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Author Topic: One stepper Motor Acting Up  (Read 1574 times)

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Re: One stepper Motor Acting Up
« Reply #10 on: October 05, 2017, 11:20:54 PM »
> #2 motor connected to #1 or #2 driver motor runs one direction and smooth.
Good test.
Just checking: can #2 motor run in BOTH directions from either driver?

> #1 motor connected to #1 or # 2 driver runs but with vibration also can change direction by jogging on keyboard.
How very odd. I still say it won't be the motor itself. They just are not built that way.
Have you checked the connector on the motor cable? If one wire has a shaky connection, that MIGHT explain it. Maybe.

Cheers

Offline Daner

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Re: One stepper Motor Acting Up
« Reply #11 on: October 05, 2017, 11:54:56 PM »
The 4 wires going into the motor look good.
The 4 pin connector looks good.
I will check the wire harness between the motor and the driver next

Thanks for your help

Danny

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Re: One stepper Motor Acting Up
« Reply #12 on: October 06, 2017, 02:58:11 PM »
Yes you were right!
It was 1 wire of the 4
Broke off the soldered joint
It's like a new machine now
Beers on me
Thanks for your help.

Danny
Re: One stepper Motor Acting Up
« Reply #13 on: October 06, 2017, 03:50:52 PM »
We win some ...  :)

Cheers
Roger
Re: One stepper Motor Acting Up
« Reply #14 on: October 07, 2017, 12:17:12 AM »
Hi,
that's good news. Excepting the rotor there are no moving parts in a stepper, it ought to be possible to make such simple devices without
fault. Roger was quite right to smell rat.

The only real quality issue I can think of that would separate good from not so good is insulation resistance, and not just the normal static tests
but the ability to withstand high voltages at elevated temperature working conditions for years at a time.
I bought Vexta 5 phase steppers for my mill and paid a real high premium for them. I wondered after I had committed to buy whether it was justified.
I also use Vexta drivers, they are 230V input with a switch mode supply to the driver.  The DC link voltage is 150V. This is the highest voltage
I've ever heard of for a stepper motor. Whether the premium I paid is justified I'm glad that Vexta quality is such that their motors withstand those
voltages under working conditions and have done for four years.

Craig
My wife left with my best friend...
     and I miss him!
Re: One stepper Motor Acting Up
« Reply #15 on: October 07, 2017, 12:58:05 AM »
Better add bearing quality to the list, plus quality of machining of the teeth.

Cheers
Roger