duetwifi breakout board and bltouch wiring

[Milan]

I'm using external drive breakout board, where to connect / select the PWM servo channel wiring for Bltouch, in this case, the expansion connecter occupied by breakout board, Kindly help wiring the blotch in alternative way, Thanks

[Phaedrux]

https://duet3d.dozuki.com/Wiki/Duet_Expansion_Breakout_Board
https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#Section_BLTouch

It looks like the breakout board still exposes Heater 6 PWM and Heater 7 PWM.

So I think you could use Heater 7 pin, to connect the servo wire, and use M307 H7 A-1 C-1 D-1 to unbind the heater from it, and then use P7 in your M280 servo commands. And I think you would still need to invert the M280 commands since the heater 7 pin is still on the expansion header.

For example M280 P7 S10 I1 to deploy.

[dc42]

@phaedrux said in duetwifi breakout board and bltouch wiring:

https://duet3d.dozuki.com/Wiki/Duet_Expansion_Breakout_Board
https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#Section_BLTouch

It looks like the breakout board still exposes Heater 6 PWM and Heater 7 PWM.

So I think you could use Heater 7 pin, to connect the servo wire, and use M307 H7 A-1 C-1 D-1 to unbind the heater from it, and then use P7 in your M280 servo commands. And I think you would still need to invert the M280 commands since the heater 7 pin is still on the expansion header.

For example M280 P7 S10 I1 to deploy.

The breakout board inverts the heater/servo signals to be the "right way up", just as on the DueX boards, so you won't need the I1 parameter on the M208 commands.

[Thomss]

@dc42 said in duetwifi breakout board and bltouch wiring:

The breakout board inverts the heater/servo signals to be the "right way up", just as on the DueX boards, so you won't need the I1 parameter on the M208 commands.

do i understand right, that: "The PWM heater output on the Duet acts on the negative side, to pull it low, rather than pulling it high" but with the aid of an breakout board it will be the other way (pull it high, rather than pulling it low)

[dc42]

@thomss said in duetwifi breakout board and bltouch wiring:

@dc42 said in duetwifi breakout board and bltouch wiring:

The breakout board inverts the heater/servo signals to be the "right way up", just as on the DueX boards, so you won't need the I1 parameter on the M208 commands.

do i understand right, that: "The PWM heater output on the Duet acts on the negative side, to pull it low, rather than pulling it high" but with the aid of an breakout board it will be the other way (pull it high, rather than pulling it low)

Yes.