Endstop wiring and useless documentation:

xxexx

The manual says: “…connect one wire to GND and the other wire to signal (the outer two pins). “ - but there is no “signal” pin on the whole Duet 2 board: do you mean the x/y/z “STOP” Pin?

And what do you mean with “the outer two” pins? That would mean that out 3 pins only the one the left and the one on the right should be connected (with the middle pin left unconnected), but in the picture you mark the left and the middle pin?
So what is ist now, left and middle or left and right?

A Former User

Depends on the type of endstop, most are plain microswitches, normally closed and wired to ground and x/y/z-stop. middle pin is +3.3v for other types of sensors

xxexx

That does not answer my question - why do you refer to a "signal" pin that
does not exist on the board?

droftarts

@xxexx said in Endstop wiring and useless documentation::

The manual says: “…connect one wire to GND and the other wire to signal (the outer two pins). “ - but there is no “signal” pin on the whole Duet 2 board: do you mean the x/y/z “STOP” Pin?

Where are you reading that? See https://duet3d.dozuki.com/Wiki/Connecting_endstop_switches#Section_Microswitch

connect the switch between GND and STP/IN. These are the outer 2 pins of the 3-pin connector.

Also see https://duet3d.dozuki.com/Wiki/Connecting_endstop_switches#Section_Duet_WiFi_Ethernet_and_0_6_0_8_5_endstop_inputs on the same page.

Ian

A Former User

@droftarts said in Endstop wiring and useless documentation::

connect the switch between GND and STP/IN.

silk screen say stp, but wiring diagream doesn't say in for the duet2 at least. (but op is more concerned about being angry than informative so who knows what board it is refered to)

droftarts

@xxexx Okay, I found what you're referring to: https://duet3d.dozuki.com/Guide/2.)+Wiring+your+Duet+2+WiFi-Ethernet/9#s28

I've updated the wording. Effectively signal = sense = STP (used on Duet 2) = IN (used on Duet 3).

Ian

xxexx

"...on the whole Duet 2 board..."

would be helpful if you would actually read posts that you comment on...

xxexx

@droftarts exactly, i could not reply that link, as i did lack privileges - should be working now.

Thanks for the correction.

A Former User

@xxexx said in Endstop wiring and useless documentation::

"...on the whole Duet 2 board..."

is ambiguous unfortunately.

xxexx

@bearer What exactly is "ambiguous" about that - take a look at the Duet2 board layout and tell me where you can find the word "signal" on the endstop pin denomination?

droftarts

@xxexx It's ambiguous because 'Duet 2' could be either 'Duet 2 WiFi / Ethernet' or 'Duet 2 Maestro', which are different products. Or it could have been a mistake and you meant Duet 3! Particularly as you didn't link to the instructions you were using. However, you're right, it doesn't say 'signal' on any of the Duets.

The documentation did (and still does) say to use the outer two pins.

... but in the picture you mark the left and the middle pin?

The picture just shows where the connectors are, not which pins to connect to. See the wiring diagram for a better description of the pins: https://duet3d.dozuki.com/Wiki/Duet_Wiring_Diagrams

Ian

A Former User

The Duet 2 diagram also shows that the colour GREY in the key as I/O (which just happens to be the colour used on the stp pin in the diagram) so anyone with a modicum of common sense "should" be able to work it out, but evidently not.........

xxexx

@CaLviNx I don´t have a manual in order for me "to work things out" - if it says "signal" in the manual, then there has to be a "signal" pin in the layout.

Anything else is an error in the manual.

A Former User

@xxexx said in Endstop wiring and useless documentation::

@CaLviNx I don´t have a manual in order for me "to work things out" - if it says "signal" in the manual, then there has to be a "signal" pin in the layout.

Anything else is an error in the manual.

You dont need a manual, you do however need an operational brain, and the contradictions in your post show you are somewhat lacking.

xxexx

@CaLviNx grow up - you did not actually contribute anything, but criticize me for not using my brain?

I did follow the instructions step by step and i allready found several mistakes - btw acknowledged and corrected by Duet allready - so i helped to improve the manual for me and also for others.

So grow up or stay away if you dont want to contribute.

fcwilt

@xxexx said in Endstop wiring and useless documentation::

@CaLviNx I don´t have a manual in order for me "to work things out" - if it says "signal" in the manual, then there has to be a "signal" pin in the layout.

Anything else is an error in the manual.

"Signal" in this case is the generic term for the input pins whose names may vary with connector and board type/version.

Consider the Duet 2 WiFi pin names of GND, +3.3V and E0 STOP.

GND and E0 STOP are the two outer pins.

Is it not obvious that you would connect your end stop switch to GND and E0 STOP?

Frederick

xxexx

@fcwilt Actually it make a lot more sense to let a mechanical endstop switch connect e.g. 3,3V to a signal input. Open Switch - no Voltage on signal input - closed switch 3.3V on signal input.

But connect ground to a signal input?

64bit

@xxexx

Is how you bring a floating signal and turn it into a LOW signal.

xxexx

@64bit Absolutely, but is that the obvious way to use an endstop?

fcwilt

@xxexx said in Endstop wiring and useless documentation::

@fcwilt Actually it make a lot more sense to let a mechanical endstop switch connect e.g. 3,3V to a signal input. Open Switch - no Voltage on signal input - closed switch 3.3V on signal input.

But connect ground to a signal input?

That is actually very common for a number of reasons.

To simplify a bit:

You want a disconnected pin to go to a valid logic level, either low or high.

There is a resistor on the board/chip that can pull the input to a logic high state when the input connection is missing or open.

Then you have your external switch that pulls that input to ground, the logic low state.

It simply is "easier" to pull an input to ground.

And in any case the docs said the two outer pins.

Frederick