Bltouch in alarm mode when V_IN isn't on
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On my maestro, I connected the ground of my bltouch to the E1 pwm pin, which from the schematic should just switch to ground, so that I could turn it off when not homing (to turn off the bright light). Turning it off and on in the homing files is all working, however moving the grounds from the Z probe header to the E1 header has caused the bltouch to be in alarm mode (blinking red light) when V_IN isn't on (external 5v is on). It blinks with or without the ground on/connected but very faintly with it off. Occasionally turning it off with v_in off doesn't turn off the led immediately but it fades slowly so it seems like there's a cap somewhere I'm not noticing. Is there a better pin for this or should one of the bltouch grounds be connected differently than the other?
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It seems like this happens when 5v and Z_PROBE_MOD (or the servo pin in the expansion) are connected. I got around it by disconnecting 5v and using 3.3v (on the red v_in line which shouldn't work) instead but the bltouch thinks there's a fault on 5v now so that's not great, but it seems to be working for now.
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@jphilly said in Bltouch in alarm mode when V_IN isn't on:
It seems like this happens when 5v and Z_PROBE_MOD
that sounds like a bad idea as the Z_PROBE_MOD is a 3.3v signal
what causes those to be connected?
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@bearer I guess I worded that poorly. I meant when the bltouch's 5v and servo wires are connected to the board's 5v and z_probe_mod pins, respectively, not that I wired them together.
