I already know I’m in the mini section looking for help on the A1 standard. There doesn’t seem to be a category for that. If there is one, feel free to move this post where it belongs.
The pictures tell the story. But in addition to the crazy prints the machine is clanging and clunking so loudly I’m afraid it’s going to come apart.
Here’s a link you a YouTube video that shows how crazy it’s behaving. This is my third BL printer this year and nothing’s ever happened like this. You can stop watching after it gets through with its square dance. It prints normally after that. I didn’t know how to clip off the excess video.
Yes, I did go through the full calibration routine before attempting to print. Any help will be appreciated. https://www.youtube.com/watch?v=qPVMKKc1Kpk
Hi.
Is the printer right up against the wall? In the picture, it looks like the print bed doesn’t have any space to move backward.
And if the print bed can’t move backward, the belt will skip.
The bed needs space to move.
Hi,
you don’t have any space free on the back of the printer.
Besides it might be affecting the heat bed homing, it will also strain the cables and lead to failure - caution with electrical risks!
Bambu Lab recommends 195mm free space on the back of the A1.
I would give enough free space around the printer, do a new complete calibration
and test again your large square print.
Regarding strange movements during printing, you can check them in Bambu Studio if this is already there - it might have to do with the slicing.
Regarding the print head hitting hard, it looks that it doesn’t know where it is, maybe the homing was also affected by the heat bed issues. Check after the calibration, sorry I don’t have any idea at the moment.
That’s a great observation and I considered that too. My table is too narrow for my printers, so I have to pull them forward almost to the point of hanging off in the front. After the recall of the bed heating cable, BBL added a plastic protect presumable to keep you from pushing it too far back and stressing the newly designed wire. But after things went wacko, I considered what you said and dragged it forward enough so the bed was clearly not hitting. But you can hear the stepper motors grinding as if they’re missing steps. You may be on to it. Thanks
I think you’re probably right to suggest a recal. I did go through the new-printer calibration. I’m not sure how to call that up for a re-do. I no Studio has a button to click for calibration but I don’t know if it does the same cal as I did while setting it up. That’s the one I wish I could do. Obviously, I’m no where near the 195mm. I guess I’m going to have to turn the printer sideways. I can live with that if it cures my problem. Thanks
That seems to be the consensus. It still seems odd to me that it would do the square dance routine. But who knows. I’ll recal and move the printer. Thanks
It’s really a dumb machine.
What I mean is it takes commands and just does them. It doesn’t think about it, just process the g code. So when mechanical moves hit a wall, it really doesn’t care if the impact doesn’t break anything or trigger a failsafe. It’ll just move on to the next…move. When motion is imparied it’ll just skip steps till it can move again. By that time every thing is off by the amount of travel that was impaired, but it’ll keep trying.
Yep. You’re right of course. But just for the record, I didn’t think my bed was actually hitting the wall, but it was probably hitting the cable that was hitting the wall which would produce the same result.
And I just realized, I may have committed another error, I think I may have done the new-printer calibration with my P1S plate instead of the A1 plate. I don’t know if that would have affected anything or not, but I know these BBL machines do get information from the plate.
So I’m repositioning the machine, making some brackets to hold in in place, and then I’ll do a recal with the proper plate. Maybe it’ll all work out.
Have you already tightened the belt?
It’s possible that something became loose during transport or assembly. There are two spots on the printer where you can tighten screws.
Once you’ve tightened the belt, it will probably run better.
I don’t quite understand what you mean. If there’s a step loss and an obstacle has knocked the print head out of place, it recalibrates itself, doesn’t it?
My Kobra 3 doesn’t do that, but the A1 series can, right?
You just need to set it up in the printer’s settings.
I think I’m misunderstanding everything here. My English isn’t the best.
On the printer itself, you can start the same calibration as during the setup, with frequency and everything included.
I believe you can find it under Maintenance, if that’s what it’s called for you.
About what? I was just looking for suggestions on how to fix it. As to the question of self-recalibrating, I don’t have a clue. But I’m going to recalibrate it anyhow after I get through repositioning the machine.
