Having a little trouble getting my X direction to move the correct distance.
Using the G91 X390 and expecting 390mm but only getting 370. X-390 is also short
Using G91 Y390 is spot on both X and -
I have Nema 23s and GT3 belts with 20 tooth sprockets.
The configuration is the same for X and Y
[yam] y axis mode 1 [standard]
[yvm] y velocity maximum 15000 mm/min
[yfr] y feedrate maximum 16000 mm/min
[ytn] y travel minimum 0.000 mm
[ytm] y travel maximum 760.000 mm
[yjm] y jerk maximum 5000 mm/min^3 * 1 million
[yjh] y jerk homing 1000 mm/min^3 * 1 million
[yjd] y junction deviation 0.0100 mm (larger is faster)
[ysn] y switch min 1 [0=off,1=homing,2=limit,3=limit+homing]
[ysx] y switch max 0 [0=off,1=homing,2=limit,3=limit+homing]
[ysv] y search velocity 3000 mm/min
[ylv] y latch velocity 100 mm/min
[ylb] y latch backoff 20.000 mm
[yzb] y zero backoff 3.000 mm
tinyg [mm] ok>
$x
[xam] x axis mode 1 [standard]
[xvm] x velocity maximum 15000 mm/min
[xfr] x feedrate maximum 16000 mm/min
[xtn] x travel minimum 0.000 mm
[xtm] x travel maximum 570.000 mm
[xjm] x jerk maximum 5000 mm/min^3 * 1 million
[xjh] x jerk homing 1000 mm/min^3 * 1 million
[xjd] x junction deviation 0.0100 mm (larger is faster)
[xsn] x switch min 1 [0=off,1=homing,2=limit,3=limit+homing]
[xsx] x switch max 0 [0=off,1=homing,2=limit,3=limit+homing]
[xsv] x search velocity 3000 mm/min
[xlv] x latch velocity 100 mm/min
[xlb] x latch backoff 20.000 mm
[xzb] x zero backoff 3.000 mm
tinyg [mm] ok> city 100 mm/min
[xlb] x latch backoff 20.000 mm
[xzb] x zero backoff 3.000 mm
[2ma] m2 map to axis 0 [0=X,1=Y,2=Z…]
[2sa] m2 step angle 1.800 deg
[2tr] m2 travel per revolution 60.0000 mm
[2mi] m2 microsteps 8 [1,2,4,8]
[2po] m2 polarity 0 [0=normal,1=reverse]
[2pm] m2 power management 1 [0=disabled,1=always on,2=in cycle,3=when moving]
[3ma] m3 map to axis 1 [0=X,1=Y,2=Z…]
[3sa] m3 step angle 1.800 deg
[3tr] m3 travel per revolution 60.0000 mm
[3mi] m3 microsteps 8 [1,2,4,8]
[3po] m3 polarity 0 [0=normal,1=reverse]
[3pm] m3 power management 1 [0=disabled,1=always on,2=in cycle,3=when moving]
All help, suggestions appreciated.