General International 15-250 M1 Use and Care Manual
Contents
1. Note Generally snipe problems occur when pressure rollers are too low Less frequently this problem occurs as result of loo much fension in the pressure rollers It is thus possible that although you adjusted the height of the rollers you still get snipe on your board If this is the case adjust the tension of the rollers Proceed as follows ZN Always turn off and unplug the sander before performing any maintenance or adjustments 1 access the set screw and micro adjustment 2 Using the 2 mm T handle Allen key provided sli spring unlock the drum cover latch and open turn the set screws at each end of the the top cover corresponding pressure roller s to be adjusted 3 Close the top cover plug in the machine and run a test piece though to check for snipe 4 If needed continue adjusting the height of the pressure rollers until you get no more snipe on your board If affer several adjustments you do not obtain satisfactory results by adjusting the height of pressure roller agjust its tension as follows TN Always turn off and unplug the sander before performing any maintenance or adjustments 1 access the micro adjustment spring unlock the drum cover latch and open the top cover Slightly turn the phillips head screws located at each end of the corresponding pressure roller s to be agjusted Fig 14 Close the top cover plug in the machine and2. and gears located at either end of the machine greased and free of dust or debris Clean and remove dust debris and old grease after every 10 15 hours of use After cleaning re apply a generous coating of any common automotive bearing grease Fig 8 PERIODIC MAINTENANCE 1 Inspect test the ON OFF switches before each use Do not operate the sander with a damaged switch replace a damaged switch immediately 2 Keep the machine especially motor and conveyor as well as the feed table conveyor clean and free of dust or glue Vacuum or brush off any loose debris and wipe down the machine and the conveyor occasionally with damp rag drums must always be kept clean Dirt on the drums will cause belt slippage motor and drum bearings are sealed and permanently lubricated no further lubrication is required Periodically inspect the power cord and plug for damage as well as the sanding belts the drums the motor pulleys drive belts and the conveyor belt Never operate the sander with any damaged part Replace a damaged part at the first visible signs of damage REQUIRED MAINTENANCE MOUNTING AND REPLACING THE SANDING BELTS sanding belts should be replaced when worn out Pre cut replacement belts can be purchased in a variety of grits your General International dealer under the following paris numbers e 36 grit 15 251 e 120 grit 15 255 e 60 grit 15 252 e 150 grit 15 256 e 80 gr
3. www general ca BASIC FUNCTIONS OF THE UNIT This 24 horizontal double drum sander is designed for surface sanding of wooden cabinet doors flat wooden pa nels wide glue ups and other natural wood products only This sander is not intended and should not be used to sand any material other than wood The main time saving feature of this unit is That it allows for sanding at 2 successive grits in one single pass Use rougher lower numbered grit sandpaper on front drum and a finer higher numbered grit sandpaper on the rear drum selecting the right combination of grits to use on each drum will depend on experience personal preference and the finish requirements of The work Keep in mind that normal sanding principals apply and that each successive grit further smoothens the surface and removes the scratch marks left by previous grit For ideal results never install a grit on the rear drum that is too high a jump up no more than 2 grits higher from the grit installed on the front drum As an example if a 100 grit paper is installed on the front drum then either 120 or 150 would be suit able for the rear drum Itis always preferable to remove less material per pass and take multiple passes This can extend sanding belt life place less strain on the motor and provide better workpiece finish quality Note As with any other drum or belt sander depending on the final finish quality you require some final hand san
4. PANEL 15250 34 2090001 1 DUST HOOD SUPPORT PANEL 15250 35 20702019 HINGE 2 15250 36 20900012 DUST HOOD DRUMS COVER 15250 37 20703016 DUST HOOD DRUMS COVER HANDLE 15250 38 50010502 SCREW o 16 18UNCX3 4 L 18 15250 39 20900070 UPPER CLASP 15250 40 20900071 LOWER CLASP 15250 41 20900068 HINGE PAD 5541 2 15250 42 50030405 PHILLIPS HEAD SCREW 1 4 20UNC 24 15250 43 50210401 FLAT WASHER 1 4 13 1 15250 44 50110400 NUT 12 15250 45 20900013 PULLEY GUARD 1 15250 47 50230400 LOCK WASHER 1 4 46 15250 48 20900014 UPPER BRACKET 2 15250 49 20900015 COLUMN SUPPORT BRACKET 2 15250 50 20900016 LOWER BRACKET 2 15250 51 20900017 WORM GEAR 2 15250 52 20900018 WORM 2 PARTS LIST 15 250 MI PARTS LIST 15 250 MI PART NO REF NO DESCRIPTION SPECIFICATION 15250 53 20900019 BUSHING 15250 54 50520080 CIRCLIP 580 15250 55 50050500 SET SCREW 15250 56 50050406 SET SCREW 15250 57 20900020 SCREW HOLDER 15250 58A_ C5151102 BEARING 51102 15250 58 20900021 BRONZE COLLAR 15250 59 20900022 BEVEL GEAR 15250 60 50010616M HEX HEAD BOLT M X 1 0 X 16 15250 61 50010303 HEAD BOLT 3 16 24UNCX3 8 L 15250 62 20900023 GEAR SHAFT BUSHING 15250 63 20900024 POSITIONING COLLAR 15250 64 20900025 TRANSMISSION SHAFT 15250 65 20900067 MOUNTING BRACKET 15250 66 20900026 POST COVER BEND IN O INNIOF I F N N IW MIB ND O NI IN IN IOO E 15250 68 900
5. fne workpiece once again 12 Inspect and slowly run your hand over your workpiece to determine whether or not further passes are required For better workpiece finish quality make shallower passes with the conveyor table height adjusted so you just start hearing the contact noise 13 If needed pass the workpiece again raising the table not more than 1 8 of a turn at a fime Repeat until desired finish quality is achieved Note To avoid overworking the motor creating a potential circuit overload or damaging the sanding drums do not force fhe workpiece against or into the drums Do not use this sander as a thickness planer Never attempt to remove more than the depth of the grit of the sand ing belts in any single pass Too much friction will cause belts to overheat and wear prematurely and in extreme cases may cause burns in the workpiece TO STOP THE MACHINE 1 Press the red OFF button on the control box to stop the rotation of the drums Push the red switch to the OFF position to stop the conveyor belt Remove the key switch This will prevent unauthorized use of the machine pe d A Turn your dust collector off Always turn off the sander BEFORE turning off the dust collector LUBRICATION Disconnect machine from power source before performing any maintenance or lubrication Note Unscrew and remove both left and right cover to access the conveyor elevation mechanism Keep threaded rods
6. reduce the risk of damage to the sander or the workpiece as well as a potential for personal injury after initial set up as well as before each use make sure that everything is securely installed and that all fasteners and mo ving parts on this sander are locked in place before starting the machine set the height of the rear drum see section Adjusting the height of rear drum on page 12 Place the workpiece on the conveyor belt set the height of the conveyor table see section Raising Lowering the Conveyor Table on page 11 Remove the workpiece from the conveyor belt dms ee Turn on your dust collector 1 Always turn on the dust collector BEFORE starting the sander Keep hands away from the rotating drums and conveyor belt Do not force the workpiece towards the sanding drums let the conveyor belt feed the workpieces 6 Press the green button on the control box to start the sanding drum motor 7 Insert the safety key into the conveyor belt switch 8 Set the feed speed to minimum before starting the conveyor belt then lift switch up to start conveyor motor Gradually increase the speed until you reach the desired feeding speed 9 Place the workpiece on the center of the conveyor belt and pass the board once 10 Step To the rear of the machine and pick up workpiece on the out feed Note Consider using a proper support on the out feed for workpieces longer than 4 11 Pass
7. step clamp forward and remove the tab of the sanding belt from the slot of the left end of the drum MOUNTING NEW SANDING BELT Note To extend belt life and avoid premature breakage take note of the direction of the arrows printed on the inside of the sanding belt to make sure you install the belt in the correct direction 1 Pull and hold the left spring loaded clamp 2 Insert the left tab of the sanding belt in the slot pushing all the way in as far as possible then release the clamp to lock the tab in place 3 Tightly wind the sanding belt around the drum making sure that there are no spaces between the edges of the sanding belt that the belt is taut and that there are no bumps Do not overlap the edges 3 Note The spring loaded clamp at the right end of the drums is a two stage spring The first stage grabs the paper and the second stage pulls the clamp backward inside the drum providing proper tension to the sanding belt ls LT 4 Push and hold the right two step clamp for 5 Insert the right tab of the sanding belt in the slof ward with your thumb pushing all the way in as far as possible until it is tight Tip Use a flat stick or any similar non cutting object fo force the tab further into the slot so it is as tight as possible O Note On occasion due to slight variations in the length of the sanding belts or in the depth of installation in the left b
8. with the con veyor table and needs no further adjustments The rear drum is micro ajustable It can be slightly raised or lowered at each end and must be kept parallel to the table Effect exaggerated for clarity set the rear drum to the correct height proceed as follows 1 Place two gauge blocks not included on the conveyor belt positioned one under each end of the front drum with the sanding belt installed on Fig 4 Note To achieve parallelism with the front drum any gauge blocks that are used whether purchased or shop made must be a matching set and must both be at the same height 2 Raise the table until gauge blocks barely touch The drum AN Always make sure the sander is disconnected from the power source before opening the drum cover and remo ving installing sanding belts or adjusting the height of the rear drum 3 To access the sanding belts unlock the drum co ver latch and open the top cover The sanding belts are tightly wound around the drums and atta ched at both ends by spring loaded clamps Fig 5 4 Remove the sanding belt from the rear drum See section Removing the sanding belts on page 17 5 Place the two gauge blocks one under each end of the rear drum 6 Using the 6 MM T Handle Allen wrench provided slowly turn the micro adjustment screws located at each end of the drums counterclockwise to lower the drum until it barely tou
9. 0 9 a W e 28 REF NO DESCRIPTION SPECIFICATION 15250 01 20900001 DRUM 2 15250 02 20703010 TWO STEP CLAMP 2 15250 03 20703010B TWO STEP CLAMP PLATE 2 15250 04 20 03010A SPRING 2 15250 5 20 03014A SPRING 2 15250 06 20703014 FIXED CLAMP BRACKET 2 15250 07 20703014B FIXED LAMP PLATE 2 15250 08 20703014C _ SPRING 2 15250 9 90040300 PHILLIPS HEAD SCREW 2 15250 10 50110300 NUT 3 16 24UNC 15250 11 20900086 RIGHT CLAMP 3 15250 12 20900087 LEFT CLAMP 3 15250 13 20900069 MICRO ADJUSTMENT SPRING 15250 14 90030580M PHILLIPS HEAD SCREW 15250 15 90120500M NYLON NUT MS5X0 8 15250 16 20900002 CLAMP BLOCK 2 15250 17 20900003 RIGHT BEARING HOUSING 15250 18 20900004 LEFT BEARING HOUSING 15250 19 20900005 RIGHT MICRO ADJUST BEARING CAP 15250 20 20900006 LEFT MICRO ADJUST BEARING CAP 15290 21 90020530A __ MICRO ADJUSTMENT SCREW 2 15250 22 SOSETWO CIRCLIP E 9 15250 23 20703002 BEARING CAP 15250 24 C 1206205 BEARING 6205 4 15250 25 50060510 SCREW 8 15250 26 50210500 FLAT WASHER 38 15250 27 50230506 LOCK WASHER 5 16 62 15250 28 50120500 5 16 18UNC 30 15250 29 20900008 DRIVE ROLLER 2 15250 30 50210532 FLAT WASHER 3 8 23 2 15250 31 500205121 LEFT THREADED SCREW o 16 18UNCX1 L 2 15250 32 20900009 CORNER BRACKET 4 15250 33 20900010 FRONT UPPER
10. 40307 PHILLIPS HEAD SCREW 5 16 18UNCXT L 15250 69 20900028 BRONZE COLLAR COVER 15250 0 50520015 CIRCLIP 515 15250 71 50310420 PIN AX20 15250 72 20900029 CRANK HANDLE 15250 73 10105056A HANDLE KNOB 15250 74 20900030 SWITCH MOUNTING PLATE 15250 75 W2092301D MAGNETIC SWITCH 15250 6 50030318 SCREW 3 16 24UNCX3 4 L 15250 77 50040308 FLAT HEAD SCREW 15250 78 10401008 CORD BUSHING 15250 79 20900066 SWITCH REAR GUARD 15250 80 2090003 1 MOTOR BASE 15250 81 50020501 HEX HEAD BOLT 2 15250 82 20900032 MOTOR ADJUSTMENT PLATE 15250 83 0000000 MOTOR 15250 84 20900033 DRIVE PULLEY 15250 85 50430640 6X40 15250 86 20900034 BASE SHAFT 15250 87 20900035 POSITIONING SHAFT 15250 88 20900036 SCREW 15250 89 20900037 FRONT COVER 15250 90 20900038 REAR COVER 15250 9 20900039 FRONT PANEL 15250 92 20900040 REAR PANEL 15250 93 50010500 SCREW 9 16 198UNCX 1 2 2 15250 94 20900041 SHIELD PLATE 15250 95 50020408 SCREW 1 4 X1 2 15250 96 20900042 RIGHT COVER 15250 97 20900043 LEFT COVER 15250 98 20900044 GRADUATED SCALE 15250 99 20900045 INDICATOR 15250 100 20900046 BELT PLATEN 15250 101 20900047 MICRO ADJUSTMENT BLOCK 15250 102 20900048 MICRO ADJUST MOUNTING BRACKET 15250 103 20900049 BEARING CAP 30 15250 149___ 1206150 T HANDLE ALLEN WRENCH NOT SHOWN 6MM 15250 149A 51202100 15250 149B 50910103 15250 161 15250 162 15250 163 15250 164 15250 165 15250 166 PART NO REF NO DESCRIPTION SPE
11. CIFICATION QTY 15250 104 20900050 FRONT CONVEYOR ROLLER 15250 105___20900051 POSITIONING PLATE 15250 106 20900052 CONVEYOR DRIVE ROLLER 15250 107 __C 1106202 BEARING 6202 4 15250 108 50120200 NYLON NUT 1 4 20UNC 10 15250 109 20900053 PAD 2 15250 110 20900054 SHAFT JOINT 2 15250 111 50050404 SCREW 1 4 20UNCX1 4 L 2 15250 112 _ 20900055 ELECTRIC CONTROL BOX 15250 113 2070101 ELECTRICAL INSULATION BOARD 15250 114 S0040510M PHILLIPS HEAD SCREW 2 15250 115 WOO0000 SAFETY SWITCH 15250 116 S1017W 2 PLASTIC CLAMP 15250 11 S1006P 4 PLASTIC CLAMP P 4 15250 118B M2090002 SPEED REDUCTION MOTOR 15250 119B 20900073 PC BOARD 1 15250 120 40501019 REGULATOR KNOB 15250 121 40501018 PC BOARD MOUNTING PLATE 15250 122 20900056 BOITOM COVER ELECTRIC CONTROL BOX 15250 123 50030304 PHILLIPS HEAD SCREW 3 16 24UNCX 4 L 18 15250 124 S0010615M _ CAP SCREW 1 4 20UNCX3 4 L 18 15250 128 10401029 FOOT PAD 4 15250 129 50090512 SCREW 5 16 18UNCX5 8 L 4 15250 130 _ 0010503 CAP SCREW o 16 18UNCXA L 2 15250 131 20900060 PRESSURE ROLLER FRONT 2 15250 131A 20900060A PRESSURE ROLLER REAR 15250 132 20701006 BEARING 15250 133 _ 50520028 CIRCLIP 528 2 15250 134 50040410 PHILLIPS HEAD SCREW 1 4 20UNCX5 8 L 4 15250 135 V0017500 V BELT 2 15250 136 2090006 CONVEYOR BELT 15250 137 LOO0000M POWER CORD 15250 138 _ 10000000 CORD 15250 139 209000 SWITCH WIRE 2 15250 140 L2090002A WIRE WITH TERMINA
12. ITCH CONVEYOR BELT DEPTH GAUGE CONVEYOR TABLE oocoococGo Carefully unpack and remove unit and its components from shipping container and check for missing or damaged items as per the list of contents below NOTE Please report any damaged or missing items to your GENERAL INTERNATIONAL distributor immediately LIST OF CONTENTS Once the parts have been removed from the packa ing you should have the following items QTY 24 HORIZONTAL DOUBLE DRUM SANDER HARDWARE BAG from left to right Sie NLS 2 0 1 H OU Me KEY 2 1 1 HANDLE ALLEN WRENCH 2 HANDLE ALLEN WRENCH 12 14 MM COMBINATION WRENCH ADDITIONAL REQUIREMENTS FOR SET UP e Extra person for help with liffing e Phillips Screwdriver e 10 mm open end wrench e Utility knife e Flat piece of wood or any similar non cutting object PLACEMENT WITHIN THE SHOP ESTABLISHING SAFETY ZONE This sander is heavy Do not over exert The help of an assistant will be needed for the following step To limit the risk of serious injury or damage to the machine any equipment used to lift this machine forklift or lift ing hook should have a rated capacity in excess of 570 Ibs 259 kg PLACEMENT WITHIN THE SHOP This machine should be installed and operated only on a s
13. LS 2 15250 141 _ 20900062 SANDING BELT SEE 15 253 P80 15250 142 20900063 SANDING BELT SEE 15 255 P120 15250 143 J2090001 WARNING LABEL 15250 144 J2090002 WARNING LABEL 15250 145 10101002 COVER CUSHIONS 4 15250 147 20900064 COVER PANEL 15250 148 50911214 COMBINATION WRENCH NOT SHOWN 12 14MM 2 2 2 2090008 20900082 20900083 20900084 20900100 20900101 PARTS LIST 15 250 MI HANDLE ALLEN WRENCH NOT SHOWN 2MM ALLEN KEY NOT SHOWN o MM SPACER SIDE PANEL FRONT PANEL REAR PANEL SCALE POINTER ADJUSTING COLLAR PART NO 15250 167 15250 168 15250 169 15250 170 15250 192 15250 193 REF NO J2090012 S0030305 S0050103 S0050306N S0230500M 90030310 NOTES PARTS LIST 15 250 MI DESCRIPTION SPECIFICATION INDICATOR DIAL 2 SCREW 2 SCREW 2 SET SCREW 3 16 24UNCX5 8 LOCK WASHER 8 SCREW 3 16 24UNCX5 8 L 15 250 1 GENERALI UNTERNATI NAL RE ety gt 8360 Champ d Eau Montreal Quebec Canada HIP 1Y3 Tel 514 326 1161 Fax 514 326 5565 Parts Service Fax 514 326 5555 Order Desk orderdeskageneral ca www general ca IMPORTANT When ordering replacement parts always give the model number serial number of the machine and part number Also a brief description of each and quantity desired
14. SETUP amp OPERATION MANUAL osi 24 HORIZONTAL DOUBLE DRUM SANDER Steel frame and heavy duty base for greater stability High quality conveyor belt for longer service life Parallelism between the sanding drums and the conveyor belt is adjusted by con venient adjustment screw Large hand wheel adjusts conveyor table height Magnetic safety switch Two 2 4 dust outlets Graduated depth scale in both inches and metric to indicate sanding thickness Conveyor belt equipped with a safety switch with removable key Dual v belt driven sanding drums Variable speed conveyor belt MAXIMUM SANDING WIDTH 24 610 mm MAXIMUM SANDING THICKNESS 5 127 mm MINIMUM SANDING THICKNESS 1 4 6 mm MINIMUM SANDING LENGTH 5 127 mm DRUM DIAMETER 5 127 mm DRUM SPEED 1550 RPM FEEDING SPEED 3 to 20 FPM 0 93 6 2 M MIN VARIABLE BASE DIMENSIONS L X W 42 1 2 x 16 1 2 1079 5 x 419 mm MAIN MOTOR 3 HP 220 V 1 Ph 15 CONVEYOR MOTOR 6 HP 15 250 MI WEIGHT 570 LBS 259 kg REVISION 3 MARCH 05 13 COPYRIGHT GENERAL INTERNATIONAL 03 2013 GENERAL INTERNATIONAL 8360 Champ d Eau Montreal Quebec Canada HIP 1 Telephone 514 326 1161 e Fax 514 326 5555 www general ca THANK YOU for choosing this General International model 15 250 24 Horizontal Double Drum Sander This machine has been carefully tested and inspected before shioment an
15. TS START UP WHEN REMOVED This model 15 250 MI is also equiped with a simple ON OFF switch for The conveyor motor featuring a removable lock out safety key To start the conveyor belt insert the safety key and lift the switch up To stop the machine pull the switch down 3 To prevent unauthorized use or unintentional start up remove the safety key and store it in a safe place whenever the sander is not in use Remove the switch key and store it in a safe place out of the reach of children whenever the sander is not in use OVERLOAD PROTECTION Ihe magnetic safety switch on this sander is equipped with an overload protection feature To prevent an electrical overload from damaging the motor the event of a spike in line voltage or amperage draw the internal overload protector will automatically be tripped thereby cutting off power to the motor Note The most common causes of such overloads are 1 Overworking the motor by attempting to remove too much material a single pass thereby causing an crease in power consumption and a spike in amperage draw 2 Anelectrical extension cord that is too long or not the correct gauge of wire which can also cause an increase in amperage draw If an electric extension cord must be used follow the instructions and refer to the chart in the electrical requirements section at the beginning of this manual 3 Overworked circuit caused by operating on a circuit that is close
16. amaged or badly worn 20 21 Do not push or force the workpiece into the sander Ihe machine will perform better and more safely when working at the feed rate for which it was designed Avoid working from awkward or off balance posi tions Do not overreach and keep both feet on floor Keep guards in place and in working order If a guard must be removed for maintenance or cleaning be sure it is properly re attached before using the tool again Never leave the machine unattended while it is run ning or with The power on Use of parts and accessories NOT recommended by General International may result in equipment malfunction or risk of injury Never stand on the machine Serious injury could occur if the sander is tipped over or if the sanding drums are unintentionally contacted Always disconnect the tool from the power source before servicing changing accessories or sanding belts or before performing any maintenance or cleaning or if the machine will be leff unattended Make sure that switch is in OFF position before plugging in the power cord Make sure the tool is properly grounded If equip ped with 3 prong plug it should be used with a three pole receptacle Never remove the Third prong Do nof use This sander for other than its inten ded use If used for other purposes General Inter national disclaims any real implied warranty and holds itself harmless for an
17. ches the gauge blocks Fig 6 7 Remove the gauge blocks and reinstall the sand ing belt on the rear drum See section Mounting a new sanding belt on page 18 The rear drum is now set lower than the front drum by the thickness of the sandpaper on the front drum 8 Given that the rear drum must be lower than the front drum only by the depth of the grit on the pa per and not by the thickness of the paper cluding the grit turn the micro adjustment screws clockwise approx 1 8 of a turn as per the indicator dials O This will raise the drum by the fraction corresponding to the depth of the paper without the grit Fig 7 Note You will not get an optimal result if the rear drum is not low enough On the other hand attempt ing to remove too much material in one single pass may result in workpiece burn problems or in motor overheating ing belts in any single pass Too much friction will cause belts to overheat and wear prematurely and in extreme A Do not use this sander as a thickness planer Never attempt to remove more than the depth of the grit of the sand cases may cause burns in the workpiece OPERATING INSTRUCTIONS CHECKLIST BEFORE STARTING Make sure to have on safety glasses as well as hearing and respiratory protection at all times when using the N sander Make sure you and any assistants are wearing safe appropriate workshop attire Roll up long sleeves secure long hair and
18. d if properly used and maintained will provide you with years of reliable service To ensure optimum performance and trouble free operation and to get the most from your investment please take the time to read this manual before assembling installing and oper ating the unit manual s purpose is to familiarize you with the safe operation basic function and features of this horizontal double drum sander as well as the set up maintenance and identification of its parts and components This manual is not intended as a substitute for formal woodworking instruction nor to offer the user instruction in the craft of woodworking If you are not sure about the safety of performing a certain operation or procedure do nof proceed until you can con firm from knowledgeable and qualified sources that it is safe to do so Once you ve read through these instructions keep this manual handy for future reference GENERAL INTERNATIONAL WARRANTY All component parts of General International machinery are carefully tested and inspected during all stages production and each machine is thoroughly inspected upon completion of assembly Because of our commit ment to quality and customer satisfaction General International agrees fo repair or replace within a period of 24 months from date of purchase any genuine part or parts which upon examination prove to be defective in work manship or material In order to obtain this warranty all defect
19. ding may be required BASIC ADJUSTMENTS AND CONTROLS CONNECTING TO A POWER SOURCE SWITCHES To avoid risk of shock or fire do not operate the unit with a damaged power cord or plug OFF m Replace damaged cord or plug immediately To avoid unexpected or unintentional start up make sure that both of the power switches on the sander are in the OFF position before connecting to a power source Once the assembly steps have been completed uncoil the power cord and plug it into an appropriate outlet refer back to the section entitled Electrical Requirements and make sure all requirements and grounding instruc tions are followed ON OFF POWER SWITCHES This sander is equipped with 2 different ON OFF power switches one magnetic switch for the drums motor and one switch with safety key for tne conveyor motor DRUM MOTOR MAGNETIC SWITCH This model 15 250 MI drum sander is equiped with a MAGNETIC SAFETY SWITCH located on the control box designed to protect the unit and the user from power surges power outages and unwanted or unin tentional start up The switch assembly is equipped with a GREEN START buton and RED spring loaded STOP button 3 Once ihe RED STOP button has been pressed the machine can only be started by turning the BLACK inner part of the button to the right to release the stop button Q CONVEYOR MOTOR SWITCH WITH SAFETY KEY SAFETY KEY PREVEN
20. elt clamp even with the belt properly wound onto the drum there may be slightly too much belt left at the right end of the drum This may cause a slight overlap on the last wrap on the drum and this despite installing the right end of the belt as far into the clamp as it will go In such cases to avoid having to unroll and realign entire belt on the drum after it has already been secured at both ends and is otherwise properly installed use a utility knife or scissors to cut and remove the overlapped section of paper To avoid belt tearing during sanding avoid cutting at right angles a rounded or curved cut 6 Release only first stage of the clamp sliding 7 Release the clamp This will bring proper ten your thumb down towards the bottom to lock the sion to the sanding belt tab in place 19 gt k _ P _ T L ar 4 T j 4 v 44m lt LL er n i i TP 2 S T 7 k s x A 2 Note With the sanding belt tab O properly inserted in the clamp the clamp assembly Q should not pull back more than 3 4 from the slot the drum Q If the clamp assembly pulls back further than 3 4 the sanding belt tab needs to be inserted further the clamp to remove some of the slack in the belt Otherwise the paper will not be properly tensioned on the drum and the may loosen unwind or p
21. ge on the front of the machine be used as a reference bu it is not intended for high precision measurements 2 setthe height of the conveyor table so that the work piece barely touches the front drum Note To avoid overworking the motor creating a potential circuit overload or damaging the sanding drums do not force the workpiece against or into the drums 11 12 conveyor speed ranges 3 to 20 FPM Feet Per minute Decrease Increase speed speed The feed speed adjustment knob Q is located on the control box on the right hand side of the machine o NY Turn the knob clockwise to increase the feed rate Turn the knob counter clockwise to decrease the feed rate As a general guideline more aggressive sanding using lower grits or sanding wider boards should be done at slo wer speeds and sanding using higher grits or sanding narrow boards can be done at higher speeds Given that sanding in successive grits is done in a single pass results can vary widely depending on a variety of fac tors Experiment with feed speeds based on the workpiece material board width depth of sanding grit selection as well as required finish results ADJUSTING THE HEIGHT OF THE REAR DRUM For optimal results the rear drum should be set fra ctionally lower than the front drum 9 by the depth of ihe grit of tne paper on the front drum Q front drum his factory set parallel
22. hould the motor require replacement remove 4 nuts washers and bolts on the bottom of the motor base and remove the entire motor assembly Fig 12 ADJUSTING THE PRESSURE ROLLERS The 3 pressure rollers front middle and rear main tain the workpiece on the conveyor belt preventing it from lifting up from the conveyor into drums Fig 13 They are factory set to provide a proper amount of downward pressure to the workpiece However with use and normal wear over time may eventually become necessary to make minor adjustments to the pressure rollers If you notice snipe which is a small depression in the surface of a workpiece across its width caused by a variation in the sanding depth during a given pass either at one or both ends of your workpiece pressure on the rollers must be reduced either by adjusting their height or tension Refer to the following symptoms to determine which pressure rollers need to be adjusted dfsnipe occurs at the beginning of the board reduce the amount of pressure on the front and or middle pres sure roller s Ifsnipe occurs at the tail end of the board reduce the amount of pressure on the middle and or rear pressu re roller s Increasing the amount of pressure is achieved by adjusting either the height or the tension of the pressure rollers In both cases some experimentation may be necessary to achieve an ideal adjustment
23. it 15 253 180 grit 15 257 100 grit 15 254 e 220 grit 15 258 16 You can also purchase them from your local tool abrasives or sharpening supply dealer You can find these ducts in most areas However we recommend that you choose higher quality brand name belts If the sanding paper is too thick or too thin or of inconsistent quality it may not be properly gripped by the two step clamps Tip Cleaning the sand paper with a belt dresser will extend the life of the sand paper Consult your local distributor For users who prefer to purchase abrasives in longer uncut rolls or from bulk suppliers the following cutting dia gram can be used to assist in cutting the bulk paper to the correct size for this sander DRUM SANDER PAPER DIMENSIONS MEASURED amp CUT WITH GRIT SIDE DOWN 24 DRUM SANDERS MODEL 15 150 amp 15 250 REMOVING THE SANDING BELTS Make sure the sander is disconnected from the power source before removing installing the sanding belts 1 To access the sanding belts unlock the drum co ver latch and open top cover The sanding belts are tightly wound around the drums and at tached at both ends by spring loaded clamps Fig 8 d T z j ii 2 Push the spring loaded clamps forward O and remove the tab of the sanding belt from the slot at the right end of the drum 9 Fig 9 and 10 3 Unwind the sanding belt then push the left two
24. ive parts must be returned freight pre paid to General International Mfg Co Lid Repairs attempted without our written authorization will void this warranty Disclaimer information and specifications in this manual pertain to the unit as it was supplied from the factory at the time of printing Because we are committed to making constant improvements General International reserves the right to make changes to compo nents parts or features of this unit as deemed necessary without prior of the unit with which it was supplied However special orders and after factory modifications may render some or all information in this manu al inapplicable to your machine Further as several generations of this 24 horizontal double drum sander and several versions of this manual may be in circulation if you own an earlier or later version of this unit this notice and without obligation to install any such changes on previously delivered units Reasonable care is taken at the factory to ensure that the specifications and information in this manual corresponds with that manual may not depict your machine exactly If you have any doubts or questions contact your retailer or our support line with the model and serial number of your unit for clarification Rules for S afe Operation To help ensure safe operation please take a moment to learn the machine s applications and limita tions as well as potential hazards General Interna
25. olid flat and stable floor that is able to support the weight of tne sander 5 0 16 259 kg and the operator Using the dimensions shown in Fig 2 as a guideline plan for placement within your shop that will allow the operator work unencumbered and unobstructed by foot traffic either passing shop visitors or other shop workers or other tools or machinery ESTABLISHING SAFETY ZONE For shops with frequent visitors or multiple operators it is advisable to establish a Safety Zone around shop machinery A clearly defined no go zone on the floor around each machine can help avoid accidents that could cause injury to either operator or the shop visitor It is advis able to take a few moments to either paint using non slip paint or using tape define on the floor the limits or perimeter of each machines safety zone Take steps to ensure that all operators and shop visitors are aware that these areas are off limits whenever a machine is running for everyone but the individual operating the unit ASSEMBLY INSTRUCTIONS For your convenience this sander is shipped from the factory partially assembled and requires only minimal assem bly and set up before being put into service Do not plug in or turn on the sander until you have completed the installation and assembly steps described in this section of the manual INSTALL THE CONVEYOR TABLE ELEVATION CRANK HANDLE 1 Install tne conveyor table adjustment crank han 2 Screw
26. ossibly tear when it comes in contact with the workpiece 8 Once sanding belts have been properly installed and tensioned on the drums close and lock the drum Cover DRUM MOTOR BELT REPLACEMENT The sanding drums are driven by two belts mounted on two pulleys powered by the motor If The belts become too loose due fo wear or if a breakage occurs you must replace one or both as needed Proceed as follows m lt Li 1 p 1 Unscrew and remove both left and right covers 2 With a 14 mm open end wrench loosen but do the front and rear panels 3 then the front and rear not remove the nut and lock located on shield plates 3 the motor positioning plate A N Proceed with caution Removing the belts from the pulleys will cause the motor to swing freely under it s own weight on the support shaft Do not let it drop Hold it until it is back down 3 Liftthe motor positioning plate This will loosen 4 Carefully remove the belts from the grooves on the the belts lower pulleys 5 Remove the belts from the upper pulleys and install new belts Fig 11 6 the motor and install the other end of the belts in the slot on the lower pulleys 7 motor back to its initial position then retigh ten the lock and lock nut located on the motor po sitioning plate REPLACING MOTOR Never attempt to repair motor yourself Contact a qualified technician s
27. remove any jewelry watches rings bracelets or anything that could become caught in the conveyor feed rollers or the drums potentially causing serious injury e Make sure a dust collector is properly attached e If multiple boards are to be sanded collect all workpieces together and set them nearby on a table or bench within easy reach e Make sure that the sanding belts are properly installed that is wound around the drums taut and without spaces between the belts edges Otherwise the sanding belts may rip when in contact with the workpiece e If working with longer workpieces make sure to have adequate out feed support safely set up and ready before sanding Tip To avoid sanding snipe which is a small depression in the surface of a workpiece across its width caused by a variation in the sanding depth during a given pass it is important to keep the workpiece level on the feed table until it has completely cleared contact with the sanding drums It is advisable to use an outfeed table or some form of out feed support when sanding workpieces of 4 or more in length Allowing the leading edge of a longer workpiece to hang or sag off of the outfeed end of the conveyor table should be avoided as it will lift the trailing end of the workpiece up into the sanding drums and cause uneven sanding depth and snipe m WITH AN ADEQUATE OUTFEED SUPPORT WITHOUT AN ADEQUATE OUTFEED SUPPORT 14 OPERATIONS STEP BY STEP To
28. run q test piece Though to check for snipe Continue adjusting the tension of the pressure rollers until you get more snipe on your board 22 RECOMMENDED OPTIONAL ACCESSORIES FOR YOUR SANDER We offer a large variety of products to help you increase productivity accuracy and safety when using your sander Here s a small sampling of accessories available from your local General International dealer For a complete list visit our website at www general ca NOTES Sanding belts 15 251 36 Grit 15 252 60 Grit 15 253 80 Grit 15 254 100 Grit 15 255 120 Grit 15 256 150 Grit 15 257 180 Grit 15 258 220 Grit Mobile base 50 025 Easily roll your sander any where in your shop Load capacity 500 Ibs Wheels lock when equipment is in use Gauge Blocks 30 040 Matching set of two pre cision aluminum gauge blocks Ideal for use in achieving parallelism adustments for drum sanders and planers Dust Collector We have a wide selection of dust collectors to suit all your shop needs Dust col lectors contribute fo a cleaner and more health ful workshop environment Flexible expandable 2 way roller stand Model 50 167S Ideal for use for infeed or outfeed support 20 wide height from 24 1 4 to 37 and length from 21 to 51 Four 4 high quality swivel casters with locking foot levers 300 Ibs load capa City
29. the knob into the threaded hole in the dle on the shaft located on the top left end of crank handle sander The slots in the crank handle must be aligned with the spring pin on the shaft INSTALL THE CONTROL BOX 1 Loosen but do not remove the 2 hex bolts in 2 Slide the control box onto the heads of the bolts stalled on the top right hand corner of the machine 3 Tighten the bolts to secure the control box in place with a 10 mm open end wrench Do not plug in the power cord yet Do not operate this sander without an adequate dust collection system properly installed and running Operating this sander without adequate dust collection can lead to equipment malfunction or dangerous situations for the operator or other individuals in the workshop 24 horizontal double drum sander is equipped with Be sure to use appropriate sized hose and fittings not two 4 diameter dust outlets on top of the machine included and check that all connections are sealed allowing for the connection to a dust collector not tightly to help minimize airborne dust included Note Recommended dust collection CFM requirements for this sander is 1200 CFM or 2HP dust collector If you do not already own a dust collection system consider contacting your General International distributor for information on our complete line of dust collection systems and accessories or visit our Web Site at
30. tional disclaims any real implied warranty and hold itself harmless for any injury that may result from the improper use of it s equipment Do not operate the sander when tired distracted or under effects of drugs alcohol or any medica tion that impairs reflexes or alerness working area should be well lit clean and free of debris Keep children and visitors at a safe distance when sander is in operation do not permit Them to operate the sander Childproof and tamper proof your shop and all machinery with locks master electrical switches and switch keys to prevent unauthorized or unsu pervised use stay alert Give your work your undivided attention Even d momentary distraction can lead serious injury Fine particulate dust is a carcinogen that can be hazardous to health Work in a well ventilated area and whenever possible use a dust collector and wear eye ear and respiratory protection devices Do not wear loose clothing gloves bracelets necklaces or other jewelry while the sander is in Operation Be sure that adjusting wrenches tools drinks and other clutter are removed from the machine and or The feed table surface before operating Keep hands well away from the sanding drums and all moving parts Use a brush not hands to clear away sanding dust Be sure sanding belts are securely installed on the sanding drums Do not operate the sander if the sanding betls are d
31. tne circuit breaker trips or the fuse blows regularly your machine may be operating on a circuit that is close to its amperage draw capacity However if an unusual amperage draw does not exist and a power failure still occurs contact a qualified Technician or our service department EXTENSION CORDS The use of an extension cord is not generally recommended for 220V If you find it necessary use only 3 wire extension cords that have 3 prong grounding plug and a matching 3 pole receptacle that accepts the tool s plug Repair or replace a damaged extension cord or plug immediately If you find it necessary to use an extension cord with your machine make sure the cord rating is suitable for the amperage listed on the motor D plate An undersized cord will cause a drop in line voltage resulting in loss of power and overheating The accompanying chart shows the correct size extension cord to be used based on cord length and motor I D plate amp rating If in doubt use the next heavier gauge The smaller the number the heavier the gauge TABLE MINIMUM GAUGE FOR CORD AMPERE VOMS TOTAL LENGTH OF CORD IN FEET RATING mow 25n sor 05m 95 MORE 2001 3 2008 24 HORIZONTAL DOUBLE DRUM SANDER 15 250 M1 CRANK HANDLE DUST OUTLETS CONVEYOR MOTOR START STOP SWITCH WITH SAFETY KEY CONVEYOR BELI SPEED ADJUSTING KNOB SANDING DRUM MOTOR MAGNETIC POWER SW
32. to ifs amperage draw capacity Make sure the circuit being used is capable of handling the amperage draw from this machine as well as any other electrical devices operating on the same circuit If you are unsure consult a qualified electrician To reset the overload protection switch after it has been tripped proceed as follows N To avoid unexpected or unintentional start up be certain that both of the power switches have been set to the off position before re setting the overload protection switch 10 SWITCHES OFF 1 Set both of the power switches on the sander to the off position and disconnect the machine from ihe power source Note If the sander is permanently connected fo a cir cuit hard wired set fhe wall panel circuit breaker or main circuit interrupter to the off position inc zed 3 Press the blue reset button Q RAISING LOWERING THE CONVEYOR TABLE 2 Unscrew 2 screws and remove the control box front cover 4 Reinstall and rescrew the control box cover 5 Reconnect the sander the power source 6 You can now restart the drum motor by pushing on the green button ON conveyor table can be raised or lowered as needed suit the thickness of the workpiece by rotating the crank handle O Fig 3 Note The maximum workpiece thickness capacity for this machine is 5 Never attempt to sand workpieces that are greater than 5 Note The depth gau
33. y injury which may result from that use ELECTRICAL REQUIREMENTS Before connecting the machine to the power source verify that the voltage of your power supply corresponds with AN the voltage specified on the 1 0 nameplate located on the back of the machine A power source with greater volt age than needed can result in serious injury to the user as well as damage to the machine If in doubt contact a qualified electrician before connecting to the power source This tool is for indoor use only Do not expose to rain or use in wet or damp locations GROUNDING INSTRUCTIONS In The event of an electrical malfunction or short circuit grounding reduces the risk of electric shock to the operator The motor of this machine is wired for 220V single phase operation and is equipped with 3 conductor cord and a 3 prong grounded plug to fit a matching grounded type receptacle Fig 1 DO NOT MODIFY THE PLUG PROVIDED If it will not fit your receptacle have the proper receptacle installed by a qualified electrician Check with a qualified electrician or service person if you do not com pletely understand these grounding instructions or if you are not sure the tool is properly grounded CIRCUIT CAPACITY Make sure that the wires in your circuit are capable of handling the amperage draw from your machine as well as any other machines that could be operating on the same circuit If you are unsure consult a qualified electrician If
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