Stepper motor problem

Author	Message
Godoh Guru Joined: 26/09/2020 Location: Australia Posts: 677	Posted: 07:28am 16 May 2026       Hello Bryan, thanks for the reply So the encoder pulse was set that way when I got the gear. The kit came with toothed belts and pulleys and the setup was already programmed in. I did check the rotation and yes as best as I can see the chuck is reading right for a 360 degree rotation on the degree setting. Now I am totally new to all this stuff, so how do I measure the lead screw pitch ? The stepper pulse on the controller was already set at the 1200 setting so I have just left it that way I am fairly sure the lathe is metric, but there are adjustments on the controller to cut metric, imperial or custom threads. I have cut some 28 tpi threads with it and they appear to be pretty good. The lead screw setting is the one I have changed to get the tool carriage to move the correct distance when I run the machine. I tried heaps of settings up and down until I got the one that moved the tool carriage the right distance. So the 1.44 setting for the lead screw is the one that lets me cut threads and machine automatically accurately. This is the first time I have ever played with stepper motors, and I know nothing about them. I can measure the lead screw pitch but am not sure if I need to measure the gap between the screws or what. Thanks Pete