I use impulse relays

impulse relay simple and just works

220vac-impulselatching-relay-1-no-10a-contact-remote-switch-230vac-electric-relay-remote-switcher.jpg

obr1653_p605.jpg

@Simon-3 as @jay_s_uk explains powering the Pi from the Duet's 5V supply is no longer supported.

https://docs.duet3d.com/Duet3D_hardware/Duet_3_family/Duet_3_Mainboard_6HC_Hardware_Overview#h-5v

https://docs.duet3d.com/Duet3D_hardware/Duet_3_family/Duet_3_Mainboard_6HC_Hardware_Overview#revision-history

@dc42 Thanks, yes I can code to ignore messages that aren't conforming to a format that I'm expecting, and actually I've now just increased the buffer so it will slurp in the longer message (and then ignore it). I was just hoping there was maybe an easy way to avoid the message in the first place.

Also, I might want to send GCode back the other way in due course (I'm just starting to play with that option), so I probably wouldn't want to preclude that.

@Herve_Smith feel free to swap over to klipper then.
no idea what the eta will be on RP2040 toolboard support

@Nightowl PM'd

Because whatever length cable we included would be either too short or too long in most cases.

For those in the UK and some other countries we suggest "High speed ADSL/VDSL" cables such as the high speed one here https://www.kenable.co.uk/en/107-adsl-rj11-cables (the high speed ones are twisted pair, the others are not). For short distances, flat RJ11 cables can be used, but they must be straight through not crossed. See https://docs.duet3d.com/en/User_manual/Machine_configuration/CAN_connection#cables.

I'm guessing you are in the US. A search on amazon.com for "rj11 cable" returned some cables that look suitable.

@RogerPodacter said in Duet 3 Mini 5+ - Red Status LED Fast Flashing:

here is another question. i ran out of fan connections. so i am sending the ground wire of a 12V fan to the negative of the 24V out6 connection. is this an issue?

If you mean can you run the fan (and nothing else) from OUT6 but connect its positive wire to +12V instead of to the VFAN pin on OUT6, that's OK.

@droftarts
it s too small for a photo 🙂

@Merlin246 An SSR will work fine in PWM mode - just set the PWM frequency to 10 Hz (which used to be the default frequency for bed heaters). I'm not an expert but I think you'll find that a solid state relay is probably a triac in any case, or at least a variant thereof. Probably best to make sure that the SSR is a zero crossing type. My own 800W mains powered bed has been running in PWM mode via an SSR for about 5 years without any issues.

@jay_s_uk Thanks. I ended up connecting it via OUT 4 instead, though, since at the time of posting I didn't realize those ports can be set to 12 volts or 24 volts just by moving the jumper on the three pins above OUT 4 and OUT 7 (to the right, in this case). Big dumb oversight on my end, but I've never used jumpers before. Hopefully this helps someone else who's as clueless as me.

@Soulrak duet2 v1.03

@marco13 please stick to the thread you've already created and not spam this one

@dc42

A KUKA robot , it seems i was getting ''NOISE'' I have now contacted via a relay ! sorted

@Proschi78 i'm assuming you're wiring the ground side of the fan to out6buff

@o_lampe said in CAN connected heated bed? Sammy?:

@CNCModeller said in CAN connected heated bed? Sammy?:

The temperature is a little noisy as @dc42 suggested, it wanders +- 1 or 2 deg .

Does it happen with the bed rotating? Slip rings tend to produce noise too, so in many occasions a single signal is transmitted by two or more slip rings in parallel. That way the noise is cancelled out.

Hi @o_lampe, the slip ring sends CAN and 240v to the SammyC21 and heater so this shouldn't be an issue. I'm just testing at the moment however and the slip ring isn't being used yet.

Many thanks for the tip though.
Cheers
Barry M

@dc42 thank you, here is an alternative link from Stepperonline of the full kit. It should be the same hardware, just a different lable.

Stepperonline Servo Kit
The Datasheet is in the download sektion

Here are the broken links, I hope the'll work fine this time.
Leadshine EL6 Manual Dowanload

Leadshine EL6 Product Page

Leadshine ELM1S-1000FH80F-HH2 Servo

@skrotz They were sadistic. Black = 24v, Dark grey = ground, light grey = tach, and white = pwm control. PWM needs to be inverted. Hooking up 24v and ground to an always on fan port and control to fan2 ground works fine. It puts out a ton of air, but the shroud spreads it out less than I expected.

I haven't confirmed tach as working but seems likely it would, although I'm not sure it's useful.

@mrehorstdmd, just for the record, I did not post the original question, @TRATOON did and I just replied to it.
Also, I agree with your comment ....

@id_pqr it does. there are several ground connections in fact

@flipps does each fan spin when you connect it to the always-on fan output instead of to the Fan0 or Fan1 output?

@Phaedrux I will try to today or tomorrow. Still recovering here from all had over for turkey day.