Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: krigby on October 04, 2023, 09:57:17 AM

Title: Out of control axis when using MPG
Post by: krigby on October 04, 2023, 09:57:17 AM

After weeks or troubleshooting and tons of support from Artruro Duncan, I have my lathe working, mostly.  Just one small issue I need some help with.

I can jog both axes using continuous mode and the X and Z + and - keys.  It works flawlessly.

But then I switch to MPG mode and move the handwheel even one click in either direction, the axis will run away.  I can't stop the motion except by hitting the estop.

What am I missing?

Huge shoutout to Artruro, BTW!  He has been great.

Title: Re: Out of control axis when using MPG
Post by: Graham Waterworth on October 04, 2023, 08:46:26 PM

We need more details about the software and the control.

Title: Re: Out of control axis when using MPG
Post by: krigby on October 05, 2023, 07:53:30 AM

Graham,
This is my setup, please let me know if there is something else that would be helpful.  All of the boards and the MPG came from CNC4PC:
PC running Windows 7
2 Startech PCI parallel port cards.
Port 1 is connected to a C10 BOB which is in turn connected to two DM556 stepper drivers
I have two home switches wired in parallel connected to pin 15 on the C10.
Port 2 is connected to a C22 board, which is in turn connected to an MPG2 pendant.
In Mach3 I enabled port 2 and set pins 2-9 as inputs

Title: Re: Out of control axis when using MPG
Post by: Graham Waterworth on October 06, 2023, 10:49:07 AM

Have you followed this :-

https://cnc4pc.com/blog/post/setting-up-mpg234-over-lpt2-using-mach3 (https://cnc4pc.com/blog/post/setting-up-mpg234-over-lpt2-using-mach3)

Title: Re: Out of control axis when using MPG
Post by: krigby on October 06, 2023, 11:05:07 AM

yes.   I think I know what is going on and I believe it is a problem with the parallel port card.  They have been troublesome all along.  As of this moment, and it could change, I believe I will buy a UC400ETH from CNCDrive and use that in place of the parellel cards.

Title: Re: Out of control axis when using MPG
Post by: krigby on October 06, 2023, 02:29:14 PM

upon further investigation it looks like the UC400ETH won't work for me because both ports are configured to be primarily output signals.  Instead I am looking into a Warp9 ESS, specifically the B-ESS.