Mill Tramming Head using DTI's

thingiverse

Check out my YouTube Channel at https://www.youtube.com/user/JBFromOZ Tramming the cutting head of a Mill to the table can be a time consuming task, and one that involves a lot of contortion to look through the back of a single dial gauge. By using two "like" gauges, in a beam, a single point is used as a start point reference, setting both indicators reading the same at that point. Once both indicators measure the same height at the same point, the beam is turned along or across the table to measure the offset from vertical of the mill head. adjustment is made as appropriate to bring both dials to read the same value, and levelling the head. In some cases using a larger diameter fly cutter, the leading edge of the fly cutting is desired to be fractionally lower than the trailing edge, to eliminate back cutting on the return path across the work. This can be seen in the second picture where the left/right alignment shows the left side half a thousandth lower, and the right side shows half a thousandth higher. a couple of M3 cap head bolts and nuts are required to finish the item. Print Settings Printer: TrinityLabs Aluminatus Rafts: Doesn't Matter Supports: No Resolution: 0.3mm layer heights Infill: 20% How I Designed This drawn up in OpenSCAD to suit measured diameter of the two gauges I had on hand. Parametric design used so that you can set up as you require. the outer pair of holes is for the widest part of the mill bed, next set to tram up our 6 inch vice, and the closest pair to tram up our smallest vice.