So last night I kept getting invalid g code errors ID: 33 while using UGS Console to send gCode created with VCarve Pro.
It was having issues with the ARC command.
After doing a bit of research It looks like the problem may be not enough decimal places on the ARC command variables I and J?
A while back I reduced the number of decimal places on the gCode output. I did this to reduce file size and to try to get as close to single step values for better theoretical accuracy vs precision.
However, I reduced it on the ARC variables as well. I probably have not seen the error come up before because ARC commands are so rarely used by vCarve.
So I am going to set the I and J variables back to 5 decimal places and see if that fixes the problem.
I will update as I go.
VAR ARC_CENTRE_I_INC_POSITION = [I|A|I|**1.5**]
VAR ARC_CENTRE_J_INC_POSITION = [J|A|J|1.5]
For reference here is my post processor code:
+================================================
+
- Vectric machine output configuration file
+================================================
+
- History
- Who When What
- ======== ========== ===========================
- Tait L. 05/07/2015 Written
- L2Hench 08/17/2015 Added G90 (Absolute Addressing) to header
- L2Hench 08/19/2015 Added M05 (Spindle Stop) to footer
- L2Hench 08/18/2015 Added M09 (Coolant Stop) to footer
- L2Hench 03/02/2016 Removed T1M6 (Tool Change) from header
- L2Hench 03/28/2016 Added M07 (Coolant On, Mist) to header
- L2Hench 07/12/2016 Modified decimal place value of X axis from 4 to 2 (single step accuracy of 0.04mm per step for 8mm ACME rod)
- L2Hench 07/12/2016 Modified decimal place value of Y axis from 4 to 2 (single step accuracy of 0.30mm per step for 3mm belt)
- L2Hench 07/12/2016 Modified decimal place value of Z axis from 4 to 2 (single step accuracy of 0.04mm per step for 8mm ACME rod)
- L2Hench 08/15/2017 Restored ARC Variable to 5 decmial places to fix GRBL invalid g code Error ID: 33
+================================================POST_NAME = “Kaiju Carve (mm) (*.gcode)”
UNITS = “MM”
FILE_EXTENSION = “gcode”
±-----------------------------------------------
- Line terminating characters
±-----------------------------------------------LINE_ENDING = “[13][10]”
±-----------------------------------------------
- Block numbering
±-----------------------------------------------LINE_NUMBER_START = 0
LINE_NUMBER_INCREMENT = 10
LINE_NUMBER_MAXIMUM = 999999+================================================
+
- Formating for variables
+================================================
VAR LINE_NUMBER = [N|A|N|1.0]
VAR SPINDLE_SPEED = [S|A|S|1.0]
VAR FEED_RATE = [F|C|F|1.1]
VAR X_POSITION = [X|C|X|1.2]
VAR Y_POSITION = [Y|C|Y|1.2]
VAR Z_POSITION = [Z|C|Z|1.2]
VAR ARC_CENTRE_I_INC_POSITION = [I|A|I|1.5]
VAR ARC_CENTRE_J_INC_POSITION = [J|A|J|1.5]
VAR X_HOME_POSITION = [XH|A|X|1.2]
VAR Y_HOME_POSITION = [YH|A|Y|1.2]
VAR Z_HOME_POSITION = [ZH|A|Z|1.2]+================================================
+
- Block definitions for toolpath output
+================================================
±--------------------------------------------------
- Commands output at the start of the file
±--------------------------------------------------begin HEADER
“G17”
- XY Plane selection +
“G21”
- Programming in millmeters (mm) +
“G90”
- Absolute Programing +
“G0 [ZH]”
- Rapid Move Z axis to Start Position +
“M07”
- Coolant ON (mist) +
“G0 [XH] [YH] [S] M3”
- Rapid Move X axis to Start Position, Move Y axis to Start Position, Speed (RPM), Spindle ON +
±--------------------------------------------------
- Commands output for rapid moves
±--------------------------------------------------begin RAPID_MOVE
“G0 [Y] [Z]”
±--------------------------------------------------
- Commands output for the first feed rate move
±--------------------------------------------------begin FIRST_FEED_MOVE
“G1 [Y] [Z] [F]”
±--------------------------------------------------
- Commands output for feed rate moves
±--------------------------------------------------begin FEED_MOVE
“G1 [Y] [Z]”
±--------------------------------------------------
- Commands output for the first clockwise arc move
±--------------------------------------------------begin FIRST_CW_ARC_MOVE
“G2 [Y] [I] [J] [F]”
±--------------------------------------------------
- Commands output for clockwise arc move
±--------------------------------------------------begin CW_ARC_MOVE
“G2 [Y] [I] [J]”
±--------------------------------------------------
- Commands output for the first counterclockwise arc move
±--------------------------------------------------begin FIRST_CCW_ARC_MOVE
“G3 [Y] [I] [J] [F]”
±--------------------------------------------------
- Commands output for counterclockwise arc move
±--------------------------------------------------begin CCW_ARC_MOVE
“G3 [Y] [I] [J]”
±--------------------------------------------------
- Commands output at the end of the file
±--------------------------------------------------begin FOOTER
“G0 [ZH]”
- Rapid Move Z axis to Start Position +
“G0 [XH] [YH]”
- Rapid Move X and Y axis to Start Position +
“M05”
- Spindle Stop +
“M09”
- Coolant OFF +
“M30”
- End of program +
