Originally Posted by
Mark Hennebury
Brian, The machines originally operated with no air blowout and for the most part worked well. The problems would occur if you had dull chisels and a fast feed rate, the chips will clog up and compress rather than flying up and out, once they start to clog the gullet and pack up in front of the chisel, it gets nasty real fast. So, sharp chisels, the correct chisel stroke ( longer is better) a good fast speed (you have to experiment and get a feel for that) and your good, add in air blowout or air through the chisel and you are golden. As far as the feed; proper bleeding is essential. The regulator valve, is controlled feed open return, and sometimes an air control valve like was on yours. The thing that i found is the regulator valve has several turns of adjustment, and i only ever used about 1/4 turn range, so i would put a heavier oil in the control cylinders. that gives a smoother feed with a slightly slower return. But a better control over the usable range.