I had this happen to me yesterday, it has never happened before. I was performing the maintenance procedure for cleaning the print head. I normally do this manually without using the menu system. For some reason I used the maintenance menu to clean the head yesterday, this is the first time I have used this feature since I have owned my UM3. I have done hot and cold pulls manually in the past many times in the past though. At the start of the procedure when the print returned to the home position the problem occurred. I thought it may have been an aberration caused by some dirt or other issue so I tried again using the menu system. The same problem occurred. I therefore performed the hot and cold pulls without using the maintenance menu.
Strange thing is that the printer performed normally after this during normal printing operations.
Lesson learned for me - don't use the maintenance system for print head maintenance.
My guess is that the home position for the automatic procedure is not correct or the range is too specific.
Anyone else had this problem (excepting the responses above).
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gr5 2,224
I'm very familiar with the "dadadadada" sound. It sounds horrible but the printer will not be damaged.
It could be intermittent. Try homing 10 times. It could be a bad wire but more likely the switch is at the edge where sometimes it clicks/triggers and other times it doesn't. Push the head around towards the corner (back left) and listen for the limit switches to click. Do one at a time - so push the head to the left edge and to the rear edge separately.
The X switch has two screws close together holding it on the top rear of the printer. Usually the fix is to bend the metal part of the switch out a bit so it clicks sooner.
The Y switch is triggered by one of the rods that passes through the head - the rod sticks out beyond the left slider block and hits the switch. Usually the problem with this one is that the rod moved and isn't sticking out far enough so somtimes it misses.
The problem could also be electrical or a faulty switch or a damaged wire but usually the problem is mechanical.
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dminsb 0
Thank you for the reply! :)
Ok I'll try the way you provide me when I return my office.
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