Z-Endstop problem

Dear all,

I have a problem with my Prusa Mendell running on a Ramps 1.4 and Marlin firmware that just arose. Before everything was working fine.

I haven't used the printer in a few weeks, but now the Z-axis will not home or move down anymore, only upwards. When I try to move in down in printrun it say it shows "echo:endstops hit: Z:7.00". I checked the endstop and that isn't broken. Trying different settings for the Z-axis in the firmware aren't helping so far.

The board had been connected to the power source during the time it was idle... but I can't imagine the would have shorted out a circuit like that right?

I need your help please I need the printer now because I made some (non related) modifications to it for my graduation in 4 weeks and I really need it up and running

Regards,
Mathijs

Hello,

Are you sure you didn't turn the cable plug on your ramps board? Try to turn your plug on your ramps.

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Charlie

Send me a pm it can be the cable thats causing the prob or not pluged in properly

Charlie

No it's not the cable. I checked all that with a multimeter.

I kind of worked around it... in the Marlin firmware I found some the code that designated the pins and I set the pin for the Z-max endstop to be the Z-min endstop and connected it, now it works again.

I guess something in the original z-min pin circuit broke... which suck because now I can never use z-max endstop (care?!)

Thanks for you reply, but problem solved for now!

Would you mind sharing where do you find the pin codes? I am having similar problem. Thank you!

Pin allocation is done in pins.h

what firmware you running? also how many endstops are you using?