I think this issue was briefly mentioned in here: Laser: True grayscale instead of dithering? but it’s really causing a problem for me at the moment. @MadHatter, did you ever have any revelations on getting the machine not to stop?
While doing grayscale images that continuously change the laser power travelling at a constant speed, every laser power change causes the machine to come to a brief stop. This wrecks power regulation.
There has to be a way to modify the Marlin core so the motion planner doesn’t decelerate to do a power change.
Until that’s fixed exact grayscale reproduction will be a compromise at very slow speeds to minimize the acceleration affect.
I’m wondering if a temporary workaround would be to modify the acceleration limits at the start of the file. Would the acceleration need to go up? Down? Both could work I think, for different reasons.