Laser + CNC Shield v3

Software / Firmware GRBL
1

Hello, since yesterday i try to upgrade my MPCNC with a Laser Modul.


(i had paid ~100$ for this)

Laser Controller is connected with my CNC Shield:
layout1en

I use laserGRBL and have installed GRBL v1.1 (with laserGRBL)

lasergrbl
lasergrbl716×587 48.3 KB

if i press the focus button, nothing happens

lasgrbl2
lasgrbl2628×580 52.2 KB

i had try it with 5%, 10% and 30%… nothing

if i connect a LED light on PIN Z+, it burns if i push the button.

led
led725×487 29.9 KB

perhaps anyone have a idea, why i cant turn on the laser with lasergrbl.

thx

2

In your example the formula states M3 S [$10010/100] $100 is x axis travel resolution… I think it should read [$3010/100] which would be 10% of maximum spindle speed

Or…as an experiment, this is the focusing macro I have. It is 2%

M3 S2
$J=G91Z0.0001F2000

You might want to try that.

Oh dear…the ‘times’ symbol won’t print as it forces italics…but you get the idea!

3

it works now. i thought the push button on the controller was a test button… :confused:

its a switch to turn on/off PWM

4

can anyone help with the correct GRBL 1.1 Settings?
with this the steppers dont move…

default.h:

#ifdef DEFAULTS_GENERIC
  // Grbl generic default settings. Should work across different machines.
  #define DEFAULT_X_STEPS_PER_MM 50.0
  #define DEFAULT_Y_STEPS_PER_MM 50.0
  #define DEFAULT_Z_STEPS_PER_MM 100.0
  #define DEFAULT_X_MAX_RATE 6000 // mm/min
  #define DEFAULT_Y_MAX_RATE 6000 // mm/min
  #define DEFAULT_Z_MAX_RATE 1000.0 // mm/min
  #define DEFAULT_X_ACCELERATION (250.0*60*60) // 10*60*60 mm/min^2 = 10 mm/sec^2
  #define DEFAULT_Y_ACCELERATION (250.0*60*60) // 10*60*60 mm/min^2 = 10 mm/sec^2
  #define DEFAULT_Z_ACCELERATION (250.0*60*60) // 10*60*60 mm/min^2 = 10 mm/sec^2
  #define DEFAULT_X_MAX_TRAVEL 700.0 // mm NOTE: Must be a positive value.
  #define DEFAULT_Y_MAX_TRAVEL 700.0 // mm NOTE: Must be a positive value.
  #define DEFAULT_Z_MAX_TRAVEL 200.0 // mm NOTE: Must be a positive value.
  #define DEFAULT_SPINDLE_RPM_MAX 255.0 // rpm
  #define DEFAULT_SPINDLE_RPM_MIN 0.0 // rpm
  #define DEFAULT_STEP_PULSE_MICROSECONDS 10
  #define DEFAULT_STEPPING_INVERT_MASK 0
  #define DEFAULT_DIRECTION_INVERT_MASK 0
  #define DEFAULT_STEPPER_IDLE_LOCK_TIME 25 // msec (0-254, 255 keeps steppers enabled)
  #define DEFAULT_STATUS_REPORT_MASK 1 // MPos enabled
  #define DEFAULT_JUNCTION_DEVIATION 0.01 // mm
  #define DEFAULT_ARC_TOLERANCE 0.002 // mm
  #define DEFAULT_REPORT_INCHES 0 // false
  #define DEFAULT_INVERT_ST_ENABLE 0 // false
  #define DEFAULT_INVERT_LIMIT_PINS 0 // false
  #define DEFAULT_SOFT_LIMIT_ENABLE 0 // false
  #define DEFAULT_HARD_LIMIT_ENABLE 0  // false
  #define DEFAULT_INVERT_PROBE_PIN 0 // false
  #define DEFAULT_LASER_MODE 1 // false
  #define DEFAULT_HOMING_ENABLE 0  // false
  #define DEFAULT_HOMING_DIR_MASK 0 // move positive dir
  #define DEFAULT_HOMING_FEED_RATE 25.0 // mm/min
  #define DEFAULT_HOMING_SEEK_RATE 500.0 // mm/min
  #define DEFAULT_HOMING_DEBOUNCE_DELAY 250 // msec (0-65k)
  #define DEFAULT_HOMING_PULLOFF 1.0 // mm
#endif
5

That looks ok. Have you unlocked GRBL with the padlock icon?

As your x axis steps per mm is set to 50 your laser focus power will be 5% with the formula you showed earlier…which is fine…but it really should be linked to your max spindle speed (laser power) and not x axis resolution.

6

Not sure if you already have it but I found a manual for your laser ( it looks the same anyway)…
https://docs.sainsmart.com/article/wzvu9798tc-genmitsu-3018-pro-5-5-w-laser-module-user-guide

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