Centroid Community CNC Support Forum

That would do it unless you run the Wizard again - it may put them back in if you define those I/O as limits or home/limits in the wizard.

Setting them to 0 broke home and the ability to run my program. I already had the Wizard set up with only home switches, eStop, and probe defined. All other inputs are set to unused.

Rick

I was able to generate the same limit messages by placing a slug of steel on one of the home switches. These are NPN output feeding optos. I guess if the noise spike was large enough and the hardware fast enough, it might catch a spike.

I do understand that just because I generated the same message doesn't mean I simulated the problem. In any event, why does triggering a home switch cause a limit tripped event? I do have my home switches at the extremes of my travel but couldn't they be anywhere?

Rick

Without a report, I can't tell if your plc inputs are still be assigned as limits.

Though they can often be assigned to the same switch/plc input. A LIMIT and a HOME or 2 entirely different things.

I'm going to be away from my CNC for a little while so will pick up this mystery ASAP.

Thanks for all of your help,

Rick

Hi, did you ever figure this out? I am having the same issue when using a spindle under load

I am attaching a report. Hope it helps.

I can't confirm it quite yet, but I think I may have narrowed it down to some faulty x & z limit switches (under heavy vibration from spindle). I found that if I strike the Z axis with my hand, it triggers the limit notif in centroid for either the x or z axis. I have ordered some vibration resistant limit switches which will arrive in 2 and 5 days from now.

In the meantime, is there an easy way to disable limit switch fails mid-part-cutting-code? To be honest, I have no need for them once I am done homing. Plus, it would be a good thing to be able to test.

Thanks in advance.

Jengrlinla,
hello. thanks for posting the report. the message log shows lots of Z+ limit tripped notifications. so i'd guess that is where the issue it.
it is a common problem to have a Z axis switch trip due to vibration. many users are getting good results from these inexpensive prox switches which are vibration resistant. https://amzn.to/2KjwDqA

if you want to disable the switch after homing, 1.) home the machine.. 2.) carefully jumper the switch input (if using NC switches) or pull the wire from the input if using NO switches. this is a crude but effective way of doing it. Be sure to have the software travel limit set correctly. be sure not to short anything out while doing this with the power on.

also. looking at your settings from the report.zip file.. i see some odd numbers for the steps per revolution. 1695 for x and y and 10160 for Z are impossible numbers...you will get better performance out of the machine if you set these correctly.
read this post for more info...
viewtopic.php?f=63&t=1801

Hi Keith! I just saw this, thanks so much for the heads up. Sorry, I just started another thread with some related stuff. The jumpering trick is going to work super well for now.

I'll also get those proximity switches on order.

The revolution steps are what the previous owner had set up in Mach3, and I just copied it over. Thanks for the link, I'll follow the directions there.

Leah