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Laser doesnt cut straight lines

Using Universal Gcode Sender (1.0.7) to try the , the laser just doesnt cut straight lines, its like its drifting sideways, see attached file.
Im using the
And when i type $$ (read in another thread that it might help you) i get:

$0=10 (step pulse, usec)
$1=25 (step idle delay, msec)
$2=0 (step port invert mask:00000000)
$3=2 (dir port invert mask:00000010)
$4=0 (step enable invert, bool)
$5=0 (limit pins invert, bool)
$6=0 (probe pin invert, bool)
$10=3 (status report mask:00000011)
$11=0.010 (junction deviation, mm)
$12=0.002 (arc tolerance, mm)
$13=0 (report inches, bool)
$14=1 (auto start, bool)
$20=0 (soft limits, bool)
$21=0 (hard limits, bool)
$22=1 (homing cycle, bool)
$23=0 (homing dir invert mask:00000000)
$24=25.000 (homing feed, mm/min)
$25=2000.000 (homing seek, mm/min)
$26=250 (homing debounce, msec)
$27=1.000 (homing pull-off, mm)
$100=200.000 (x, step/mm)
$101=200.000 (y, step/mm)
$102=200.000 (z, step/mm)
$110=10000.000 (x max rate, mm/min)
$111=10000.000 (y max rate, mm/min)
$112=10000.000 (z max rate, mm/min)
$120=1000.000 (x accel, mm/sec^2)
$121=1000.000 (y accel, mm/sec^2)
$122=1000.000 (z accel, mm/sec^2)
$130=410.000 (x max travel, mm)
$131=280.000 (y max travel, mm)
$132=10.000 (z max travel, mm)

In the picture attached you can see 3 different tries, all going off track, restarting everything and going from the beginning each time.
Using the X/Y +/- commands under machine control doesnt even make it go in straight lines, it wobbles sideways even if its supposed to go in a line.


  • Hi Matte,

    Can you post the pictures again?

    Have you set up the belt tension exactly as described in the assembly instructions?
  • Lets see if the file upload works this time, and it worked with no problems 2 days ago, now it doesnt anymore, so i think i did it right with the belts, i will check again

  • Hi Matte,

    This almost looks like one of the motors is not working at all.

    Can you please check the cables are inserted correctly as well as the stepper driver boards into the main Emblaser PCB.

    Perhaps taking the belts off and visually seeing the motors moving correctly may be needed.

    Also, please check the wiring on the motor cables match the following configuration:
    Motor Wire connection colors
  • One of the bolts holding the belt-wheel on top of one of the motors had gone loose, so it had weaker power then the oposite motor, resulting in the wierd lines, i just fixed that small but hard to notice problem and and put the belts in order, and everything is working smooth again!
    thanks alot for the help!
  • While assembling my Emblaser, I was wondering if I shouldn't be using some red loctite, in particular with these grub screws.

    @DarklyLabs any reason this isn't included in the build instructions?
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