find index gear sets too small to reach?
CPC-HOB selects suitable index gear sets based on index gear NDP and center-to-center (C-C) distance between fixed index gear shafts. These are user-specified values entered for each machine in CPC-HOB’s Hob Machine List. If C-C distance is too small, or if the NDP entered is smaller than actual index gear pitch, then CPC-HOB thinks smaller size gearsets will fit together on the machine. If the index gear pitch is correct, but CPC-HOB’s gear sets occasionally do not reach, increase C-C distance by 5-10%. This will cause CPC-HOB to reject those gear sets that would theoretically reach when in-line, but the machine’s index swing arm doesn’t permit mounting gears in a straight line. Both C-C distance and index pitch are accessed from the Browse & Edit option in the Hobbing Machine Constants screen. Some suggestions when hobbing plastic, nylon, or TufPoly: Plastic melts easily when cutting causes too much friction. Therefore plastic and nylon like a very sharp cutter. Also, high feed rates
