Hello … My Machine grbl made by my self
and i set grbl profile and its oky
but i face problem with size … i meen i made file Svg with size 86.5 X 87.3 MM
but i move machine to see the size of file before i star the laser on … when the machine check the size the size is too large then the true !!!
how i can fix this problem 
Thanks
1- Is the grbl set up correct? Steps/mm 2- Is the laserweb set up correct? Svg
3- Is there any stranger point out of your drawing?
@Roberbike
1- i think Yes … But tell me maybe im wrong
2- what u meen ?!!
3- no
thanks for replay
@P_Mido
1 - check the wiki :
Check $100, $101 and $102
2- in settings, file settings check the value for svg files, px per inch
For more info, visit
@Roberbike
1 - i set $100/101/102 = 10000
2 - i set svg value 96
3 - i set dimeter laser 0.1
also in setting laser dimeter i replaced 0.2 to 0.1
@P_Mido make sure when you move machine 100mm it does move 100mm, you need to measure
@P_Mido there is a very interesting tool for calculate the correct steps per mm.
@Roberbike
My Machine Only X axis and 2 Y axis … and thanks for replay i dont understand the website … what is angle ( 200/400/48) ??
@Ariel_Yahni_UniKpty
i will measure its easy … but if not move the correct distance ?! what i should do ?! thanks for replay
@P_Mido I have the same, 1x and 2 y.
You need to know the specification if your motors, belt, pulley and micro steps. If not you need to test and test until you found the correct value.
Post some photos of your steak motors , drivers, pulley and belt
@P_Mido In $100 and $101 you need to set the amount of steps that the motor needs to make for 1mm of move.
Most usual stepper motos make 200 steps per full rotation (revolution). The stepper driver electronic can subdivide the motors full steps into microsteps (usually 8, 16 or 32 microsteps per full step).
GT2 belts and pulleys have a tooth pitch of 2mm. This means a pulley with 20 teeth moves the belt 40mm/revolution.
Ich you combine these information, then you can calculate the number of steps needed for 1mm move.
For example: 200 fullsteps/revolution of the motor multiplied by 16 microsteps/fullstep eqauls to 3200 microsteps/revolution. Divide this by 40mm/revolution and you get 80 steps/mm.
I can’t tell you the steps of your motor, but try with 200.
And you just need to count the teeth of the pully (can’t see it on the picture).
Also I can’t tell you the microsteping your electronics is using. You need to ask the seller.
Alternatively you can just set $100=80 and $101=80 and move the axis 100mm with LaserWeb jog buttons, then measure how far the axis realy moved.
@cprezzi i will try and let u know the result
thanks
@cprezzi
Hello Again
Thanks for Helping Me … i first Set it to $100=80 & 101=80
Like U Said to Me
After One Try i Measure it and i found it Move 10MM in Program = 22 Or 21 MM By Rule
After Many Try i Set $100=75 & $101=75 i Measure it i found it Move 10MM In Program = 10 MM Measure By Rule
Thanks For Helping Me
@Roberbike
Thanks For Helping Me
@Ariel_Yahni_UniKpty
Thanks for Helping Me
Thanks All
@P_Mido test the Max size of your machine in order to get a fine tune