Cool design.

Adding the ability to trigger a pause using one of the expansion header pins would be useful, we cant replace the erase button though because if invalid firmware is uploaded to a board, erase is required to reset the board so valid firmware can be uploaded via USB.

Makes perfect sense. I just noticed that "one of these things is not like the other".

Ah, I see. Thanks!

Thanks,
I read you all and this fully answer my question. I guess 25V shall be fine.
What is a typical pumping voltage when breaking up to 3-4 volts?
I guess it depends on how well the powersupply regulation electronics can sink reverse current and of the stepper inertia and inductance.
We had a problem like this on one of our electronics and we had to change the regulator to cope with it.

Good thing about the psu on!

@dc42:

As Tim says, the limitation is the stepper drivers, which are rated at 30V when the motors are powered, and motors pump energy into the supply rail when they are decelerating. The other components are rated at 35V or more. A future revision of the firmware will disable the drivers if the bus voltage exceeds about 29V.

Is there a reason why you want to use more than 25V?

The remote power on/off facility on the Meanwell PSUs appears to be compatible with the implementation on ATX PSUs, so it ought to be work with the Duet WiFi PS_ON output.

For the lower current connections such as PT100, you can use a JST style 2.54 connector pin. There are different types from 2 pins to 20 pins and they have a locking feature to prevent accidental demates. There is no point in routing the PT100 and hot end on same connector unless you split the hot end into multiple pins to reduce the current through each pin. If the connector is rated for high current, it would be large, and vice versa for smaller connector. You always way to keep the high current connection on a different connector.

Phil 51C at 2A, with your lower ambient temp and airflow does not sound unreasonable compared to our results. That's for doing the additional tests, it will be interesting to see in 6 months time when your ambient temp is slightly different!

Hi David

Will do a total rewire near hotend for more modular handling.

Was very happy with my board. Fixing the SMD mosfet i can probably do, but not a chance with the SAM3XE…

As I wrote before i could take a black/blue as the replacement (#257) 😉
Getting all shaky not being able to print 😉
And I just got the bed calibrated almost perfectly too 😞

For using them (pt100) since one week i can just say great ! Really easy to plug and setup.

As Doug says: you need the Duet WiFi, the PT100 daughter board (one board will handle two PT100s), and optionally the PanelDue. The IR sensor supplied with BigBox is the one I manufacture anyway.

I finally tracked it down. I had a couple wires crossed. This also, unfortunately, explained why I melted my hotend this weekend. Thanks.

@dc42:

I presume you have a single hot end, also with a PT100, and the dual PT100 daughter board. In which case, you have a spareb PT100 channel anyway. Why not connect both the thermistor and the PT100? You will be able to switch between them in firmware.

@ DC42. Yes, that's what I was planning to do.

@All. Thanks for the info and tips guys.

I have now documented how to connect several different sorts of Z probe at https://duet3d.com/wiki/Connecting_a_Z_probe.

One solution is to feed mains to the PSU via the NO contacts of a relay. Also connect a mains-rated NO push button in parallel with the relay contacts. Connect the relay coil between the PS_ON output of the Duet and either +5V or +12V. Don't forget the flyback diode across the relay coil.

In config.g put command M80 near the start, to turn the relay on. To start the printer, press the push button and hold it until the relay turns on. Then you can use command M81 to turn the printer of. This can be done in your end gcode. Don't forget to put a G4 delay command before it, to allow the hot end fan to cool the hot end down first.

One disadvantage of this approach is that whenever you do a software reset, the printer will turn off.

Thank you David.

They are for PanelOne and compatible 20x4 text displays with 3.3V signal levels. As mentioned in the documentation, the firmware support for them has not been written yet.

Currently the Probe connector is only for sensors that can produce an analog output, such as my IR sensor. As Doug says, ignore the MOD pin. Other sorts of Z probe should use the E0 endstop connector and probe type 4 in the M558 command in config.g.

I plan to add probe type 5 which would be a probe with a digital output but connected to the Probe connector instead of E0 endstop.

I Have it sorted it appears the Default max Hotend temp is 262 degrees haveing set it to 290 I have managed to tighten the E3D Nozzle correctly

M143 S290 did the trick updated the panelDue anyway as it need doing

The duet board itself for the panel due and ir sensor plugs is perfect and no issues from manufacture