Hello Guest it is September 20, 2019, 02:07:28 AM

Author Topic: Mill or Turn?  (Read 3599 times)

0 Members and 1 Guest are viewing this topic.

Offline Davek0974

*
  •  2,577 2,577
    • View Profile
    • DD Metal Products Ltd
Re: Mill or Turn?
« Reply #200 on: May 27, 2019, 05:07:52 AM »
Its not encoder related as far as i can see  :(

I had a spare 600ppr encoder so wired that in and connected it by clamping in the spindle.

It still suffers the same fault, just slower as there are only 2,400 pulses instead of 10,000 per rev - the error count just goes up slower.

It still worked ok until 2980rpm.
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives

Offline Davek0974

*
  •  2,577 2,577
    • View Profile
    • DD Metal Products Ltd
Re: Mill or Turn?
« Reply #201 on: May 27, 2019, 08:59:00 AM »
Using my bench PSU at 10v it was giving 2965rpm one way and 2971rpm the other.

It was also creeping with the inputs shorted out.

I ran the auto zero speed set function which killed most of the creep.

Then adjusted the gain to 305rpm/V

It now gives 3000rpm forwards and backwards.

Did it fix the issue?

No :(


A short video of the Pid screen at 2990rpm and 3000rpm

https://youtu.be/i7GEe7jAoY4
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives

Offline TPS

*
  •  1,388 1,388
    • View Profile
Re: Mill or Turn?
« Reply #202 on: May 27, 2019, 03:11:49 PM »
Using my bench PSU at 10v it was giving 2965rpm one way and 2971rpm the other.

It was also creeping with the inputs shorted out.

I ran the auto zero speed set function which killed most of the creep.

Then adjusted the gain to 305rpm/V

It now gives 3000rpm forwards and backwards.

Did it fix the issue?

No :(


A short video of the Pid screen at 2990rpm and 3000rpm

https://youtu.be/i7GEe7jAoY4
as mentoined in Reply#120
anything is possible, just try it.
if you find some mistakes, in my bad bavarian english,they are yours.

Offline Davek0974

*
  •  2,577 2,577
    • View Profile
    • DD Metal Products Ltd
Re: Mill or Turn?
« Reply #203 on: May 27, 2019, 04:03:49 PM »
as mentoined in Reply#120

Of course, i'll butt out on this topic, apologies again.
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives

Offline Davek0974

*
  •  2,577 2,577
    • View Profile
    • DD Metal Products Ltd
Re: Mill or Turn?
« Reply #204 on: May 28, 2019, 06:20:07 AM »
I know I have stopped this thread due to it being against rules but was hoping to add one more entry for closure - might help someone in the future.

I think I have fixed it :)

Two parameters -

PN020 - Motor rated speed - this is set by default motor settings
PN051 - Motor Max Speed - this is a user adjustable one

PN051 Max was set at 3000 - i had tweaked this before but not the other one as it's a default setup one.

I have now set both to 3050rpm and away she goes :)

My working theory is that the controller was calling for 3000 but the drive was maxing out somewhere around 2990 - where it faulted so it was stuck in an endless fault loop - controller saying "I want more” and the drive saying “you can't have it”

Short video…

https://youtu.be/ksGlgcCWO4s

I think it makes sense??

No idea about tuning yet but that is not for the mach Forum, thanks for all your patience on this one guys :)
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives

Offline Hood

*
  •  25,849 25,849
  • Carnoustie, Scotland
    • View Profile
Re: Mill or Turn?
« Reply #205 on: May 28, 2019, 07:43:06 AM »
I think TPS actually meant post 119 rather than 120, he mentioned about 2950rpm being the max at 10v. nothing to do with post 120 so I wouldn't worry about that :D

Good to hear you have it running, it is always the things like that that are a headache, had similar nightmare  with the VFD on the lathe, somehow it changed itself to be looking for a serial command connection rather than a voltage command and it took ages for me to work out why it wasn't working :D

Offline Davek0974

*
  •  2,577 2,577
    • View Profile
    • DD Metal Products Ltd
Re: Mill or Turn?
« Reply #206 on: May 28, 2019, 08:00:48 AM »
Ah that's good to know, I know talking about other products is frowned upon so will keep it minimal ;)

Yes, oddly though it still faulted when i set the max rpm to 2950 but at least its happy now.
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives