BL touch setup/wiring

williamwestonn · 24 Apr 2019, 05:25

Working on the wiring im trying it minimize the amount of cables going to the X_carriage...

question:"Is it possible to use one GND wire for both the BL-touch and the 3-pin PWM fans running at 5v?"
Answer: "No, GND on fan is cotrolling the Pwm for the fans."

Question: But if i run +5v with one cable to the X_carriage. Is it possible to use this one to power all the fans and the BL-touch without interfearing with the BL? (Running 5v PWM fans)
Answer:

Veti · 24 Apr 2019, 05:48

no, the fan negative is the pin producing the pwm signal for the fans.

williamwestonn · 24 Apr 2019, 06:37

Oh thats a bummer... Thanks for the fast reply.
Is the 5V always on then? Or can i connect them in single cable setup?
Because the bl and both fans are running 5v

Veti · 24 Apr 2019, 06:58

if you want to have nice cabling to the x carriage you could get unshielded cat5e cable.
that gives you 8 wires of AWG 24 which are rated around 1.4 - 2A per wire. That is fine for both fans and sensors but not the heater. And you could use RJ45 connectors for quick connect/disconnect.

williamwestonn · 24 Apr 2019, 07:51

@veti My issue is that if running all connections separet ill get 11 cables total, running GND for bl one cable and all 5v together ill get 6 cables

dc42 · 24 Apr 2019, 12:08

@williamwestonn said in BL touch setup/wiring:

Question: But if i run +5v with one cable to the X_carriage. Is it possible to use this one to power all the fans and the BL-touch without interfearing with the BL? (Running 5v PWM fans)

Yes, that's possible.

Caution: when using 5V fans, make quite sure that there is no possibility of a short between +5V and a 12V/24V heater wire. Such a short will damage the Duet.

williamwestonn · 24 Apr 2019, 13:14

@dc42 thanks for the imput! I think i will put the fan, motor, sensor wires another route after the tube leading from the X carriage to prevent having 5, 24 and 230v in the same place. I guess a 24awg cable for 5v and the rest connected via Cat5e(26awg) is good anought?

Thanks

dc42 · 24 Apr 2019, 13:17

@williamwestonn said in BL touch setup/wiring:

@dc42 thanks for the imput! I think i will put the fan, motor, sensor wires another route after the tube leading from the X carriage to prevent having 5, 24 and 230v in the same place. I guess a 24awg cable for 5v and the rest connected via Cat5e(26awg) is good anought?

Thanks

Why do you need 230V going to the X carriage? That sounds rather high to run over Cat5e cable. The table at https://en.wikipedia.org/wiki/Category_5_cable suggests that the specification for Cat5e is 125VDC max.

williamwestonn · 24 Apr 2019, 13:35

heh sorry for not explaining that well, there will be a 14awg cable for a heater that will go half way up to the carriage, i will probably put that on the other side of the printer instead of how i designed it to go 10mm to the right from the 5/25v cables. There will be cable deviders on the printer so ill do it as safe as i can