may be forgetting to tighten one of the clamps as described above If the problem persists check the L brakes and extension arm joints for damage to the nylon white washers If there is significant damage to the washers or one of the L brakes it should be replaced See the diagram below for the location of the washers and see the maintenance section for details BSS GS ee TEN HERE AND ON THE OTHER SIDE FOR REPLACEMENT Problem The battery keeps falling off How do I fix it o This is usually caused by wear on the Velcro that happens over time Simply replace the Velcro stripping See the maintenance section for instructions on how to replace the Velcro e Problem LED lighting system doesn t turn on What s wrong o Because the lighting system does not turn on does not mean the system is broken Ifthe LED system is left on overnight or has not been recharged after prolonged use it is possible that the battery just needs recharging e To fix this simply plug the battery into the charger for 8 and 2 hours to bring the battery back up to full charge e Note The b
21. icions Below is a diagram of the forces used in calculating the stresses placed on the easel as well as a table with the mechanical stress analysis results The forces created by the weight of the easel created a moment of 13 52 N m about the set of hinges attached to the base And the appropriate force required to hold up the easel could be supplied by the locking levers Weight Calculations The weights of each individual section were obtained by measuring the unit length in meters and then plugging into the following equations For lengths of 25 2525 For lengths of 25 2527 For lengths of 25 2550 60 The table below shows the results of the weight calculations These results were used in the computation of the bending stresses and normal stresses in respective selected aluminum extrusion lengths and screws that were needed to hold the easel in place Total Weight Number of Indiv N pieces Weight N 1 3 1 1 2 2 2 2 4 4 2 1 4 1 1 2 1 61 0 731m 0 701m Point C y k 0 151m gt lt y 0 225m 0 244m The diagram above was used to calculate the moment about the first set of dynamic pivot joints at point C For the ease of calculations the two pivots were taken as one and the two easel arms were taken as one 62 ao about Point Totals about Point C Fc divided across 2 locking l
22. inear Unibearings 2 Unibearing L Brakes 2 End Fasteners 2 Stainless Steel Screws 2 Pivot Bracket Assemblies 18 T Nuts 16 Blue Screws 1 Friction Hinge J O G O O O oO O O Q O o 1 LED System Assembly o 4 LED Encasement Screws o 1 Battery With Encasement e Packet of assembly parts containing o 6 2 Hole Corner Brackets o 8 T Nuts o 16 Blue Screws 10 PRODUCT FEATURES The features of the Easel 5000 include an LED light source a canvas holder an easel extension and a base The LED light source has a light intensity dimming adjustment an easy to use On Off switch and an adjustable friction hinge to adjust the angle of illumination It also includes a 9 6 volt rechargeable battery supply with charger The canvas holder easily adjusts using locking brackets to fit a large range of canvases The canvas size it accommodates can range not only in length and width but also thickness This allows for a large range of painting medium The easel extension has two locking joints that allow the easel to extend forward backward up and down Also it allows the canvas holder to pivot 180 degrees The base allows the easel to attach toa wheel chair tray for ease of use The base is then capable of locking down via screw fasteners that lock it to a surface Each component is integrated into a functional unit for adjustment and use Adistable Hinge On Or Switch LED Light Rechargeable 9
23. lations instead of two Because of design requirement changes from the first semester stability reasons and cost constraints the design was changed to a 2 arm design with two articulations The range of motion that the Easel 5000 has is large enough so that the easel can be used and has been tested ay X PRE AU A SAS EEEa EASEL BASE In the diagram above the parts labeled D are the easel arms Each of the extension arm beams are made of 25 2525 80 20 extrusion that are each 12 304 8mm long At the base are 2 dynamic locking pivot joints which are bolted onto two 5 127mm lengths of 25 2525 58 The Canvas Holder The Canvas holder was designed to accept up to a 20 X24 canvas art surface This section of the easel also includes rubber stripping and when the canvas clamp is used in conjuction with the canvas holder the painting surface can be inclined so that the artist can paint at an upward angle The Canvas Clamp The sliding canvas clamp is the fourth mechanical part of the easel It also has rubber stripping which can be used to hold the canvas or other art surface in place Both the canvas clamp and canvas holder have a slot in the center of the supporting beams where an art surface could be place 59 Mechanical Analysis Although it was believed that the aluminum extrusion would have no problem supporting the weight of the easel and canvas frame mechanical analysis was done to verify intuitive susp
24. ndle assembly breaks another can be ordered from AIR Inc in Framingham MA or another 80 20 distributor Part no 25 2796 After the part is replaced reattach the L handle assembly and fit the canvas holder onto the two pivot joint assemblies 38 Replacing the battery Note it should not be necessary to replace the battery for quite some time as it is rechargeable First unclip the battery from the wires connecting it to the LED system The correct clips can be found at the base of the easel Take the white battery enclosure off the easel 39 Remove the top of the white enclosure Grasp the battery and pull the battery out REMOVE BATTERY 40 Insert new 9 6V 1 7700mAh battery into the white casing REPLACE BATTERY Replace cap and put the enclosure back onto the Easel 4 Replacing the battery wiring after accidental wire severing Warning Rewiring a battery should only be done by a professional because of a significant shock hazard Discharge the battery before attempting to replace the wire If there is no one with experience to do the repair do not attempt to repair the battery wire Replacing the rubber stripping Over time the rubber stripping may wear out and it may become necessary to replace the stripping on the canvas clamp and or the canvas holder To do this follow the directions below Remove the worn rubber stripping be sure to attempt to remove as
25. o be made to suit the artist s position and liking PIVOT BRACKET ASSEMBLIES EXPANDED AND ISOLATED UN ON NEXT DRAWING COMPONENT E TIGHTEN LONG SCREWS 7 Sa SY or INTO END OF EXTRI ISION 7 es a T aes 3 J TO INSERT INTO T S OF EXTRUSION 25 The Easel 5000 should now be completely assembled After assembly the Easel 5000 should like the following It is now ready to use with two fully adjusting pivot points and an adjustable canvas size clamp In order to use the LED system attach the battery to the back of the canvas clamp by adhering the Velcro strips together Plug in the battery connector to the LED wire jack Please see the following section titled Easel Use for more instructions on adjusting the Easel 5000 and operating the LED system 26 Easel Use The Easel 5000 use is broken down into three major sections Adjustment Attachment and LED Light Use Adjustment Adjustment for the easel is controlled by a series of locking L handles When the L handles are rotated and tightened 4 0 64mm clock wise the handles are in their locked position When the handles are rotated counter clock wise this is the unlocked position When the handles are in their unlocked position this allows the joint that the L handle is located at to be adjusted L Handle Canvas Holder To adjust the canvas holder you must unlock the L handles on either side of the holder one at a time This then frees the holder
26. on 2 2 Square Extrusions 2 5 Square Extrusions 4 Linear Unibearings 2 Unibearing L Brakes 2 End Fasteners 2 Stainless Steel Screws 2 Pivot Bracket Assemblies 18 T Nuts 16 Blue Screws 1 Friction Hinge 1 LED System Assembly 4 LED Encasement Screws Ob grrr pm ho oo op 22 2 In order to attach the clamp component to the rest of the assembled easel it may be easiest to adjust the pivots of the extension arms down flat as shown 3 Remove the t nuts found at the ends of the long blue screws of the pivot bracket assemblies These t nuts have been placed here so that the special long screws would not get separated from the assemblies The t nuts are extras and are not necessary for the rest of the easel s assembly but they can be interchangeably used anywhere else on the easel as replacement t nuts 23 T NUT TU Ba REMOVED 4 Un tighten the l brakes on the pivot bracket assemblies so that they are loose but still on the assemblies 24 5 Attach component E to the rest of the assembled easel In order to do this you must ensure that the flat nub of the l brake slides into the slot of the extrusion Then the long blue screws of the pivot bracket assemblies must be tightened all the way to fasten the pivots onto the extension arms Make sure both sides of the easel are fastened tightly and are on evenly The l brakes previously loosened may now be retightened Minor adjustments may need t
27. or other cutting tool carefully remove each of the three Velcro strips from the battery box LED light Failing If the entire LED light fails it can be replaced by a store bought light This is the suggested means of replacement Otherwise the technical description can be referenced for further ideas on how to fix it Parts list Section Description in mm in ee Part price price 25 2525 Base extrusion 215 9 25 2525 1 727 6 91 25 2527 Base extrusion 16 406 4 4 25 2527 2 845 11 38 25 2550 Base extrusion 16 406 4 1 25 2550 4 470 4 47 25 2525 Base extrusion 2 50 8 2 25 2525 0 406 0 81 M6 threaded Base rod 2 5 63 5 2 0 900 1 80 M6 threaded Base female knobs NA 2 2 160 4 32 2 Hole inside corner Base brackets 14 25 4108 2 600 36 40 BHSCS w Economy T nut for 2 hole inside corner Base brackets NA 28 75 3404 0 420 11 76 BHSCS w Economy T nut for 25 2550 16 Base length NA 4 75 3404 0 420 1 68 Drop in T nut and Set Base Screw NA 4 25 3313 2 250 9 00 Base 25 2550 End NA 2 25 2025 1 250 2 50 43 Extension Arms Extension Arms Extension Arms Extension Arms Extension Arms Extension Arms Extension Arms Canvas Holder Canvas Holder Canvas Holder Canvas Holder Canvas Holder Canvas Holder Canvas Clamp Canvas Clamp Canvas Clamp Canvas Clamp Canvas Clamp Canvas Clamp Canvas Clamp caps 25 2525
28. ows the calculated forces and moments for the diagram above as well as the force necessary to stabilize the easel on the table This force is labeled Ft Stress on the screws Value Units Value MPa 4 40E 06 Pa 1 24E 02 N 2 83E 05 m 2 Assumed Structural steel for yield point lowest of steels 4 00E 08 Pa To ensure that the threaded rods bought would be able to function in the role intended the value of stress was determined The stress put on the screws 3 30 MPa was far less thant the yielding stress of the screw s material 400 MPa The mechanical analysis showed that the easel would function under normal operating parameters and the secondary locking system and the easel clamping system would work as well 66 TROUBLE SHOOTING Although Team Easel 5000 hopes that the use of the easel will be seamless this trouble shooting section has been included to help the operator or assistant with common questions that may arise Please note that any repairs to the frame should be done by someone who has had some experience in metalworking woodworking and repairs to the battery should be done by an individual who has experience in electronics e Problem What if the canvas holder or extension arms move while the locking mechanisms are engaged o This can be hazardous for the user if the problem is not resolved quickly The canvas holder or the arms can move as a result of several situations If all the clamps are ti
29. rolled by screw fasteners located at the bottom of the base The base can be slid onto a wheel chair tray and locked into place by tightening the screw fasteners Sliding Base onto Wheel Chair Tray This locks the easel base onto the wheel chair tray for use 31 TURN KNOB TO TIGHTEN CLAMP LED Light Use The LED light can be adjusted up and down via a friction hinge that attaches it to the Canvas Holder The LED light can also be dimmed using the dimming knob located on the underside of the light compartment To turn the light on and off there is an on off switch located on the right side of the light compartment 32 kk On OF Switch LED Light LED Adjustment Battery Use To connect the battery line up the red wire of the battery with the red wire of the connector then line up the black wire of the battery with the black wire of the connector 33 Insert the male end of the connector into the female end of the connector To charge the battery remove it from its Velcro plastic box Next line up the red wire of the battery with the red wire of the connector then line up the black wire of the battery with the black wire of the connector and insert the male end of the connector into the female end of the connector Then with the charger provided plug it into a standard wall socket Charging is complete after approximately 8 5 hours Battery run time with the LED light operating at
30. s being used should be downsized 68 Do not overload the canvas holder Do not place materials larger than 9 X36 or 20 X24 into the easel frame Do not attempt to adjust the canvas clamping mechanism while the canvas holder is over the artist o The last possibility and most unlikely is that the glue attaching the rubber stripping to the canvas holder or canvas clamp could be worn To fix this problem two options are available e Glue the existing rubber stripping back on e Buy and cut new rubber stripping as described in the maintenance section Either option should restore easel functionality Closing Remarks We wish the best of luck to the artist and assistant Much time and energy went into the development and construction of this easel and we know it will help Please do not hesitate to contact us in the future if we can be of any assistance Team 3 69 REFERENCES National Semiconductor LM555 Timmer http cache national com ds LM LM555 pdf April 11 2006 The LED Supply Super Bright LEDs http www ledsupply com December 1 2005 Reell Incorporated Positioning Friction Hinge http www reell com downloads drawings reell_phce pdf April 11 2006 Hammond Manufacturing 599 Series box http www hammondmfg com pdf 1599E pdf April 11 2006 Usautomotive com Steel vs Aluminum Mechanical Properties lt http ussautomotive com auto steelvsal mechproperties htm gt
31. s htm and http en wikipedia org wiki Tensile_strength Because one locking mechanism can be used to support the weight of the easel and simulated canvas the second serves as an equalizer and secondary locking system This is so that if one clamp is undone the positioning assistant can make sure he or she has a firm grip on the easel before releasing the second clamp 64 Mechanical analysis of the base provided the force necessary to hold the easel in place and secure it to the table The diagram below shows the forces considered when calculating the moment about point D 0 620m eg 0 590m a 0 560m 0 229M _ an 0 363m 0 167m 0 110m q Nica X Point D LO a oa lt q 5 W10 W8 2 0 041m gt y 0 114m 3 p lt lt S 0 133m P lt y 0 207m y Note The weights and forces denoted by W and F have Newton s as units of measurement 65 W3 2 W9 W10 W11 W12 W13 13 91 3 89 1 48 1 85 4 45 1 85 O22 6 31 0 74 9 20 2 28 4 64 Ri b m 0 363 0 133 0 62 0 207 0 041 0 11 0 229 0 11 0 229 0 11 0 701 0 671 Moment about Point D Section Wi N Mi N m Wc 13 34922 0 474 WL 4 41 0 62 WHT 1 35 0 207 WB 11 07 0 225 Totals about Point C Fc divided across 2 locking levers 124 3071 0 167 20 759 The table labled Moment about Point D sh
32. tage drop when the resistance is turned all of the way up 5I Entire LED Circuit Express PCB Zoom of LM555 Chip in the Circuit Express PCB The potentiometer operates as the dimming switch by creating a larger voltage drop When the resistance is turned 32 up to its maximum of 10 Kohm it creates a large voltage drop and gives less voltage and current to the LEDs thus causing them to burn less brightly However when the resistance is turned all of the way down then the only voltage drop is across the 3 2 Kohm resistor This causes the maximum amount of voltage and current to be delivered to the LEDs and thus allowing them to burn brightly Printed Circuit Board PCB The following is a lay out for the circuit that was adapted to a PCB This is the way the circuit is set up inside of the LED enclosure Careful consideration had to be taken when setting up the PCB in order to connect appropriate wires avoid crossing wires and avoid shorting components by placing them too closely This took trial and error and repeated checking of measurements Further more many custom foot prints had to be made to fit special parts like the switch battery and potentiometer One should take notice DO NOT OPEN the PCB enclosure under any circumstances There is important and delicate circuitry inside that can be damaged by art supplies touch or water a ne LE LOR 1 ME 9 witii Gi ieee aa PCB Schematic Express PCB 53
33. to slide up and down in order to lock it onto the painting surface Zi Adjusting Canvas Holder There are slots located in the canvas holder to hold thinner painting surfaces There is also rubber stripping to hold thicker painting surfaces ne Additional adjustment of the canvas holder can be achieved with an Alan wrench This adjustment can be preformed as an additional way to adjust the height of the canvas holder An Alan wrench can be used to loosen the bolts that attach the 180 degree pivot to the top of the easel extension Once the bolts are loosened on both sides the pivot can be moved higher or lower on the canvas holder to adjust the height 28 Adjusting Easel Height Once the desired height is achieved then an Alan wrench can again be used to retighten these bolts 29 Easel Extension To adjust the easel extension there are four 180 degree pivot brackets These are located at the point of attachment between the canvas holder and the easel extension and at the point of attachment between the easel extension and the base 180 Degree Pivot These can be adjusted by loosening the L handles one at a time then pivoting the canvas holder on the easel extension or pivoting the easel extension on the base WN a er dt 7 A A x Ly Rey Py Ai x N Y Y s on N il yf 7 X ane fi ADUAN Easel Extension 30 Attachment Attachment for the easel is cont
34. usions 2 8 Square Extrusions 4 2 Hole Corner Brackets 8 Blue Screws 14 T Nuts 2 Knob Screw Fasteners moo op 3 Attach the 2 hole corner brackets to the 2 square extrusions labeled C provided as shown 2 HOLE BRACKET 18 4 Attach components A B and C as shown using t slots 2 hole brackets and screws to fasten components together FUR UTHER EASEL SOUU The final Easel 5000 Base should look like the following Assembling the Easel 5000 Extension Arms 1 Locate the extension arm components labeled D These components should be assembled and each contains a 1 12 Square Extrusion b 1 5 Square Extrusion c 1 Pivot Bracket Assembly d 1 4 Hole Corner Bracket e 5 Blue Screws f 5 T Nuts 20 2 Attach component D to the completed easel base as shown using t slots 4 hole brackets and screws to fasten components together Be sure to have a 6 inch space between the two arms as shown OTE EASEL BASE HAS CROPPED IN ORDER TO FACILITA VIEW FOR 21 The Easel 5000 should now look like the following with extension arms attached to the base gs wf tif if if Joh f a AA af tig s sf Ae x of A A PREVIDUSLY ASSEMBLED EASEL BASE Assembling the Easel 5000 Canvas Clamp 1 Locate the canvas clamp component labeled E This component should be assembled and contains 3 25 Square Extrusions 2 21 Square Extrusions 1 8 Square Extrusi
35. vas weights in excess of ten pounds Make sure that both sets of locking mechanisms engage for canvas loads of over 3 pounds Warning DO NOT OVER ADJUST DIMMING SWITCH ON THE LED LIGHT The dimming switch has a maximum of one full turn Do not attempt to turn the dimming switch past one full turn Warning DO NOT LOOK DIRECTLY AT THE LED LIGHT If adjusting the LED light dim it or turn it off first Only after one is sure that the LED light is not facing a person should one turn it on Looking directly at the LED light for an extended period of time can cause damage to one s vision Warning DO NOT PLACE EXCESSIVE FORCE ON THE EASEL Do not use the easel for holding objects other than art paper and cavases The easel may be used to hold sheets of metal within the specified weight range DO NOT USE THE EASEL TO SUPPORT A PERSON S WEIGHT DO NOT HANG OR LEAN ON THE EASEL Warning Do not use the easel if the base is not securely fastened to the surface it is mounted on Failure to secure the base to the surface it is mounted on can result in the easel falling on the artist Make sure both fasteners on the base are secured to its mounting surface before use PARTS AND ACCESSORIES The following is a pictorial list of the parts that comprise the easel In the package that came with this user s manual you should have the following easel components On Or Switch LED Light attached to canvas hol
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