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[Solved] Problem with Y axis stop  

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ManganLabs
(@manganlabs)
New Member
Problem with Y axis stop

All,

When my Prusa i3 MK2s starts printing, it doesn't stop when traversing the Y axis during the calibration phase. There is a limit switch there, and it seems to hit it fine, but it seems to be ignored.  After this happens, the printer works fine with no issues at all.  I don't want to ignore it because I'm sure it will wear out my belts pretty quick.

You can see the problem here:

Thoughts?

Best Answer by ManganLabs:

Finally solved this today, but I’m confused as to why this wasn’t a problem since day 1.

It ended up being a tiny bit of excess belt from the Y axis that was preventing the connector from hitting the limit switch. That excess has always been there, but this problem did not always occur. 

I trimmed the slack close to the connector, and then it worked fine.

...
Posted : 27/02/2021 2:04 pm
JoanTabb
(@joantabb)
Moderator
RE: Problem with Y axis stop

 I take it, that the y axis endstop used to work, have you changed anything? 
check  your Y axis endstop by manually operating it as soon as the y axis starts moving. 
If it doesn't work, then the switch may be faulty 

if the button goes in and out, check the switch resistance changes between o ohms and infinite ohms

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 28/02/2021 2:29 am
ManganLabs
(@manganlabs)
New Member
Topic starter answered:
RE: Problem with Y axis stop

Finally solved this today, but I’m confused as to why this wasn’t a problem since day 1.

It ended up being a tiny bit of excess belt from the Y axis that was preventing the connector from hitting the limit switch. That excess has always been there, but this problem did not always occur. 

I trimmed the slack close to the connector, and then it worked fine.

...
Posted : 28/03/2021 1:29 pm
JoanTabb
(@joantabb)
Moderator
RE: Problem with Y axis stop

over a period of time the microswitch action may 'relax' and activate in a different position. 
this is likely to need progressively more movement as the switch ages. and is likely to be intermittent for a while...

Probably worth ordering a new switch to have in stock... 

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 28/03/2021 1:43 pm
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