I just purchased a used Di-Acro 14-72, 35 ton press brake. I'm very new to press brakes, this is my first time even using a press brake. I'm bending 18ga sheet at 50" long using a 3/8" V-Die, bending a 1" flange. I dialed in the machine so I'm getting a 90 degree bend, which is 90 on both length ends of the flange, but in the center, it's under bent by a couple degrees. Upon inspection, when I jog the machine down, I can see a very slight visible gap between the dies in the center when the ends of the dies are lined up. I replaced the top die, no change, replaced the lower die, no change. Granted all the tooling is used and came with the machine, but I don't think it's the tooling. As far as I can see, the machine has no adjustment for leveling the die.
Is there a common wear point on these machines that occasionally needs to be re-machined or replaced? Or is it somewhat common practice to use shims to level the tooling?
Is there a common wear point on these machines that occasionally needs to be re-machined or replaced? Or is it somewhat common practice to use shims to level the tooling?