The Purge line at the back from my Bambu Lab X1C is off the engineering plate. Can someone with experience in the G-Code tell me how I can move it forward by about 1cm? See the image attached.
Cheers
Can you remove the cover of the print head and observe the nozzle front and side on (two views).
Does it appear bent?
Share photos if you can.
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Unfortunately, that is your answer.
Now, you need to remove it and see if it can be bent back without further damage.
If it is bent that much though, it is likely the hot end is now useless as the filament path will likely be compromised.
Depending on where the bend is, you may be able to swap the hot end with the spare that came in the printer box.
Otherwise, you need to order a new one if you haven’t purchased your own spare.
A bent hot end usually occurs when it strike something on the build plate it didn’t expect to find. Commonly this could be a prime tower or a model nit removed before the next print started.
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Ok that makes sense.
I am not able to exchange the hot end on short notice right now, however. There are quite a few prints I have to get done before Christmas and the issue has been around for a few weeks already (with quite some prints since) and apart from the off-centering, the printer has been working well. So I don’t dare to try and bend the hotend back as of right now.
Which brings me back to my initial request as a hotfix: How can I just move the purge line 1cm down so that the nozzle won’t be hit by that corner piece which is slightly higher at least?
Thanks for your insight on the hot end. I will try to get it fixed after Christmas asap.
Think I managed to do it.
In Printer Settings → Machine gcode → Machine start G-code, look for
G1 X128.0 Y253.0 Z0.2 F24000.0;Move to start position
and change it to
G1 X128.0 Y243.0 Z0.2 F24000.0;Move to start position
Then also alter the lines below
G0 X253 E6.4 F{outer_wall_volumetric_speed/(0.3*0.6) * 60}
G0 Y128 E6.4
G0 X252.5
G0 Y252.5 E6.4
G0 X128 E6.4
to
G0 X243 E6.4 F{outer_wall_volumetric_speed/(0.3*0.6) * 60}
G0 Y128 E6.4
G0 X242.5
G0 Y242.5 E6.4
G0 X128 E6.4
Just to be sure I also altered
G0 X135 Y253 F20000 ; move to exposed steel surface edge
to
G0 X135 Y243 F20000 ; move to exposed steel surface edge
beware that you lose 1cm on the y-length to print on like that which you have to account for when positioning the mesh but it does the trick.
I understand you have an immediate need and delivery times are horrendous right now.
I ask that you be cautious with the printer and monitor it more rigorously as you are liable to more print problems and at worse, further unrecoverable damage.
Good luck.
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The printer ships with a spare .4mm nozzle in the parts kit
Yes, it does.
So I saw you got the bent nozzle part figured out. But, if you update your firmware that rear line is no longer there. They’ve moved it to the front.
No need to change any machine start g code.
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Unless the print jobs that are so urgent the OP can’t wait for a new hot end extend to parts of the plate the bent nozzle can’t reach or falls off the build plate.
With the nozzle being bent the way it is, there’s a high likelihood the print quality will suffer. OP should have been prepared for a situation like this if their prints are that important.
I wonder if they’ve used the spare yet?
I do indeed still have the spare nozzle that came with the printer. Frankly I don’t dare even exchanging it right now, call it superstition but my reasoning is “as long as its damaged, but works, I’d better not touch it” apart from basic maintenance that is. Only 4 more days and I will definitely exchange it and keep you updated. As of now, the prints have been surprisingly clean still and I’ve been printing like that for weeks, because I didn’t even notice the bent nozzle, which is the main reason I’m not so concerned about an immediate breakdown if I do a few more prints. I once started a new print remotely after forgetting to remove the old print as @MalcTheOracle accurately described. That is months ago, however, and I’m certain this is the reason for the bent nozzle.