Guru
Joined: 26/09/2020
Location: AustraliaPosts: 677
| Posted: 09:10am 17 May 2026 |
Hi Poida the stepper controller was set for 4.3 amps when it arrived, it is a kit from aliexpress that has all the parts to automate the lead screw.
The gearing was wrong from the stepper motor to the lead screw for my lathe so I removed the pulleys and belt and have used gears instead.
I don't know what voltage is being sent to the motor as I haven't measured it.
It turned out that the problem I was having was I was using too fast a spindle speed for coarse threads and the controller didn't like it. The motor was hammering and not running well .
I tried with the spindle speed lower and it works great. So the encoder must be telling the control panel that the speed is wrong for that threading pitch.
Anyway it is working great now and I have fine tuned the travel so that the threading is accurate. I did some 28tpi threads today and they are spot on.
It is great to be able to use the lathe for threading now. I was given it and the fellow who gave it to me lost the back gears, so an electronic lead screw was the answer.
thanks for the help. I did up the current setting to 5.6 amps but tomorrow I will put it back down. There is no current rating on the nameplate of the motor. They are basically chinese compies of NEMA stepper motors.
cheers
Pete