Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: gldfshrdr on January 27, 2022, 02:29:41 PM

Title: Steppers run one direction only for all Axis......
Post by: gldfshrdr on January 27, 2022, 02:29:41 PM

Hi! I,ve been working off and on with this for ~6 months. No success. Please see my system below.

Win 10, Mach3 (3 axis mill), ESS smoothstepper, C25S BOB (CNC4PC), HY DIV-268N 5A drivers. 4 wire NEMA 23 motors and 36V P.S.

The problem is with all axis. The on screen jog and Gcode entry do the same. Wiring has been debugged. driver tests show 5V one direction and 0V the other. Current draw is ~50ma one way and 0ma the other measured DIR+ to DIR-.
Uninstall and reinstalled Mach 3....no help.

I really need a solution.  

Thanks......dt

Title: Re: Steppers run one direction only for all Axis......
Post by: TPS on January 28, 2022, 07:43:42 AM

is your wiring simular to this:

https://www.cnc4pc.com/pub/media/productattachments/files/jinan2ess_1.pdf

some photos of your wiring would be helpful.

Title: Re: Steppers run one direction only for all Axis......
Post by: gldfshrdr on January 28, 2022, 09:17:19 AM

Yes. I ignored the AC side. I already found one error in it and suspect the rest.

Thanks.....dt

Title: Re: Steppers run one direction only for all Axis......
Post by: gldfshrdr on January 28, 2022, 10:14:39 AM

Hopefully I've done this right. please see the pic below.

Title: Re: Steppers run one direction only for all Axis......
Post by: TPS on January 28, 2022, 12:49:41 PM

wiring looks ok.
you have configured for Motor outputs X-Axis
step -> pin 2 port 1
dir -> pin 3 port 1 ?

can you measure  5V 0V at dir terminal on stepperdriver depending on direction?

Title: Re: Steppers run one direction only for all Axis......
Post by: gldfshrdr on January 28, 2022, 01:02:05 PM

yes to wiring. I can see the change from 5v to 0v between DIR+ and DIR- when changing direction. Also, the Y axis did reverse, but only twice and then not again.

Thanks.....dt

Title: Re: Steppers run one direction only for all Axis......
Post by: TPS on January 28, 2022, 01:07:13 PM

and you are 100% sure about the motor wires A+A- B+B- ?

Title: Re: Steppers run one direction only for all Axis......
Post by: gldfshrdr on January 28, 2022, 02:21:08 PM

No I'm not sure of the motor wiring. Do you have a suggestion for testing that?

Thanks.....dt

Title: Re: Steppers run one direction only for all Axis......
Post by: gldfshrdr on January 28, 2022, 03:22:37 PM

Searching more on the internet I found two references to motor wiring. So I swapped the B+ and B- wires on X axis. Now it runs reverse but won't run the other direction, only in reverse. The motor sounds better though.
 Also found reference to connect DIR+ to 5v rather than DIR- to common? Now I'm really confused!

Oh, and thanks for your help TPS.......dt

Title: Re: Steppers run one direction only for all Axis......
Post by: joeaverage on January 28, 2022, 04:47:30 PM

Hi,

Quote

Also found reference to connect DIR+ to 5v rather than DIR- to common? Now I'm really confused!

I have told you several times on the Warp9 forum to try swapping the Dir+ and Dir- wires....have you tried it?

Craig

Title: Re: Steppers run one direction only for all Axis......
Post by: gldfshrdr on January 28, 2022, 05:19:46 PM

Yes I did. It didn't fix the problem and the motors would not run.

thanks......dt

Title: Re: Steppers run one direction only for all Axis......
Post by: TPS on January 29, 2022, 02:50:50 AM

have you checke motor wires with ohmmeter

A+/A-  and B+/B- should have the same resistance.