Adding relay to the router

Mostly Printed CNC - MPCNC Hardware Development
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So, I wired up the ss relay to my power bar (tapped the existing switch), I tossed 5V on the inputs, it turned on a usb charger I had plugged into it, and the signal drew hardly any current, maybe 10 mA. Just need to find some free pins on the mini rambo to set m3/m5, (I will be using the LCD). Safety wise, it is screwed in under the table with some electrical tape around the recessed AC poles.

Cheers!

EDIT:

This looks like a safe candidate (lowrider 2, mini-rambo context)

#define Z_MIN_PIN 10

to

#define Z_MIN_PIN -1 // 10

and

#define SPINDLE_LASER_PWM_PIN 9 // Hardware PWM
#define SPINDLE_LASER_ENA_PIN 18 // Pullup!
#define SPINDLE_DIR_PIN 19

to

#define SPINDLE_LASER_ENA_PIN 10 //18

My only question would be what where the values doing as they are, leftovers or something functional? Shouldn’t they be -1 if the LCD is plugged in perhaps in a #else?

EDIT2:

I couldn’t get that to work, probably have to enable spindles / lasers or something, I do have it working with m106 /m107, fan1.

EDIT3:

Got it to work with M3 / M5 by simply using the FAN1 and mapping that to be the spindle enable pin. It’s two pin already, no 5V nearby, easy to access, and non critical.

configuration_adv.h

#define SPINDLE_FEATURE
//#define LASER_FEATURE
#if EITHER(SPINDLE_FEATURE, LASER_FEATURE)
#define SPINDLE_LASER_ACTIVE_HIGH true // Set to “true” if the on/off function is active HIGH
#define SPINDLE_LASER_PWM false // Set to “true” if your controller supports setting the speed/power
#define SPINDLE_LASER_PWM_INVERT false // Set to “true” if the speed/power goes up when you want it to go slower

//#define SPINDLE_LASER_FREQUENCY 2500 // (Hz) Spindle/laser frequency (only on supported HALs: AVR and LPC)

There is a bug IMO where the check is done against SPINDLE_LASER_FREQUENCY and not SPINDLE_LASER_PWM, so un-defining this is required.

/**

  • Speed / Power can be set (‘M3 S’) and displayed in terms of:
    • PWM (S0 - S255)
    • PERCENT (S0 - S100)
    • RPM (S0 - S50000) Best for use with a spindle
      */
      #define CUTTER_POWER_DISPLAY RPM

Meaningless, for completeness.

pins_minirambo.h

#ifndef FAN_PIN
#define FAN_PIN -1 // 8
#endif
#define FAN1_PIN 6

//
// M3/M4/M5 - Spindle/Laser Control
//
// use P1 connector for spindle pins
#define SPINDLE_LASER_PWM_PIN -1 //9 // Hardware PWM
#define SPINDLE_LASER_ENA_PIN 8 // 18 // Pullup!
#define SPINDLE_DIR_PIN -1 //19

I had to go out of my way to avoid pwm, so the same kind change can work for speed control. I tested it against m106 and m107 and nothing happened, so good to go.

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