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I'm trying to use it on a CTC I3 Pro B modified printer, replaced the print head with a 4W laser, for which i made a mount (https://www.thingiverse.com/thing:3417652) and i'm trying to get rid of the dark margins caused by deceleration of the laser on X but PWM stays high, doesn't compensate, and i'm trying to find the max acceleration so printer spends as little time as possible at the beginning and end of each line...

Laser mount for CTC I3 Pro B 40x40mm laser profile
by Razvitm