Home
AWEBDS610 Belt & Disc Sander
Contents
1. Code 501258 AWEBDS610 Belt amp Disc Sander Hole assembly instructions including floor stand le td y SR e Floor Stand Code 100234 Axminster Tool Centre Unit 10 Weycroft Avenue Axminster Devon EX13 5PH axminster co uk Index of Contents Page No Index of Contents 02 Declaration of Conformity 02 Optional Accessories 03 What s in the Box 03 04 General Instructions for 230V Machines 04 05 06 Assembly 07 08 Specification 09 Parts Identification and Description 09 10 11 12 13 14 Raising the Linisher to Vertical 15 Changing the Sanding Belt 16 Tracking the Belt 17 Changing the Sanding Disc 17 Maintenance 17 Optional Floor Stand Assembly 18 19 20 Parts Breakdown Llst 21 22 Notes 23 Declaration of Conformity Copied from CE Certificate manufactured by Oingdao Capital Resource Electric Co is in compliance with the following standards or The undersigned F Mocking authorised by standardisation documents in accordance with Council Qingdao Capital Resource Electric Co Ltd PIE 155 Zhuzhou Road Qingdao Shandong 266101 PR China declares that this product m IC 2006 95 EC 2002 96 EC Model number Belt amp Disc Sander BDS610 EN 61029 1 2009 Wa rn i n The symbols below advise that you follow the correct g safety procedures when using this machine O O O CO A Fully read manual Ear protection Eye protection Dust mask Two Man HAZARD and safety instructi
2. Do not dispose of electric tools together with household waste material In observance of European Directive 2002 96 EC on waste electrical and electronic equipment and its implementation in accordance with national law electric tools that have reached the end of P their life must be collected separately and returned to an environmentally compatible recycling facility
3. fig 22 Set the belt about the centre of the linishing table and reset the tension by pressing the lever toward the tracking drum end of the machine See page 18 for instructions on how to track the belt Fig 19 i Ad d K j I Unscrew the knurled knob amp star Lift the strut plate and dust handled bolts to remove the work deflector clear stop plate amp strut Linishing belt Release the belt tension by pulling Slide the belt off the machine the lever toward the tracking drum Fig 22 Direction of travel SEE Belt Overlay Belt Underlay A 16 Glue Joint Tracking the Belt A Disconnect the machine from the mains supply NOTE1 All directions are given from the vievv point of the operator standing behind the drive drum end looking down the length of the machine The tracking control works as follows turning the tracking adjustor clockwise will track the belt to the left anti clockwise will track the belt to the right DO NOT make large adjustments and remember the belt may take some time to react to your alteration Little by little is a good maxim to observe when carrying out tracking operations NOTE2 NOW here you can wear a glove Using your hand roll the belt towards the drive drum end check that the belt stays in the middle of the table if not adjust the track control slightly and move the belt again continue until the belt runs down the centre of the linishing table When you are comfortable that the bel
4. surface of the machine that supports the belt and maintains See fig 10a it in plane during sanding operations The platen itself is impregnated with a medium to reduce friction therefore heat and scuffing abrasion of the belts This aids the smooth passage of the belt and increases its longevity Motor Unseen The motor is housed in the chassis body A pulley and drive belt Unseen connect the motor shaft output to the pulley on the drive drum NVR start stop The NVR Start Stop buttons beneath the quick action stop shroud buttons Standard marking with T indicating Start and O indicating Stop See fig 9d Ventilation Preformed ventilation grills fitted to the chassis body to allow air to be grills ducted to the motor for cooling Ensure that the grills are not covered See fig 10 during operation or that they do not become clogged Drive belt cover A moulded plastic cover that guards the drive belt It must be removed to See fig 10 effect the changing of the drive belt Drive drum This is the drum that provides the belt movement It is fixed to the chassis and is referenced to the platen and is the reference against which the tracking drum works in order to maintain the tension and the linear motion of the belt The drive drum axle fits through a mandrel around which the swivel joint of the linisher can be rotated See fig 10a 09 Parts Identification and Description ua Swivel mandrel Belt ten
5. he adhesive surface Mitre fence and apply CAREFULLY to the disc use a piece of cloth in your hand or wear a glove to firmly press the abrasive to the disc You don t have to go mad pressing the sanding disc down now the application can be reinforced by a gentle sanding action across the face when you first use the new sanding disc Locate the work stop plate for the linisher and fit to the anchor strut using the M6 countersunk bolts washers and knurled knobs provided as shown in fig 8 Clear away any odds and sods bits and pieces etc Make sure you have read and understood the rest of the manual Square Work stop plate 08 Specification Model AWEBDS610 Product Code 501258 Rating Hobby Power BOOW Belt Speed 517m min Belt Size 150 x 1 220mm Diameter of Disc 254mm Table Size Disc 365 x 200mm Dust Extraction Outlet 62mm Overall L x W x H 620 x 560 x 480mm Weight 47kg Parts Identification and Description Chassis This is the main body of the machine all the other components are See fig 9 mounted onto the chassis Linisher body This is the long flat box that carries the linishing belt it is mounted on the See fig 10 chassis via a swivel joint about the drive axle It mounts the tensioning tracking drum and the various mechanisms for applying tension to and tracking of the belt It also mounts the platen which is the support and planar reference for belt Linisher platen This is the flat
6. iciently abrasive to carry out the work you intend Sanding belt cleaning sticks are an efficient method of prolonging the life of the belts and discs and will also maintain their operating performance Check that the belts or discs are undamaged edges pick up on the workpiece and will cause the medium to tear often very rapidly with accompanying sharp flapping edges Always offer the workpiece to the belt disc so that the motion carries the work against the restraining surface i e the work stop or the table use the left hand side of the disc Do not press too heavily against the sanding surface all this will do is slow the sander down Remember sanders work by removing small particles of material quickly and heavy pressure works adversely to the cutting process further it will accelerate the rate of clogging of the abrasive surfaces rendering the machine less efficient If you are attempting to sand inside curves over the tracking drum do not press at all other than to keep the workpiece in contact with the surface any pressure could upset the tracking geometry As there is no cushioning effect to the belt passing around the drum expect an added vibration and compensate for it Sanding of certain types of timber may make the fitting of dust extraction mandatory in order to comply with the directives of the HSE However even if it is not mandatory it is strongly recommended that you consider fitting dust extraction It will ce
7. isher table either to its vertical stops or to the position required See fig 17 and re tighten the swivel mandrel bolt After use remember to refit the dust deflector or the dust will shoot out straight off the end of the m c To remove the dust deflector unscrew Dust defector removed the two screws amp washers Fig 17 Fig 16 Using a 6mm allen key loosen the swivel mandrel locking bolt Raise the linisher to the required angle amp re tighten the swivel mandrel locking bolt 15 Changing the Sanding Belt econ the machine from the mains supply Remove the workstop plate and strut by unscrewing the knurled knob on the end of the pivot bar and the two star handled bolts See fig 18 lift the strut plate and dust deflector clear See fig 19 place all components aside carefully Unlock the swivel mandrel locking bolt amp raise the Linisher slightly so it is clear of the horizontal stops then clamp down the bolt Release the belt tension by pressing the lever toward the tracking drum end See fig 20 Slide the belt off the machine See fig 21 Inspect the new belt ensure that there are no tears or rips especially along the edges check the direction arrows on the inner surface of the belt and fit accordingly The direction of the arrows on the belt surface against the linisher platen should point to the drive drum Note If you are using an old belt and the arrow marking has worn off check the direction of travel as in
8. ith the belt PS don t forget don t leave the spare belts discs in the damp either Keep the work area as uncluttered as is practical this includes personnel as well as material Under no circumstances should CHILDREN be allowed in work areas Specific to Sanding machines A Warning The sanding disc can not be declutched from the belt and vice versa both functions are active when the machine is running Remember this and do not leave loose objects of any description on the machine if it is going to be used Once the sander is mounted carry out any setting operations mitre tilt and remove all tools used in the setting operations if any and place safely out of the way If you are working long lengths of material arrange for extra support beyond the boundary of the machine and check you have sufficient room to manoeuvrer the material through all the operations you will wish to carry out It is good practice to leave the machine unplugged until work is about to commence also make sure to unplug the machine when it is not in use Always disconnect by pulling on the plug body and not the cable After fitting a new sanding disc it is good practice to lightly sand across the left side of the disc with a reasonable sized 20mm x 50mm piece of timber to make sure the sanding disc is correctly seated on the disc The sanding action will press the sanding disc firmly back against the disc itself It is not good practice to wear gl
9. l it achieves its linear track See fig 10b This is the lever that controls the tensioning spring which acts on the tracking drum Pushing the lever towards the drive drum end will slacken the tension push the lever the other way to re apply the tension This is a flat metal plate fastened to its mounting strut as shown in the fig 10 The mounting strut looks a complicated arrangement but is in fact a simple solution to provide a robust structure utilising light weight construction The mounting strut must be removed in order to replace the belt The mounting strut also provides an anchor for the dust deflector This is the flat belt that is driven along the linishing platen to provide the long wide flat abrasive surface upon which the majority of sanding is carried out Belts of different abrasive types and loadings are available This is the mounting for the clench joint of the linisher the joint can be slackened off to allow the linisher to be tilted up to and including the vertical The dust extraction port is moulded in to the chassis cover directly below the dust deflector over the drive drum The lower section of the chassis is accessed by the extraction port so the resulting draught will remove the dust from the disc sander and also encourage airflow past the motor A 10 inch alloy disc mounted on the end of the drive drum axle It can mount a wide range of abrasive types and grits A good sized table pivoted in trunnio
10. ly is mounted on a T bar which engages in the slot machined in the table It is capable of being turned through 60 There is a large aluminium facing plate that can be fixed to the mitre fence to provide a greater bearing surface There is a hinged carrying handle on one side of the sander The other side is a handle grip moulded into the chassis of the sander Please read the Instruction Manual prior to using your new machine as well as the operating procedures for your new machine there are numerous hints and tips to help you to use the machine safely and to maintain its efficiency and prolong its life Keep this Instruction Manual readily accessible for any others who may also be required to use the machine 13 Parts Identification and Description Aluminium fence plate A T bar oat re Slot Mitre fence Fence plate Fa clamping knobs M d 1 P Mitre fence en clamp Scale i NN A NS A5 i 1 A NV NM buuliiu nm 14 Raising the Linisher to Vertical If you require to raise the linishing table to the vertical using the 6mm Allen Key provided loosen the swivel mandrel locking bolt See fig 16 It is suggested that you also remove the dust deflector by removing the two screws amp washers See figs 14 amp 15 so that the dust will be driven down straight down to the rear of the dust extraction port Put the screws washers amp cover safely aside Raise the lin
11. ns The table has a T slot machined into it parallel to the front edge to allow the mounting of the mitre fence attachment The underside of the front edge of the table is bevelled so that the table can be tilted down without fouling the sanding disc These are the handed castings bolted through to the chassis that mount the table 11 Parts Identification and Description Linisher platen Tracking drum Linishing belt Work stop plate Mounting strut Drive drum Linisher body Drive belt cover Carrying handle Ventilation grills 1 D Tracking adjuster Drive belt cover removed showing the drive belt amp pulley system Disc table support brackets See fig 9 Disc table bracing struts See fig 9 Mitre fence See fig 12 Carrying handle amp moulding handle grip See fig 9 amp 10 A Parts Identification and Description These are the handed castings bolted to the table they have the pivoting spigots that engage in the trunnions to allovv the table to tilt Tvvo open quadrant struts each pre mounted to the table through a svvivel joint The quadrants have a graduated scale stamped into them which allows for the table to be set to a known angle There is an index pointer on the left trunnion that reads against the scale The bracing struts are clamped at their lower ends by star handled bolts and washers through to a threaded boss in the foot of the trunnion casting The mitre fence assemb
12. ons before use should be worn should be worn should be worn Assembly Motor gets hot 02 What s in the Box Ouantity Item Model Number Model Number BDS610 1 No Belt amp Disc Sander Sanding Belt Fitted Product Code 501257 1 No Sanding Disc Table with Bracing Struts attached 1 No Righthand Side Disc Table Trunnion 1 No Lefthand Side Disc Table Trunnion 1 No Righthand Side Disc Table Support Bracket 1 No Lefthand Side Disc Table Support Bracket 4 No M6 Pan Head Machine Screws 4 No M6 Hex Head Bolts 2 No M6 Star Handled Bolts and Washers 1 No Work Stop Plate for the linisher 2 No M6 Countersunk Bolts 2 No M6 Knurled Knobs and Washers 1 No 6mm Allen Key 1 No 4mm Allen Key 1 No Mitre fence Fixture and T bar 1 No Mitre Fence Plate 2 No Star Handled Nuts 1 No 254mm Diameter Self Adhesive Sanding Disc 1 No Instruction Manual Optional Accessories 1 No Belt amp Disc Sander Floor Stand Product Code 100234 4 No Legs 2 No Short Rails 2 No Long Rails 2 No Short Stretchers 2 No Long Stretchers 1 No Packet Containing 24 No M6 Coach Bolts 24 No Large 6mm Washers 32 No M6 Nuts 8 No Small 6mm Washers 4 No M6x90 Hex Head Bolts 03 What s in the Box Having opened the box remove all the components stowed in the packaging Place these carefully to one side Remove the top packaging and lif
13. oves whilst sanding as one tends to lose the feel of the workpiece sander contact but obviously this removes the safety barrier between your fingers and the sanding surface Remain focused and exercise caution whilst sanding DO NOT sand very small pieces of work with bare hands try to construct some form of holder Make sure you are comfortable before you start work balanced not reaching etc If the work you are carrying out is liable to generate excessive grit or dust or chips wear the appropriate safety clothing goggles masks etc If the work operation appears to be excessively noisy wear ear defenders If you wear your hair in a long style wearing a cap safety helmet hairnet even a sweatband will minimise the possibility of your hair being caught up in the rotating parts of the tool likewise consideration should be given to the removal of rings and wristwatches if these are liable to bea snag hazard Do not work with cutting abrasive tools of any description if you are tired your attention is wandering or you are being subjected to distraction A deep graze a lost fingertip or worse is not worth it Do not use the machine within the designated safety areas of flammable liquid stores or in areas where there may be volatile gases There are very expensive very specialised machines for working in these areas THIS IS NOT ONE OF THEM 05 General Instructions for 230V Machines Check that sanding surfaces are still suff
14. r helical 5mm Pan head Screw M5x8 Pan head screw M5x16 Switch housing Na volt switch Bearing spacer w bearing Bearing cap Socket head screw M amp x10 Drive drum Cover switch housing Pad 254mm dia Sandpaper Screw pan cross M6x12 Disc support sanding disc Tapping screw M4x12 Disc guard Disc shroud Hex nut M6 Pan head screw m6x16 Mount table support Table support Table Dust collector Pan head screw M5x16 Clamp handle Handle Pan head screw M5x16 no oester Cast Base Motor cover Safety guard sanding belt lower Pan head screw M5x8 Thread M6x145 Rubber sleeve Support stem Lock base sander belt Motor Hex head screw Lock washer Drive pullay Countersink washer Flat cross screw M5x10 Pulley cover Timing belt Drive pulley Flat head screw M5x25 Bearing support Lock plate sander plate Hex socket cap screw MBx25 Retaining ring 15mm Ball bearing Drive shaft Pan head screw M5x16 Rubber washer Tension lever Lever spacer Rubber washer Index spring Rubber bushing Retaining ring 12 mm Ball bearing Idler drum Idler shaft Drum guide Index spring Power cord w plug D shape rubber bushing Notes 23 LAY Please dispose of packaging for the product in a responsible manner It is suitable for recycling ox Help to protect the environment take the packaging to the local recycling centre and place into the appropriate recycling bin Only for EU countries
15. rtainly reduce the level of dust and grit and as it helps to remove the waste more quickly will certainly prolong the longevity of the abrasives Above all OBSERVE make sure you know what is happening around you and USE YOUR COMMON SENSE 06 Assembly In order to reduce the footprint of the machine for packaging several items are dismounted from the machine and need to be re affixed Please locate the disc table trunnions and identify them as left and right handed do likewise with the disc table support brackets Identify them as left and right hand Locate the 4 off M6 Pan Head Machine screws Loosely screw the table trunnions to the chassis as shown in fig 1 Offer up the left hand table support bracket fig 2 and introduce from the outside one of the star handled bolts with a washer through the graduated bracing strut screw the bolt into the threaded boss at the foot of the trunnion this is to effectively act as a third hand whilst you are fastening the table to the table brackets introduce the spigot of the table bracket into the trunnion and set the support barrack approximately level fig 3 Repeat for the other side Locate the M6 Hex head bolts set the table on the support brackets and Manoeuvre the table and the brackets until you can fit the bolts through the brackets into the table screw in loosely fig 4 When all screws and bolts are fitted proceed to tighten up all screws and bolts commencing with
16. sion lever Knurled knob Star handle bolt Dust deflector Dust extraction port Carrying Chassis handle Disc table trunnion Disc table bracing strut 10 Aluminium fence plate Disc Disc table table support Emergency brackets stop Off Disc On Fig 9d NVR On Off switch Tracking drum See fig 10a Tracking adjustor Tensioning lever See fig 9 Work stop plate and mounting strut See fig 10 Linishing belt See fig 10a Swivel mandrel See fig 9 Dust extraction port See fig 9 Disc See fig 9 Disc table See fig 9 Disc table trunnions See fig 9 Parts Identification and Description This is the idler drum mounted on the linisher body that supports the other end of the belt and provides the tension to the belt that enables the drive drum to drive it The tension is provided by an expansion spring within the linisher body The spring can be compressed by a lever arrangement to enable the belts to be changed The axis of the drum can be altered to allow the belt to be tracked along the platen The axis of the tracking drum is established by the dead end of its axle resting in the bottom of a slotted bracket and the live end being driven up or down an anchored thread which acts as the Tracking Adjustor The anchored thread is turned by a star knob handle which will tilt the axis positive or negative causing the belt to move to the left or right unti
17. t frayed worn or loose Replace all guards and covers etc Reconnect to the supply and start up the machine check that nothing has disturbed the tracking 17 Optional Floor Stand Assembly Overview The stand is rectangular in shape The Belt Disc Sander sits on the stand with the front of the machine above the narrower side of the rectangle Assembling the stand Locate and identify the 4 legs the rails A and the stretchers for the stand B and the packet containing the coach bolts washers and nuts The rails are almost symmetrical angle strips the rails have 2 holes punched in one face 2 at each end and are slightly shorter than the corresponding stretchers The rails also have 2 holes one at each end in the adjacent face to accept the bolts for mounting the machine The stretchers are almost asymmetric angle strips both the long and the short stretchers have 2 holes punched in one face one each end Identify the two shortest rails and the two shortest stretchers Assemble the two short end frames for the stand Bolt the components together by putting the coach bolt through the leg through the rail or stretcher secure with washer and nut Tighten the nut only finger tight at this time See fig 1 When the two end frames have been assembled select one turn it upside down on a flat surface and loosely bolt the long side rails and stretchers C in place attach the other side frame keep the in
18. t is tracking in one line reconnect the mains supply and switch the machine ON Be prepared to carry outa small adjustment to the original setting as the belt being driven can generate slightly different dynamics to the belt being hand turned Changing the Sanding Disc Lift the edge of the disc and gripping firmly peel the disc away from the plate turning the plate as required to free all the disc Remove and throw away If you have been extremely fortunate all the adhesive will have been removed with the disc As this is rarely the case be prepared to rub scrape pick etc to remove all the odd patches of adhesive and render the plate CLEAN Fit the new sanding disc as detailed in the instruction Assembly Maintenance A Disconnect the machine from the mains supply There is very little mechanical maintenance that can be carried out on the machine Most prudent maintenance is preventative and concerned with keeping the machine clean Remove the belt and check there is no dust or resin build up on the drums or at the edges of the platen At reasonable intervals remove the ventilation grills inspect the interior of the chassis remove all dust resin build ups and blow the motor clean Remove the lower sanding disc guard the dust deflector and the extraction port moulding remove any build ups and clean them thoroughly to allow the dust to travel over their surfaces smoothly Remove the drive belt cover and check that the belt is no
19. t the machine out of the box using the lift up handle at the motor end and the moulded hand grip in the other and place upon a clear flat surface taking care not to trap or pinch the power cable under the chassis Remove any other items from the box Having unpacked your sander and its various components if you do not wish to retain the packaging please dispose of it responsibly especially any polystyrene most of the rest of the packaging is biodegradable Please read though the Section entitled Identification and Description of parts of the Sander as this will ensure that you better understand the terminology we will use during the assembly and setting up phases General Instructions for 230V Machines Good Working Practices Safety The following suggestions will enable you to observe good working practices keep yourself and fellow workers safe and maintain your tools and equipment in good working order KEEP TOOLS AND EQUIPMENT OUT ui WARNING OF THE REACH OF YOUNG CHILDREN Mains Powered Tools General Disc amp Belt Sander Primary Precautions These machines are supplied with a moulded 13 Amp Plug and 3 core power cable Before using the tool inspect the cable and the plug to make sure that neither are damaged If any damage is visible have the tool inspected repaired by a suitably qualified person If it is necessary to replace the plug it is preferable to use an unbreakable type that will resist damage on site Onl
20. terleaving of the top surfaces of the rails the same See fig 2 i e if the top face of the narrow end of the stand rail is above the top face of the long side keep it the same on both sides and both ends When all the components are assembled using the flat surface as a reference tighten up all the nuts Check that the mounting holes for the machine are lined up introducing one of the bolts or a screwdriver shaft during 18 tightening can prevent misalignment Upright the frame See fig 3 Bolt the machine to the stand using the M6x90mm hex head bolts by pushing the washered bolt through the chassis through the stand and securing with a washer and M6 nut use another M6 nut to lock the first in place See page 6 Optional Floor Stand Assembly 19 Optional Floor Stand Assembly 501258 Belt Disc Sander Two Man Assembly M6x90mm hex head bolt y Small 6mm washer M6 Nuts 100234 Stand N WARNING The Belt Disc Sander is a heavy piece of equipment You are advised to seek help or the use of some form of lifting device hoist engine crane etc before you attempt to lift or move this machine 20 Parts Breakdown LIst Parts Breakdown List 22 E No Description is I go DD CQ D BE WwW MM Sanding belt 152x1219mm Bed Knob Washer Wing screw Sunk head screw M6x16 Work table for belt Work support sander belt Lock pin work support Wing nut M6 Lock washe
21. the Pan head screws then the hex head bolts Tighten gradually and swing the table whilst you are tightening remember the table has to tilt up and down after all the tightening is complete Do not over tighten the bolts remember the table is a casting Loosely screw the table trunnions to the chassis Star handled bolt Fig 5 Disc table bracing strut 07 M6 hex bolt Tighten up all screws and bolts Assembly Set the table to 90 according to the graduated scales on the bracing struts and the index marker Use a known 90 reference square and check that the table is set correctly to the disc fig 6 If it is not reset the table until it is correct and then reset the index marker to the scale on the bracing strut fig 6a 90 Square Index marker Star handled bolt Fit the mitre fence to the slot in the table set square and check that the face of the mitre fence is perpendicular to the disc fig 7 If it is not loosen the table fixing bolts and slew the table until it is correct Take care to leave sufficient gap between the table edge and the disc to fit the abrasive disc Re tighten the bolts Clean the surface of the disc with a degreasing cleaner methylated spirit acetone nail polish remover borrowed from the female side of the family if you don t have a proprietary cleaner Allow to dry off and wipe over with a clean dry cloth Locate Table slot the sanding disc peel the cover from t
22. y use a 13 Amp plug make sure the cable clamp is tightened securely Fuse at 13 Amp It is also good practice to use switch outlets If extension leads are to be used carry out the same safety checks on them and ensure that they are correctly rated to safely supply the current that is required for your machine This machine is intended primarily for inside workshop usage Work Place Environment Always mount the machine on a flat level stable surface There are several methods of achieving this bolting the machine directly to a good solid workbench bolting the machine to a sturdy base board that can be clamped to the good solid workbench create an independent entity by bolting the machine to its own stand However you mount your machine make sure it is fastened down and stable before use Paper belts and discs do not respond well to wet or damp conditions In the worst case the adhesives holding the belt and the abrasives fail completely the belts fall apart and the abrasive becomes a soggy mess against the edge of your work piece Try to keep the machine ina reasonably dry warm environment If this is not possible if the machine is to remain unused for some time at least remove the belt put in a plastic bag and store in a warm dry place 04 General Instructions for 230V Machines I m afraid can offer no suggestions for the disc unless you have upgraded to some form of velco fastening method in which case do the same as w
Download Pdf Manuals
Related Search
Related Contents
Manuel d`utilisation Faltrad 20" ZEMO ML UM UK.indd Télécharger L`approche processus, mode d`emploi controller manual PC-PACK ANALYZERS - All Canon PIXMA iP110 Manual for Windows MITSUBISHI Copyright © All rights reserved.
Failed to retrieve file