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Spark-Concepts / xPro-V5

xPro-V5 CNC Motion Control System Documentation and User Information
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Spindle speed changes during toolpath #91

Closed ausip closed 2 years ago

ausip commented 2 years ago

I am having issues with the spindle speed changing during cutting different elements of a toolpath. Spindle speed drops during arcs and ramping. The issue only occurs when using a spindle speed above 10000rpm. It's very noticeable at 24000rpm.

My VFD is connected via 0-10V and I have tested the output and the xPro is tuned to exactly 10v at 24000rpm.

Below are my init macro script etc. for CNC.js & the gcode I am using. gCode is created from Fusion360. I've tried both their included GRBL post processor as well as OpenBuilds post processor.

Here is a video demonstrating the issue. https://youtu.be/p8f5Kx_i-Gw

CNC.js Init Script $Homing/Cycle0=Z $Homing/Cycle1=X $Homing/Cycle2=Y $Stepper/Pulse=5 $Stepper/IdleTime=255 $Stepper/DirInvert=Y $Stepper/EnableInvert=Off $Limits/Invert=On $Probe/Invert=On $Report/Status=1 $Limits/Hard=On $Homing/Enable=On $Homing/DirInvert=X $Homing/Squared=Y $Homing/Feed=100.000 $Homing/Seek=1500.000 $Homing/Pulloff=2.500 $X/StepsPerMm=200.002 $Y/StepsPerMm=199.823 $Z/StepsPerMm=200.400 $A/StepsPerMm=199.823 $X/MaxRate=3000.000 $Y/MaxRate=3000.000 $Z/MaxRate=2500.000 $A/MaxRate=3000.000 $X/Acceleration=150.000 $Y/Acceleration=150.000 $Z/Acceleration=150.000 $A/Acceleration=150.000 $X/MaxTravel=1232.50 $Y/MaxTravel=830.00 $Z/MaxTravel=210.00 $A/MaxTravel=810.00 $X/Current/Run=1.950 $Y/Current/Run=1.950 $Z/Current/Run=1.950 $A/Current/Run=1.950 $X/Current/Hold=1.250 $Y/Current/Hold=1.250 $Z/Current/Hold=1.250 $A/Current/Hold=1.250 $X/Microsteps=8 $Y/Microsteps=8 $Z/Microsteps=8 $A/Microsteps=8 $Spindle/Type=PWM $GCode/MaxS=24000 $GCode/MinS=8000

GCode $$ client> $$ $0=5 (Step pulse time, microseconds) $1=255 (Step idle delay, milliseconds) $2=0 (Step pulse invert, mask) $3=2 (Step direction invert, mask) $4=0 (Invert step enable pin, boolean) $5=1 (Invert limit pins, boolean) $6=1 (Invert probe pin, boolean) $10=1 (Status report options, mask) $11=0.010 (Junction deviation, millimeters) $12=0.002 (Arc tolerance, millimeters) $13=0 (Report in inches, boolean) $20=0 (Soft limits enable, boolean) $21=1 (Hard limits enable, boolean) $22=1 (Homing cycle enable, boolean) $23=1 (Homing direction invert, mask) $24=100.000 (Homing locate feed rate, mm/min) $25=1500.000 (Homing search seek rate, mm/min) $26=250.000 (Homing switch debounce delay, milliseconds) $27=2.500 (Homing switch pull-off distance, millimeters) $30=24000.000 (Maximum spindle speed, RPM) $31=8000.000 (Minimum spindle speed, RPM) $32=0 (Laser-mode enable, boolean) $100=200.002 (X-axis travel resolution, step/mm) $101=199.823 (Y-axis travel resolution, step/mm) $102=200.400 (Z-axis travel resolution, step/mm) $103=199.823 $104=100.000 $105=100.000 $110=3000.000 (X-axis maximum rate, mm/min) $111=3000.000 (Y-axis maximum rate, mm/min) $112=2500.000 (Z-axis maximum rate, mm/min) $113=3000.000 $114=1000.000 $115=1000.000 $120=150.000 (X-axis acceleration, mm/sec^2) $121=150.000 (Y-axis acceleration, mm/sec^2) $122=150.000 (Z-axis acceleration, mm/sec^2) $123=150.000 $124=200.000 $125=200.000 $130=1232.500 (X-axis maximum travel, millimeters) $131=830.000 (Y-axis maximum travel, millimeters) $132=210.000 (Z-axis maximum travel, millimeters) $133=810.000 $134=300.000 $135=300.000 ok LeadTableBracketBase.txt

Spark-Concepts commented 2 years ago

I sounds like you are getting a little noise through the 0-10V line when under lots of motor loading. If you put a capacitor on from the 0-10V terminal to the GND terminal on the toolhead connector it should clean up the signal.

ausip commented 2 years ago

@Spark-Concepts , thanks for the response. a 22uF capacitor across the input on the VFD fixed it.

I've ordered some ferrites and an AC noise filter to further clean up any other EMI issues.

Thanks heaps