Any Idea What this stepper noise is all about?

[Stephen Lynch]

Hey guys, my machine has done this grinding noise occasionally, but a reset clears it right up. It’s not physical grinding, it’s like the steppers have no power and simply skip steps instead of moving the gantry. Since Monday, nothing I do will stop this. It’s very strange, as if I move X or Y independently, it makes no noise. If I move the 2 in tandem, all sorts of steps are lost on both X and Y. No pulleys or belts are slipping, and if I try to stop either axis with my hand, I cannot. It’s strong. I checked both the 24 and 48v power supplies, and there’s not so much as a dip when the motors move. It’s only when the file starts, or you move 2 axis at once. It immediately skips steps. Any idea?? I have changed nothing.... I've been cutting 20 hours a day for 3 weeks with zero issues, then RRRRRRRRRRRRRRRRRRRRR!.... Thanks so much for any input you can give.

Ruida controller, Nema 23 steppers.

Video here: https://1drv.ms/v/s!Aq-dl-TSBdBMo2y2f5J ... S?e=Jnwxyg

[Stephen Lynch]

so it turns out it's my employee upping the speed in the Ruida panel to 2000. He thinks it makes the machine cut faster.... SMACK!

it can't go that fast, so it just stalls the steppers instantly...

Put it back down to normal, and all is fine! I thought it was the machine just defaulting to 2000, but no! I put it down, he puts it back up!

[Tim Mellor]

Hewlett Packard have a Device to correct that issue The part number if you need to order one is 19511-80014

Ebay link if you want to buy one https://www.ebay.ca/itm/HP-P-N-19511-80 ... Sw32FeXERt