1.Repeat “Tension Roller Alignment” except raise the sanding drum only 1/4 turn of the height adjustment handle.
2.If both tension rollers are causing snipe then tighten all four hex nuts (E, Figure 24) at this position.
3.If only outfeed tension roller causes snipe, only tighten rear (outfeed) hex nuts on each end of drum at this position, then raise sanding drum another 3/4 turn of the handle.
4.Press infeed tension roller down to rest on conveyor bed and tighten front (infeed) hex nuts at this position.
This process sets the tension roller assembly at an angle providing less tension pressure on the outfeed roller.
Drum Height Control Adjustment
If the height control mechanism does not operate easily or smoothly, or there is excessive vertical movement or deflection of the drum carriage, perform the following adjustments.
1.Tighten all four lock nuts (A, Figure 26) and then loosen them 1/8 to 1/4 turn. If the lock nuts are set too tight, height control will not operate easily. If the lock nuts are too loose, excessive deflection of the outboard end of the drum carriage will result.
2.Thoroughly lubricate the mating surfaces of the motor mount slide (B, Figure 26), and the height adjustment screw (C, Figure 26).
Figure 26
Operation
Before using your drum sander, review the previous pages in this manual on initial
Basic Operating Procedure
1.Set depth of cut.
2.Start dust collection system.
3.Start drum.
4.Start conveyor and select feed rate.
5.Feed stock through machine.
To feed stock through the sander, rest and hold the board to be sanded on the conveyor belt, allowing the conveyor belt to carry the board into the drum. Once the stock is halfway through, reposition yourself to the outfeed side of the machine to receive and control the board as it exits.
Setting Depth of Cut
Adjusting the drum sander for the proper contact between the abrasive and the stock determines the depth of cut. The depth of cut is controlled by the height adjustment handwheel.
It may take some experimentation to determine the proper depth of cut, given the variables of abrasive grit, type of wood, and feed rate. For best results, use scrap wood to practice sanding and to develop skill and familiarity with the machine before doing finish work.
A combination of several variables will determine the proper depth of cut to use, including the following:
1.Abrasive type and grit size.
2.Width of the piece being processed.
3.Hardness of the piece.
4.Feed rate of the conveyor belt.
Establishing Proper Drum Height
A good rule of thumb when sanding with grits finer than 80 is to place the stock to be sanded under the drum and lower drum until it contacts the stock. Drum should still rotate by hand. Without changing drum height, finish feeding the stock under the sander.
Start sanding drum and sand the stock at that same position.
Do not start drum while in contact with stock!
For sanding with grits coarser than 80, you can raise the conveyor table slightly.
Always maintain control of stock. Through practice you will learn the proper depth of cut considering the variables above.
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