Search found 14 matches

by cwatson1982
Thu Jul 23, 2020 2:31 am
Forum: Hardware Interface Issues
Topic: MPG knob inputs
Replies: 5
Views: 271

Re: MPG knob inputs

I switched the MPG control switches to 5v and over to the kanalog opto inputs. Everything is stable and functioning properly now. Even was able to use the old pre-run shielded cable and a distribution block I had laying around for grounds. Next will be pots for speed over rides and mounting it all.....
by cwatson1982
Wed Jul 22, 2020 5:39 pm
Forum: Hardware Interface Issues
Topic: MPG knob inputs
Replies: 5
Views: 271

Re: MPG knob inputs

The machines existing wiring is still all in place as it was before the retrofit (other than the operator console and pendant wiring). Everything is star grounded. The kmotion products and the PC are on their own 120v circuit that is completely separate from the machine circuit (other than the mount...
by cwatson1982
Wed Jul 22, 2020 1:55 am
Forum: Hardware Interface Issues
Topic: MPG knob inputs
Replies: 5
Views: 271

Re: MPG knob inputs

I tentatively might have found the cause, if not the solution. My e-stop circuit is 24v, removing the MPG e-stop switch from the circuit seems to have stopped the selector switch bits from going crazy. I have another switch mounted to the console so if I can't find the underlying issue I may just no...
by cwatson1982
Wed Jul 22, 2020 12:14 am
Forum: Hardware Interface Issues
Topic: MPG knob inputs
Replies: 5
Views: 271

MPG knob inputs

Hi, I picked up one of the typical cheap 6 axis MPG's. I wired the A/B signals to my kanalog and wired the rest of it to JP6 per the various examples out there. My issue is that the selectors bits are all randomly bouncing high causing multiple axis to attempt to move and jerky motion. With just the...
by cwatson1982
Sun Jun 28, 2020 2:23 am
Forum: Miscellaneous
Topic: Random weird feedhold
Replies: 3
Views: 148

Re: Random weird feedhold

Thanks! It looks like the soft limits were in fact the issue with the spindle. I had them set at +-1e+09, I changed them and ran the job again in the air with no issues. The Z axis I will have to monitor and see if I can get the problem to repeat. The max following error is 400 counts for that axis ...
by cwatson1982
Sat Jun 27, 2020 1:37 am
Forum: Miscellaneous
Topic: Random weird feedhold
Replies: 3
Views: 148

Random weird feedhold

So I finally got my post processor up to speed and was running my first real job today. After a couple of hours of running, I got a feedhold in the middle of an operation. I could not turn it off via click. So I stopped the job, checked the console and saw nothing. I tried to restart the job and cou...
by cwatson1982
Mon Jun 08, 2020 6:11 pm
Forum: C Programs
Topic: Rigid Tapping - depth is short and retract overshoots
Replies: 10
Views: 605

Re: Rigid Tapping - depth is short and retract overshoots

The drives on this system (including the spindle drive) all run their own configurable velocity loop. The drives themselves have adjustments for velocity gain and velocity integral as well as their own filtering. So anything done to the inner velocity loop has a pretty big effect on the PID values i...
by cwatson1982
Sun Jun 07, 2020 5:27 pm
Forum: C Programs
Topic: Rigid Tapping - depth is short and retract overshoots
Replies: 10
Views: 605

Re: Rigid Tapping - depth is short and retract overshoots

I installed VMWARE and Windows XP on my laptop so I could use the drive software. It looks like the c-axis mode changes the drives velocity integrator (doubles it) and also changes the electronic "gearing", reducing the ratio from .053 to .018. I believe this is how it scales analog input voltage an...
by cwatson1982
Sat Jun 06, 2020 1:10 am
Forum: C Programs
Topic: Rigid Tapping - depth is short and retract overshoots
Replies: 10
Views: 605

Re: Rigid Tapping - depth is short and retract overshoots

P: .1 I: 0.00005 D:0 VFF: 0.0025 The I gain is small with a small integrator (50). Anything higher and it dithers at rest pretty badly regardless of what else is changed and sounds odd at higher RPM's. Any higher P with or without D results in run away when stopping/reversing. As it is I can get dow...
by cwatson1982
Fri Jun 05, 2020 11:19 pm
Forum: C Programs
Topic: Rigid Tapping - depth is short and retract overshoots
Replies: 10
Views: 605

Re: Rigid Tapping - depth is short and retract overshoots

Yep, it completely changes the drives internal tuning :cry: Would it be possible to just re-set up the channel within the tap program and then switch back when tapping is over if I can't just run it in "c-axis" mode full time?