needing some guideance

henryL1985

i am rebuilding a geeetech I3 and i am of course going to be using a duet2 wifi unit for this build and i noticed that it has a BL touch... it has a connector that is with 2 wires and then a 3 wire connector... my question is where does it plug in on the board for it to work correctly, im not in the mood to be shorting out a board ...lol

Lo-Fi

@henryl1985 I connected mine up as per here:

https://betrue3d.dk/bltouch-on-duet-wifi-duetreprapfirmware/

Though used heater3 for the PWM control PIN, rather than heater7 in the article to keep those pins closely grouped. A single 8 pin Dupont connector then works for the 5V, GND and control pin - leaving the others unconnected - and keeps it super neat. The remaining 2 probe wires just need crimping into a 4 pin molex to GND and Z Probe In.

My config as follows (Duet WiFi 2, RRF3.3+)


M574 Z1 S2 ; set Z stop for probe

M950 S0 C"exp.heater3" ; create servo pin 0 for BLTouch
M558 P9 C"^zprobe.in" H1 F120 T9000  ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X45 Y0 Z2.399 ; set Z probe trigger value, offset and trigger height
M557 X45:345 Y25:325 S100 ; define mesh grid

Don't forget to check what version of BLTouch you have and what voltage it's set to.

henryL1985

@lo-fi so here is the bltouch it was equipped with so the 3 wire connector is the one that you recommended to put into a 8 pin Dupont and of course making sire i have the correct voltage determined before this.. then the 2 wire one goes to the 4 pin molex with z probe in and ground

fcwilt

@henryl1985

Unless you need the greater current capacity of the drivers on the Duet 2 WiFi you might want to consider a Duet 3. The Duet 2 is running out of memory and at some point it may no longer be able to run the newest firmware.

Just something to think about.

Frederick

henryL1985

@fcwilt that is interesting fact that i didnt know about thank you for the heads up on that ... for me the duet2 with wifi will still do the job this printer is just something to have fun with...

fcwilt

@henryl1985 said in needing some guideance:

@fcwilt that is interesting fact that i didnt know about thank you for the heads up on that ... for me the duet2 with wifi will still do the job this printer is just something to have fun with...

Then you should look at the Duet 3 Mini 5+ - it's less expensive and very good if you don't need the drivers on the Duet 2.

Frederick