So What causes this?!?

[ByronM (Byron Montgomerie)]

bust_0003.gcode (530.2 KB)
(Generated by gcodetools from Inkscape.)

I am referring to the nice sloping run away line that doesn’t seem to have a source in the gcode, way past negative Y, it’s not skipping steps, and I don’t have a dog pulling on the rails. Luckily it was going slow enough, and I was only using a pen, that nothing were hurt in the process. I seem to recall issues like this before, but on totally different hardware, perhaps it’s just a gcodetools bug, or something still left in marlin to fix.

Cheers!

[jeffeb3]

This looks an awful lot like the noise issue we’ve been seeing occasionally. What board is it, what firmware, and how are you running the gcode?

[jeffeb3]

Router Rapidly Moving Sideways During longer Runs

Hello Everyone, I finished building my MPCNC about 3 months ago. It’s using a MiniRambo with the Full Graphic Smart Controller. I’d built a few things with it (just starting out cutting MDF) and built up some confidence, and everything was going fine. I am using a Makita RT0701C. I decided to start to put more items to cut into my runs to simplify things for my next project. This obviously resulted in longer run times (1 hour 30 minutes, previously I’d limited myself to half hour or so runs). …

[ByronM (Byron Montgomerie)]

Mini Rambo, Ryan’s compile says May 28, 2020, lowrider 2, octoprint, have a clamp on ferrite core on the usb cable, which is 5 inches long.

This is me, first foot on the floor getting out of bed, lol.

Cheers!

[madgrizzle]

I’ve seen odd behavior like this caused by G2/G3 gcode on the maslowcnc. It’s possible there is a specific command, like a really, really, really small arc (artifact of converting a bitmap to vector) resulting in something that throws the firmware. On Maslow, we added code to firmware that replaced infinitesimally small arcs with short lines to solve it.

[jeffeb3]

Estlcam can do the same. There is a checkmark for using arcs. If you turn that off, it will use line segments.