(Models 31-250, 31-255X) PART NO. 406-13-651-0021 - 06-19-03 Copyright © 2003 Delta Machinery To learn more about DELTA MACHINERY visit our website at: www.deltamachinery.com. For Parts, Service, Warranty or other Assistance, please call 1-800-223-7278 (In Canada call 1-800-463-3582).
SAFETY GUIDELINES - DEFINITIONS This manual contains information that is important for you to know and understand. This information relates to protecting YOUR SAFETY and PREVENTING EQUIPMENT PROBLEMS. To help you recognize this information, we use the symbols to the right. Please read the manual and pay attention to these sections. Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
FAILURE TO FOLLOW THESE RULES MAY RESULT IN SERIOUS PERSONAL INJURY. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. FOR YOUR OWN SAFETY, READ THE INSTRUCTION MANUAL BEFORE OPERATING THE MACHINE. Learning the machine’s application, limitations, and specific hazards will greatly minimize the possibility of accidents and injury. USE CERTIFIED SAFETY EQUIPMENT. Eye protection equipment should comply with ANSI Z87.1 standards, hearing equipment should comply with ANSI S3.
ADDITIONAL SAFETY RULES FOR DRUM SANDERS FAILURE TO FOLLOW THESE RULES MAY RESULT IN SERIOUS PERSONAL INJURY. 1. DO NOT OPERATE THIS TOOL UNTIL it is assembled and installed according to the instructions. 2. OBTAIN ADVICE from your supervisor, instructor, or another qualified person if you are not familiar with the operation of this tool. 3. FOLLOW ALL WIRING CODES and recommended electrical connections. 4. COVER POWER TAKE-OFF SHAFT when not using accessories.
POWER CONNECTIONS A separate electrical circuit should be used for your machines. This circuit should not be less than #12 wire and should be protected with a 20 Amp time lag fuse. If an extension cord is used, use only 3-wire extension cords which have 3prong grounding type plugs and matching receptacle which will accept the machine’s plug.
EXTENSION CORDS Use proper extension cords. Make sure your extension cord is in good condition and is a 3-wire extension cord which has a 3-prong grounding type plug and matching receptacle which will accept the machine’s plug. When using an extension cord, be sure to use one heavy enough to carry the current of the machine. An undersized cord will cause a drop in line voltage, resulting in loss of power and overheating. Fig. D, shows the correct gauge to use depending on the cord length.
DRUM SANDER PARTS CAUTION TAG CAUTION: Pay close attention to caution tags attached to this machine and follow these instructions precisely. This machine is heavy. Remove the container from around the machine. DO NOT lift it from the container. Carefully unpack all loose items from the shipping container and cut the carton from around the machine. CARTON CONTENTS 1 2 7 4 5 6 8 10 3 CAUTION: TAGS 1. 2. 3 4. 5. 6.
ASSEMBLY FOR YOUR OWN SAFETY, DO NOT CONNECT THE MACHINE TO THE POWER SOURCE UNTIL THE MACHINE IS COMPLETELY ASSEMBLED AND YOU READ AND UNDERSTAND THE ENTIRE INSTRUCTION MANUAL. ATTACHING LEGS This machine is heavy. Use two or more people when lifting. 1. With the machine on its back, resting on the two wood blocks (not supplied), attach the legs. (Fig. 1). NOTE: The legs are universal but the mounting hole pattern is different front to rear. See (A) Fig. 2A and Fig. 2B. 2.
ATTACHING AND LEVELING FEED TABLE 1. Remove the front and rear shipping bolts that were installed to stabilize the support plate during transit. These bolts, one shown at (N) Fig. 5, should be removed before attaching table. Use a ½" wrench to hold hex stop post (S) then with another ½" wrench loosen and remove hex bolts (N) NOTE: DO NOT remove the hex stop post (S) Fig. 5. 2. The abrasive belt and the motor for the feed table are shipped assembled. Place the feed table (A) Fig.
OPERATING CONTROLS AND ADJUSTMENTS STARTING AND STOPPING THE MACHINE 1. The drum motor on/off switch (A) Fig. 12 is located underneath the switch shield (B). To turn the drum “ON”, move switch (A) to the “ON” (up) position. B 2. To turn the drum “OFF”, push down on switch shield (B) Fig. 13. NOTE: This switch only controls the drum. See “TABLE FEED/SPEED SWITCH” for feed table switch instructions. A Fig. 12 B Fig.
RAISING AND LOWERING THE FEED TABLE A To raise the feed table, turn the handwheel (A) Fig. 16 counterclockwise. To lower the feed table, turn hand-wheel, (A) Fig. 16 clockwise. NOTE: Each 1/4 turn of handwheel (A) will increase or decrease the height of the table by 1/64". CHECKING AND ADJUSTING FEED BELT TRACKING AND TENSION Fig. 16 IMPORTANT: READ THIS COMPLETE SECTION BEFORE MAKING ANY ADJUSTMENTS TO BELT TRACKING OR TENSION. TRACKING DISCONNECT MACHINE FROM POWER SOURCE.
CHECKING AND ADJUSTING TABLE PARALLEL TO DRUM NOTE: The table to drum parallelism (D) Fig. 18 has been set at the factory. Distance (D) should be the same front to back over the entire width of the feed belt. It is best to measure the board thickness at several places along the length and width to ensure parallelism. To check and/or to adjust parallelism (D) follow the steps below. 1. To check if the feed table is parallel with the drum cylinder, sand a wide board (B) Fig.
3. Use a 9/16” socket with an extension (not supplied). Place it in one of the two holes where the hole plugs were removed. Loosen one hex bolt, then the other to relieve tension on the motor. (One is shown at (D) Fig. 26). Apply upward pressure on the motor (located under the machine) to relieve tension on the belt. Replace or change the belt positions on the pulleys. IMPORTANT: When the belt is on the inner pulleys (F) Fig. 26, the sanding drum speed is 3300 SFM.
REMOVING AND REPLACING FEED BELT DISCONNECT MACHINE FROM POWER SOURCE. 1. Disconnect the DC Motor Quick Connect. (see Fig. 10). 2. Use a 1/4" hex wrench to remove the four table mounting screws, lockwashers and flange nuts , two of which are shown at (A) Fig. 32. 3. Remove the table, and place it on a firm supporting surface. 4. Loosen the two socket head set screws (D) Fig. 33A and Fig. 33B equally at each side of the table until tension is relieved on roller (E).
FREQUENTLY ASKED QUESTIONS WHAT FACTORS AFFECT SANDING OPERATIONS? A. SANDING BELT GRIT 1. 36 grit – Used for very aggressive stock removal, glue removal, or for sanding rough boards. Leaves a rough finish. 2. 60 grit – Used for heavy stock removal and rough surfaces, and for truing warped material. Leaves a rough finish. 3. 80 grit – Used for general purpose sanding, stock removal, surfacing, and rough finishing. Leaves a marked finish. 4. 120 grit – Used for minimal stock removal and for finishing.
WHAT CAUSES BURN MARKS Burning the wood can be caused by several things. We suggest checking for; sanding belt overlap on the drum wrap, sanding paper loading up, too much stock removal with too fine a grit paper, too slow a feed rate, and dull or worn sand paper. WHEN DO I MAKE TABLE HEIGHT ADJUSTMENTS FOR MATERIAL REMOVAL? Locate the handwheel on the right side of the machine. To raise the table, turn the wheel counter-clockwise. To lower, turn the wheel clockwise.
HOW DO I SAND GLUED BOARDS? 1. Glue the boards as flat as possible at the outset. 2. Remove excess glue from the top and bottom before it dries. 3. Use a coarse belt for initial stock removal (36 to 60 grit). 4. Run the board at different locations over the entire length of the drum to prevent glue build-up on the sanding belt. 5. After glued joints are cleaned, change the sanding belt to an 80 grit. Work your way to the finer grit until you are satisfied with the result.
TABLE MOVEMENT TROUBLESHOOTING GUIDE In the event your table will not adjust properly, or is tight when adjusting up and down, or the timing belt is jumping teeth, this guide provides the information necessary to realign the table mechanism and adjust the belt tension. DISCONNECT THE MACHINE FROM POWER SOURCE BEFORE SERVICING, MAKING REPAIRS, OR WHEN CHANGING ACCESSORIES. The Drum Sander feed table should adjust up or down with 35 in-lbs. of torque or less.
from turning and tighten the socket head screw(B) with the 3/16" hex wrench. 4. With the support plate level, try moving the table up and down. 5. If the movement is still tight, go back through this procedure before going to the next step of CHECKING LOCK NUT ADJUSTMENT. B STEP 3 - CHECKING LOCK NUT ADJUSTMENT P 1. At the base of three of the elevating screws there is a ¾" lock nut (B) Fig. 41. Under this nut is a thrust washer, thrust bearing, and another thrust washer. [See (T) Fig. 41].
MAINTENANCE MAKE CERTAIN THE MACHINE IS DISCONNECTED FROM THE POWER SOURCE BEFORE PERFORMING MAINTENANCE PROCEDURES. 1. Periodically clean or vacuum the feed belt. 2. Periodically clean the sawdust from sanding cylinder cavities. 3. Oil all bushings on the feed table rollers and front and rear pressure rollers. 4. Oil thrust bearings on feed table screws [See (T) Fig. 41.] BRUSH INSPECTION AND REPLACEMENT CAUTION: BEFORE INSPECTING BRUSHES, DISCONNECT THE MACHINE FROM THE POWER SOURCE. A B Fig. 42 Fig.
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ACCESSORIES A complete line of accessories is available from your Delta Supplier, Porter-Cable • Delta Factory Service Centers, and Delta Authorized Service Stations. Please visit our Web Site www.deltamachinery.com for a catalog or for the name of your nearest supplier. Since accessories other than those offered by Delta have not been tested with this product, use of such accessories could be hazardous. For safest operation, only Delta recommended accessories should be used with this product.
PORTER-CABLE • DELTA SERVICE CENTERS (CENTROS DE SERVICIO DE PORTER-CABLE • DELTA) Parts and Repair Service for Porter-Cable • Delta Machinery are Available at These Locations (Obtenga Refaccion de Partes o Servicio para su Herramienta en los Siguientes Centros de Porter-Cable • Delta) ARIZONA Tempe 85282 (Phoenix) 2400 West Southern Avenue Suite 105 Phone: (602) 437-1200 Fax: (602) 437-2200 CALIFORNIA Ontario 91761 (Los Angeles) 3949A East Guasti Road Phone: (909) 390-5555 Fax: (909) 390-5554 San Leandro