Newbie Here!!
I unboxed my new P1P printer as per the video.
I double checked every step up to doing a test print.
Everything looked fine.
I selected the smallest simplest file on the micro SD card as a test.
As it started to do the print there was a sharp sound like plastic being bent or broken or flexed.
I stopped immediately and inspected the printer.
It appeared nothing is broken.
In order to reproduce the problem, I proceeded as follows:
Using Bambu Studio, I send the toolhead to the auto home position.
I move the toolhead in the +Y direction to its limit position.
I then move the toolhead in the -X direction until it is positioned over the purge chute. The chute lever swings gently out of the way to allow this.
I can now observe that the purge chute lever is under the toolhead as it should be.
I can then see clearly that if I move the toolhead in the -Y direction, the rear cover plate of the toolhead will strike the chute lever.
The chute lever has not enough movement to be dragged clear of the toolhead rear cover.
If I then DO proceed to move the toolhead in the -Y direction, there is a sharp loud crack as the top of the chute lever is forced to bend and clear the toolhead rear cover.
I feel I am missing something, but any comments or advice would be appreciated.
Thank you.
I have been in contact with Bambu Support but I just got copy/paste responses.
I described how I can reproduce the problem, but they didn’t comment.
They have just sent me a replacement chute. It looks identical to the one in the machine.
Toolhead purposefully hits that arm.
Do a print and let it do it’s thing.
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Thank you for your interest.
Yes, it strikes it normally in the +Y direction, to joggle the poop in the chute.
But if the lever is under the toolhead, and the toolhead moves in the -Y direction, it tries to snap off the chute lever. The noise is too loud and sharp to be normal. So far it hasn’t snapped the lever. But it will. So I thought!!
THEN: (as you suggested)
I risked a short print and it worked!!!
It appears that during normal operation, if the chute lever is under the toolhead, the toolhead is never moved in the -Y direction. It is only moved in the X direction to get it clear of the chute lever.
By positioning and moving the toolhead manually (as described in my OP), I was doing something that does not happen in normal printing.
My bad.
Please tell me that I am talking sense!!
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That lever arm is able to move in both the X, and Y direction. The toolhead will push against the lever in the Y axis when it starts a print to get filament prepared for printing.
If you watch a print start, you will see that it pushes on the arm to “close” the flapper in the purge chute. The purpose of that is to coil the purging filament into a ball that will fall down the purge chute. Absent that, you would have a long strand of .4mm (nozzle diameter) that would probably not fall into whatever container you have to catch those balls.
If you do a multi-color print you will see it do that for every color swap.
I think it was pretty ingenious of the engineers at Bambu Lab to figure that out.
Thanks again.
Yes, I got all that.
Your interest was much appreciated.
Take care.