D1 L# R# //set spool diameter for left and right (stored in eprom in cm)
D2 print current saved spool diameter

D3 list files on SD card
D4 **** //file name - read a file on the sd card

M18 disable motors
M17 active motors
M100 display help
M101 T B L R page size from centre 0,0
1790 - 850
1900 - 950


M110
M114

G0
G1 line must send z with hight greater than max servo lift
G2
G3 arc
G4 dwell
G20 inch mode
G21 mm mode
G28 home
G54-G59 tool offsets
G90 absolute mode
G91 relative mode
G92 set position