Grbl Settings

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This table lists various configurations and sample settings for various versions of Grbl. It is intended for convenient comparison. Step values use default settings for micro-steps. 0.9 values sourced from: http://www.shapeoko.com/forum/viewtopic.php?f=6&t=4256#p31781 c.f. http://www.shapeoko.com/forum/viewtopic.php?f=3&t=5766&p=43807#p43624

Sortable table
Setting Grbl 0.8 Grbl 0.9
steps/mm x $0 = 40.20 (GT2) 43.74 (MXL) $100= 40.20 (GT2) 43.74 (MXL)
steps/mm y $1 = 40.20 (GT2) 43.74 (MXL) $101= 40.20 (GT2) 43.74 (MXL)
steps/mm z $2 = 320.00 (M8 threaded rod) $102=320.00 (M8 threaded rod)
step pulse (microseconds) $3 = 30 $0 = 10
mm/min default feed rate $4 = 500.00
x max rate, mm/min ?!? $110=500.000
y max rate, mm/min ?!? $111=500.000
z max rate, mm/min ?!? $112=500.000
mm/min default seek rate $5 = 500.00
step port invert mask $6 = 28 (binary = 00011100) $2 = 28 (binary = 00011100)
step idle delay, msec $7 = 255 (motors powered on continuously) $1 = 255 (motors powered on continuously)
acceleration in mm/sec^2 $8 = 25.00
x accel, mm/sec^2 ?!? $120=25.000
y accel, mm/sec^2 ?!? $121=25.000
z accel, mm/sec^2 ?!? $122=25.00
junction deviation, mm $9 = 0.050 $11=0.020
arc, mm/segment $10 = 0.100
n-arc correction, int $11 = 25 $12=0.002 (arc tolerance, mm)
n-decimals, int $12 = 3
report inches, bool $13 = 0 $13=0
auto start, bool $14 = 1
invert step enable, bool $15 = 0 $4 = 0
soft limits, bool ?!? $20=0
hard limits, bool $16 = 0 $21=0
homing cycle, bool $17 = 0 $22=0
homing dir invert mask $18 = (int:00000000) $23=1 (mask:00000001)
homing feed, mm/min $19 = 25.000 $24=25.000
homing seek, mm/min $20 = 250.000 $25=635.000
homing debounce, msec $21 = 100 $26=100
homing pull-off, mm $22 = 1.000 $27=1.000
dir port invert mask ?!? $3=6 (00000110)
limit pins invert, bool ?!? $5=0
probe pin invert, bool ?!? $6=0
status report mask ?!? $10=3 (00000011)
x max travel, mm ?!? $130=298.000
y max travel, mm ?!? $131=301.000
z max travel, mm ?!? $132=54.000