I had this hard limit issue a a few weeks ago and thought it was fixed via vacuum hose touching the rails, that was fixed and didn't have any issues until today, it's a million miles away from any trigger but I am getting a hard limit trigger every ten minutes of a cut, router is literally in the middle of the table, don't even have a vacuum hose hooked up, wires are clean and not being touched by any other power wires that are unrelated to the hard limit cables. This is extremely frustrating as I shouldn't have to have my fingers crossed and spend 4 hours trying to do a 45 minute cut. Any advice would be greatly appreciated. Yes I've read the EMI document, I have no EMI issues per what the document is describing.
Post some pictures of your setup, we can help check for possible issues Our standard FAQ docs:blackbox-x32:faq-emi [OpenBuilds Documentation] covers the usual issues, but lets get an eye on it and see if something pops out at us Random Hard Limits "are" EMI
Oh, and have you checked your router's Brushes recently (wear item, standard maintenance about every 100 run hours, as they wear down the spark causing EMI)
I understand they're EMI issues, but per the document I've addressed everything within it and do not have any of those problems to correct as they're all addressed.
There's always the option of Hard Limits = OFF (use Soft Limits - prevent a runaway BEFORE it happens, rather than a switch that stops it once its already too late)
How do I switch to hard limits off, I am always standing here with the machine while it's cutting, I would be comfortable with that option right now. Do you have a video link or pdf regarding changing out the brushes?
CONTROL > Grbl Settings > Scroll down to Hard Limits > Set to Disabled > Save and > Reset when prompted Which router do you have? If its our RoutER11 manual that was in the box had instructions (and spare brushes) If its 3rd party (Dewalt etc): Youtube to the rescue
I have the router 11 and the extra set of brushes, I'll look at that today. I slowed the machine way down. I've been cutting everything at 130 In / min feed rate, 30 plunge, 0.1 inch depth, 1/4" bit. I took jog down to 65% and feed rate down to 65% and it's not triggering a hard limit so far on this bigger cut.
Cut like a beast at the previous listed settings with hard limit off. I am going to replace the brush this evening.
