28
28
Clamping Beam Pressure Adjustments
Test clamping pressure by placing a small strip about 4” from each end of the brake, and closing
the clamp. Check to make sure the clamping pressure is enough to keep the material from
slipping and no more.
IMPORTANT:
Excessive clamping pressure can “pre-load and permanently
distort the brake.
To increase the clamping pressure, follow the steps below: (fig. 20)
1. Back off locknuts “
B
” and “
D
”.
2. Turn adjusting bolt “
A
” ccw (
counterclockwise
) to back off about
1/16” from the square slider shaft.
3. Turn bolt “
C
” ccw (
counterclockwise
) until the square slider shaft
pushes against the bottom of bolt “
A
”.
4. Retighten locknuts “
B
” and “
D
” and check the clamping pressure.
Repeat the above steps for more clamping pressure.
5. To decrease the clamping pressure, reverse the above adjusting
bolt procedure. (Use the measuring gauge to keep track of the
material thickness.)
Set Back / Radius
“Set back” is how far the front edge of the fingers are from
the inside edge of the apron (fig. 21). The amount of setback
depends on the thickness of the material to be formed.
•
For most applications, adjust the finger setback with the
formula: “Setback” = material thickness x 1.2. This will
help keep the material from tearing when the bend is
made. For 16 ga. (.062”) or heavier material, it may be
desired to adjust the setback up to 2 times the material
thickness to achieve the desired results.
•
To make the adjustment, loosen the setscrews on both ends of
the machine as indicated with the arrow in (fig. 22). Turn the
hand wheels to adjust the “Set back dimension” along the full
length of the clamping beam. First move the fingers back,
passed the desired “set back”, and then forward to remove any
slack. Double check that the clamping pressure is minimal.
•
Re-tighten the two setscrews and double check the setback
distance.
figure 22
Set back
Distance
figure 21
figure 20
A
B
C
D
0
1
10 ga.
(.1345)
