Delta 31-250 Instruction Manual download pdf (Page 18)

STEP 1 - TENSION ON TIMING BELT

1. The timing belt should be checked for the correct

tension. If the belt is too tight, the table will be difficult to

move. A loose timing belt may cause the belt to jump a

tooth on the timing gear. Deflection in the middle of the

long span should be 2 - 3 lbs to deflect the belt to the

outside frame wall.

2. To adjust the timing belt tension, first loosen the

tension. To do this, find one of the timing belt idler rollers

under the right hand end of the unit between the timing

gears, and with a ½" wrench loosen the screw (the nut

for this screw can be seen on the topside of the base).

Do not rotate table-elevating handwheel

while the belt tension is relaxed.

3. With the ½" wrench still on the idler screw under the

unit, push the slack of the belt toward the column end of

the unit, and tighten the screw. Be careful

not to over-tighten the nut, because it might crush the

spacer inside. Approximately 50 in-lbs. of torque will be

sufficient. To be certain that the spacer is not damaged,

grasp the idler roller. If it can be moved approximately

1/8" vertically, the spacer is all right.

4. With the proper belt tension try to adjust the table.

STEP 2 - CHECKING THE TABLE

SUPPORT PLATE

1. The table support plate must be mounted in a flat

plane and parallel (D) Fig. 38 to the drum. Check this with

the table mounted to the support plate. Use a 3/16" hex

wrench and ½" open end wrench to loosen the four hex

screws that attach the support plate to the elevating

screws. Place a block of wood (W) Fig. 37, metal, etc.

approx. ¾" wide x 2" to 3" tall, under the table support

plate, on the unit base next to one of the elevation

screws. Turn the elevating screw up or down until the

support plate barely clears the block. REPEAT the

clearance check at each of of the other three elevation

screws. They should be within 1/64" of each other [See

(O) Fig. 40].

2. While holding the ½" hex on the screw, to prevent it

from turning, retighten the four hex screws.

3. With a ½" wrench and a 3/16" hex wrench, loosen

the front right socket head screw (B) Fig. 38 four full

turns[See (S) Fig. 39]. Turn the elevating screw clockwise

until it no longer touches the plate (P) Fig. 39. Then turn

the same screw counterclockwise until it just touches the

support plate without raising it (O) Fig. 40. Hold the

elevating screw(L) Fig. 38 with the ½" wrench to keep it

TABLE MOVEMENT TROUBLESHOOTING GUIDE

Fig. 38

Fig. 37

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. If more torque is required, then

an adjustment may be needed. If you hear a clicking or knocking noise as you turn the handwheel, the timing belt is

most likely jumping teeth and an adjustment will be needed. Below are the four areas that most affect the table

movement. Start at the top of this trouble-shooting guide and check the first item before proceeding to the next. Once

the table movement frees up there is no need to proceed through the remaining steps.

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 24

Comments to this Manuals

No comments

Delta 31-250 Instruction Manual Page 18

Comments to this Manuals

Related products and manuals for Power sanders Delta 31-250