Motor missing steps

[Gansen911]

I have a Bridgeport Series 1 mill that I have put a acorn control on using Gecko driver (G203v) and Centroid stepper motors (MAE1350). Attached are some pictures and documentation of the motors.

The problem I am having is the motors missing steps if I run to fast. I run 10ipm now just because I know I am safe at that speed. If I ramp it up to say 20 -30 it will miss steps when running a part. Manually jogging the machine at 50imp it does not seem to ever miss steps. In the acorn wizard I have my max rate (turns/in. or rev/deg) set to 50, slow jog to 10, Accel/Decel to .5 , and Drive Enable Delay set to 250. Is there a setting that is wrong and needs to be set differently to run faster feed rate? Or is this a limitation of the stepper motors that I am using?

Thanks - Matt

[cnckeith]

https://www.geckodrive.com/support/step-motor-basics

[Gansen911]

Thanks for the reply.

I have read through some that the info on Geckos site but still not understanding what I need to do to resolve my issue. I spoke with gecko and they think it could be the Centroid steppers that I am using. I am hoping that's not the case and I have a setting set wrong. Could this be?

[cnckeith]

Section 6: Power Supplies The choice of a power supply is determined by the voltage, current, and power supply type (i.e. switching versus linear, regulated versus unregulated, etc.). By far the most problematic and complicated factor is voltage, which will be discussed last. The easiest factor in…

tell us about the power supply you are using.

[Gansen911]

I have a An Tek power supply. Attached are the pictures of it and the Rectifier description from there web site.

[cnckeith]

how do you have the motors wired to the drives? if you can only do 10ipm and then lose steps sounds like you have the motor wire phases mixed up.

[Gansen911]

Here are pictures of the motors and drives and the motor wiring diagram. Thanks again for any help, I got this machine the motors were wired already.

[Gansen911]

The fact that I can jog around at 50ipm with out skipping steps, I am thinking this could be something other than a wiring problem possibly?? I am using fusion 360 for the post processer, could it be something on that side? In the setup wizard I have my Max at 50, Fast at 50, and Slow at 10. If it was a rapid movement that is skipping steps, that is only at 50ipm.

[cnckeith]

does the skip steps happen on one axis or all of them?

[Richards]

I found this website that seems to match your motors: https://elektronik-lavpris.dk/files/use ... 729373.pdf
Page STP 22 seems to match your motor.

You'll note from the steps-per-second chart that the motors are slow. The "knee" on the torque curve is around 1000 steps per second. Using a standard 200-step per revolution drive, you would only get 5-revolutions per second. I've used the G203 drives extensively, but never with large, slow motors. Those drives require 2,000 steps per revolution. Because the normal 200 steps per revolution are micro-stepped with ten divisions between full steps, torque is substantially lowered.

If that manual matches your motors, you should consider replacing the motors.