Pause during carve

Hey B.,

most people in this forum reported that they paused the Standard (Original) Series successfully for hours and over night without problems. Problems that appeared with changed positions seemed to always have other reasons.

But some people reported unexpected power outages or reboots over night. They may be unrelated to the controller, but cause your positions values to be lost and when stepper motors are unpowered, they loose their electromagnetic detent and their magnetic detent is what remains, which is usually not enough to make sure they keep the position, especially the Z axis can change the position through gravity.

My approach is rather general. I think I always want to be able to resume an interrupted g-code program. For this you need accurate positioning repeatability (that’s why I mentioned the methods above). Generally, since it is an open-loop stepper machine, a position shift of any motor will remain unnoticed by the controller. Also in its stock configuration, the Standard Series with their connectors with missing serious cable management and even strain relief and the unshielded stepper cables often have general unexpected position change issues during operation due to connector problems or introduced EMI. See search results for plunge workpiece for examples, and Troubleshooting: Rail is getting hung, stuck, or out of alignment (x35/x50 machines) and Z Axis Moving Unexpectedly (Cutting too shallow or too deep) for details on the possible causes of such issues. I think if they can have such errors during operation, they can have the issues also during pause.

The dimensions of the 3-axis Touch Probe are set on the SETTINGS page and automatically subtracted when probing XYZ so the workpiece zero is exactly where the corner is (see also Onefinity Touch Probe Fine Tuning to achieve best possible accuracy). People who want to restrict the use of the 3-axis Touch probe to once after startup of the machine (to replace inaccurate stall homing) use a fixed block or jig, that can be away from workpiece, that is always there and never changes. Its front top left corner is then the absolute point of reference.