@dc42:

The heated bed circuit has been tested at 15A. We're hoping to increase this rating, but not until we have done more thermal tests. Meanwhile you could turn the voltage of your 24V PSU down a little to limit the bed current to 15A.

Thanks for your help. I will keep that in mind

@StephenRC:

Microswitches using the NC contacts going to Ground and Signal pins. + and - would short the 3.3vdc power.

https://duet3d.com/wiki/Choosing_a_bed_heater has the specs.

Thanks

Aha I see. Thanks for clarifying that. It would probably be easier to just go with microswitches and use the + and - pins right?

And for the heated bed, will the mosfet support 17A peak (bed can consume up to 400W @ 24VDC)?

Yes but that is with a load connected as per the diagram shown in the spec sheet. It shows the residual voltage to be 3V. Alongside, the sensor is working on 5VDC right no (3 wires connected to the end stop pins on the MKS board which gives out 5VDC). Or am I missing something?

And to add another question: the heated bed peaks around 400W (operates at 24VDC) so can consume around 17A while heating up (initially). Will Duetwifi's power mosfet be able to handle this?

Thanks for looking into it. Yes it is an NPN normally open three wire type.

Since the sensor should work with >3V, can I directly connect it to 3V3?

Hello Everyone. New to this forum (but not new to 3D printing). Until now, I have been using MKS boards for my printers but decided to explore my options into the big league due to the unreliability of what I am using right now. The printer that I am thinking of getting duetwifi for is a Tevo Black Widow and the end stops are all Sunx GL-8 type inductive sensors. They are connected to the MKS boards in the same way as a duetwifi accepts end stops. Apparently, Smoothieboard also accepts the end stops in the same pin configuration as MKS/Duet (other than 5V vs 3.3V) but that board doesn't accept inductive end stops that easily (at least that's what I have read online and was told by the black widow group). I am not really sure why it wouldn't accept it since it can work with residual voltage of >3V.

So I am reaching out to you guys to see if I will be able to get those sensors to work with Duetwifi. It would be an expensive mistake if I can't get my existing setup to work.

P.S. I really like these end stops and hoping to keep it.

Thanks