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gnea / grbl

An open source, embedded, high performance g-code-parser and CNC milling controller written in optimized C that will run on a straight Arduino
https://github.com/gnea/grbl/wiki
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Stepper driver DVR8825 #668

Open peagerfw opened 5 years ago

peagerfw commented 5 years ago

Hi,i have new stepper driver dvr8825 but if i engrave 40x40mm size final product is cca 20x20mm If use stepper driver A4988 engraved size is ok.Please how to set DVR8825? Thank you.

109JB commented 5 years ago

You need to adjust your steps/mm. See this: https://github.com/gnea/grbl/wiki/Grbl-v1.1-Configuration#100-101-and-102--xyz-stepsmm

peagerfw commented 5 years ago

i adjusted $100, $101 and $102 – [X,Y,Z] steps/mm from 800 to 1600 but stepper motor stop after 20mm and buzzer it

109JB commented 5 years ago

post all of your settings

peagerfw commented 5 years ago

$0=10 $1=25 $2=0 $3=5 $4=0 $5=0 $6=0 $10=3 $11=0.010 $12=0.002 $13=0 $20=0 $21=0 $22=0 $23=0 $24=25.000 $25=500.000 $26=250 $27=0.000 $30=10000 $31=0 $32=0 $100=800.000 $101=800.000 $102=800.000 $110=1800.000 $111=1800.000 $112=1800.000 $120=100.000 $121=100.000 $122=100.000 $130=300.000 $131=150.000 $132=44.000

JamieAKing commented 5 years ago

You need to reduce steps per mm not increase, alternatively alter the drive itself to match the current setting. Looks like you need to increase micro steps from 4x to 8x The stall and stepper buzz could be lack of current from the new driver? Have you adjusted this to your motors rating?

MARIOBASZ commented 5 years ago

you must control the micropasses that you have established with the m1 m2 m3 bridges in drv8825, you are probably giving more micropasses than in A4988, look at the technical data of each one

peagerfw commented 5 years ago

Thank you so much for help https://github.com/arkypita/LaserGRBL/issues/664