Save and recall variables from file

MaxGyver

In my CNC setup, the spindle control value does not linearly correspond to spindle speed. I have a macro that slowly dials in the control value until the desired spindle speed is reached. I would like to save both values, spindle speed and corresponding control value to a .csv or macro file. My goal is to recall these values to get the rough spindle speed from the file and only do the fine adjustment with the "dial in"-macro

-Cheers
Max

OwenD

@maxgyver
You can use
echo >>filename and echo >filename to create and append to a file.
Then just send the commands you want to run

e.g.

echo >>"mymacro.g" M3 S{spindles[0].current} ;create/overwrite file

echo >"my macro.g" "G1 X0 Y0 Z{move.axes[2].max} ; append to file

MaxGyver

@owend thank you, it works flawless!

To whomever it might concern/interest:

I have a CNC-setup where the spindle speed is controlled by manually adjusting a potentiometer.
In order to control the spindle speed via the duet, I have built a contraption that uses a small RC servo to turn the potentiometer for me.

I have created some global variables for better debugging. But the macro will also work with normal variables. But these have to be defined!

my "create lookup macro":

echo >>"lookup.g""" ;create lookup.g
M280 P0 S0	;reset servo position
G4 S1	;wait for servo
M80	;turn on Power
G4 S1	;wait for power
set global.servo=0	;reset servo position
M3 P0 S650	;switch on spindle
G4 S2	;wait for spindle to get up to speed

echo "LookupTable START"
while global.servo<=180 ;repear until servo arm is at 180°
 if spindles[0].active-fans[1].rpm>1 || spindles[0].active-fans[1].rpm <-1 ; the loop is repeated as long as the difference between spindles[0].active (set RPM) and fans[1].rpm (measured RPM) >+-1 RPM
  set global.servo={global.servo+((spindles[0].active-fans[1].rpm)/100)} ; set global.servo depending on the difference between spindles[0].active (set RPM) and fans[1].rpm (measured RPM)
  M280 P0 S{global.servo} ; use global.servo to set servo position
  G4 S0.5 ;wait for servo and spindle to get to new RPM
 else ;if the difference between spindles[0].active (set RPM) and fans[1].rpm (measured RPM) <+-1 RPM
  echo >>"lookup.g" "if spindles[0].active >= "^spindles[0].active^"" ;append to lookup.g as a new line
  echo >>"lookup.g" " M280 P0 S{"^ global.servo ^"}" ;append to lookup.g as a new line
  G4 S1 ;wait
  M3 P0 S{spindles[0].active+25} ; increase spindle speed by 25RPM
echo "LookupTable END"
M5 ;turn off spindle
M280 P0 S0; reset servo position