UM0+ Endstop switch dont work properly

[hambut 0]

Hello all,

ive assambles my UM0+ and for the first few minutes the endstops (x and y axis) worked normally. But after 2 days now i installed the UM0+ again as a new machine. For this cura wants to check everything and when the check says 'push the x axis Endstop' and i push it he dont detect it. Then i push again and again and then after pushing it about 10 to 20 times he take the signal and wants to get the y axis signal. Here i have to push 3 to 5 times. The z axis needs 2 pushes.

When i now Start the printing nothing else than an terrible sound of hitting with the heater head element against the um0+ cave can happen.

Are the endstops damaged?

[DidierKlein 729]

You activate them with your finger or by moving the head?

It might be that you need to readjust them again (maybe they moved a little during the first days?

 

[hambut 0]

Thank you for your response. I activate them with my fingers

[gr5 2,172]

You need to test them with a multimeter - test the wiring also. So disconnect them undereneath the UMO with power off and measure the resistance, then push the endstop. The resistance should toggle between open (infinite resistance or at least > 100K) and shorted (or at least <5 ohms).

 

[hambut 0]

Thank you, i will try it tomorrow and give here an update!

[hambut 0]

The switch is OK. At home i will take a look at the pins in the platine. Maybe one is broken or sth. like this. My favourite is that the platine is damaged, because the ukticontroller also shows just zeros and some mathematical Symbols and chinese symbols. Is there an option to check this at home?

[aviphysics 9]

For the ulticontroller, is it possible the cables are switched? IIRC, plugging the wrong cable into the wrong slot will cause the ulticontroller to display strange symbols.

[hambut 0]

Hey,

i ve changed also the cable connections. Same bug.

My reseller send me a new Ulticontroller and now i shows what it should show ;-) still the bug with the not directly reacting switches.

[amedee 349]

If you think the UltiController is the problem, you can disconnect it completely and try to print directly from Cura.

You do not need the controller for printing, the printer is fully functional without it. So this will help us to see where the problem is...

 

[hambut 0]

Hey

thank you. Yes, ive also disconnected the controller and tryed without. Same problem..when im installing a new maschine i have to put several times on the switches to send one signal.

When i start an printing procedur i put the heater in the right top corner and then he moves to the bottom left corner without hitting the frame. I can live with this way. Maybe its normal to press the switches several times when installing the maschine?

[amedee 349]

Maybe its normal to press the switches several times when installing the maschine?

 

I never run the checks from Cura, so I cannot comment on that, but it does not seem right to me...