[Grbl_Esp32 Issue#223] Laser mode don’t work as expected ($32=1) About GRBL HAL

Issue #223 | 状态: 已关闭 | 作者: ewidance | 创建时间: 2019-09-15

标签: bug

Edit : This is comment #42.. The Answer? (Douglas Adams)

I’ve wired a prototype using MPCNCV1P2 pinount. The firmware is compiled with CPUMAPMPCNCV1P2 pinout, In cpu Map, USESPINDLERELAY is commented, and COOLANTFLOODPIN is set to GIONUM_2.

Laser SPINDLEPWMPIN is on GPIONUM16 (with a level shifter for 5V), SPINDLEENABLEPIN is on 32 (level shifted also, and not used for the moment), and COOLANTFLOODPIN on pin2 is wired to a relay for Laser Fan.

When laser mode is off ($32=0), Laser power is properly controlled with M3 S0 > 255/M5. Fan is working (M8/M9). Spindle enable pin don’t seems to work (i’ve pu a led on it).

Since laser mode is supposed only to allow instant PWM changes without wating for a spindle to rise up, i’ve tried to set it on ($32=1).

Laser fan (coolant flood) continue working ok, but the’s not anymore PWM on SPINDLEPWMPIN.

In both cases, SPINDLEENABLEPIN stays off.

Now the questions :
* Why SPINDLEPWMPIN is not working in Laser mode?
* Why SPINDLEENABLEPIN stays always off?

Thanks you for you time and patience, Bart. Again a big thank you for the job done…

PS : Laser code is generated with Lightburn.

JPC

#1 – bdring 于 2019-09-15

I’ll look into your problem on that controller this week.

#2 – bdring 于 2019-09-16

It seems to work for me. The in laser mode, spindle enable is always on during M3 and M4 and off during M5. I am using the stock CPUMAPMPCNCV1P2 cpumap.

In laser mode…

M3 works very similar to non laser mode, except S values are immediately applied to the PWM.

M4 compensates for the exact speed compared to desired feed rate during accel and decel. Therefore it goes to zero after a move is done.

Here is some M3 gcode that works for me. Notice all the S values. This was generated by laser Grbl.
“G90 G0 X40 Y34 M3 S0 F1000 G1 X55.333 S255 G0 X55.667 Y34 S0 G1 X118.333 S255 S0 G0 X118.333 Y34.333 S0“

#3 – bdring 于 2019-09-16

Can you paste the minimal amount of gcode that shows the problem you are having?

#4 – ewidance 于 2019-09-17

I’ve tested with your Gcode. WIth laser mode off, laser powers on. WIth laser mode on, laser don’t power on. I’ve put a led on pwm output to appreciate modulation.

Just in case, here’s my $$ config:
“$0=3 $1=250 $2=0 $3=0 $4=0 $5=1 $6=0 $10=1 $11=0.010 $12=0.002 $13=0 $20=0 $21=0 $22=0 $23=3 $24=600.000 $25=2000.000 $26=250 $27=1.500 $30=1000.000 $31=0.000 $32=1 $100=1000.000 $101=1000.000 $102=1000.000 $110=6000.000 $111=6000.000 $112=3000.000 $120=1000.000 $121=1000.000 $122=1000.000 $130=500.000 $131=500.000 $132=80.000`


As asked, here's a minimal amount of code generated with lightburn:

`; LightBurn 0.9.07 ; GRBL-M3 (1.1e or earlier) device profile, absolute coords G00 G17 G40 G21 G54 G90 ; Cut @ 6000 mm/min, 100% power M8 M5 G0X6Y5 M3 G1Y20S255F6000 G1X33 G1Y5 G1X6 M5 M9 G1S0 G90 ; return to user-defined finish pos G0 X0 Y0 M2“

Same results.. No output when $32=1…

I really don’t see whats happening.

#5 – ewidance 于 2019-09-17

Version infos:
UI: 2.1b51 / FW: 1.1f (20190905)

#6 – bdring 于 2019-09-17

I might have found the problem at around

#7 – ewidance 于 2019-09-17

Gotcha! Works fine now in both modes on pwm pin. Well done … Should SPINDLEENABLEPIN be activated during laser fire?

#8 – bdring 于 2019-09-17

For me…

M3 is SPINDLEENABLEPIN on
M5 is SPINDLEENABLEPIN off.

It does not not depend on PWM value. PWM 0 still has enable on during M3

#9 – ewidance 于 2019-09-17

Don’t works. I’ve tested with SPINDLEENABLEOFFWITHZERO_SPEED defined (in case M3S0). Same thing. I’ll check the wiring tomorrow. It’s 11h30 PM in france. Thanks a lot for the great support. I’ll post results on my tests.

#10 – bdring 于 2019-09-17

Are you testing in the MPCNC V1P2 controller? If so, is power connected to the controller or just the USB power?

#11 – ewidance 于 2019-09-18

No, as said inthe beginnning of thread, “I’ve wired a prototype using MPCNCV1P2 pinount”. It’s not a MPCNCV1P2 (there where no more available for sale). But yes i’m testing with both powers.

#12 – ewidance 于 2019-09-21

I’ve double check wiring, and the level shifter on GPIO32 (Spindle enable) was dead. After repairing, SPINDLE_ENABLE works as expected. Bug can be closed, and commit done on modification you’ve dont on stepper.cpp. Thank’s again!

原始Issue: https://github.com/bdring/Grbl_Esp32/issues/223

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