Help!
I have a Chinese 2.2kw spindle that is new and I fear it’s defective.
I have used it a little to do custom signs for friends and some 2.5D art. Recently I decide to build myself a router bit holder, easy enough. I designed in Aspire and made the g-code. I then took the g-code and cut it out using MACH3. I sanded, stained and varnished it. ALL the holes I cut are larger than I designed them to be. ALL of them, and here’s the ironic part, they are not all the same size (where they’re supposed to be).
I went back today and recalibrated all the axis 4 times (2 in each direction) they’re and were spot on. I then cut a .2500” hole with a .25EM (Lakeshore Carbide) and a .6500” hole with the same bit. Measured them 2x and got .3051 for the .2500” hole and .7106 on the .6500” hole. I repeated the process on the .2500” hole this time turning on the spindle and just using PGDOWN key trying to rule out MACH3. I must have measured the hole 7 or 8 times with 2 different calipers and landed on a reading of .3050 for this experiment.
I think my spindle is “out of round” but I do not know how to check it. Any ideas on this?