Contamination of the print bed due to cleaning of the hot end
One problem we have with our XL 5T FW 6.1.3 is that the printer cleans the nozzle at the front of the print bed before each print and then moves to the back with a hot nozzle for the tool change. As a result, we often have strings that the nozzle pulls across the print bed and later leave traces that can be seen on the components. This is problematic with light-colored filaments. It would be nice if there was an option for the nozzle to clean itself at the back, where the tool heads are, so that any stringing does not run the full length of the print bed.
RE: Contamination of the print bed due to cleaning of the hot end
Agreed. I've had the same issue and it makes you babysit the print in the beginning to catch these things.
It's a great printer, but there are so many little details that are extremely annoying. Seems to me they are so busy pushing out new products they are not applying resources to improve this machine. I've been a loyal customer, but not sure I'll buy another machine from Prusa. Sad to say.
If the nozzle cleaning or bed probing are leaving 'zits' on the print sheet then your filament is probably damp and therefore oozing under steam pressure.
Cheerio,
RE: Contamination of the print bed due to cleaning of the hot end
Filament moisture is not the issue. I feed out of a Stat Pro dry box at less than 5% humidity. I get oozing regardless.
RE:
I have got this occasionally, but usually only with TPU.
Agreed there's not an simple fix, but honestly I always sit around to watch the first layer get started and grab the string then.
A solution could be for the firmware to just change the path the tool takes back to the dock. It could go down the left or right side of the sheet off of the printing area rather than across it.
Maybe put in the suggestion on GitHub?
You could also try lowering the first layer temperature for the problematic filaments. The first layer prints relatively slow anyways.
RE:
Yeah, all those things are possible. But why aren't these solutions offered by Prusa in the software/firmware? The bar has been raised and they're not competing. They got the XL to a passable state and then just moved on to all their new products. I don't want to babysit my printer anymore.
RE: Contamination of the print bed due to cleaning of the hot end
Yeah, all those things are possible. But why aren't these solutions offered by Prusa in the software/firmware? The bar has been raised and they're not competing. They got the XL to a passable state and then just moved on to all their new products. I don't want to babysit my printer anymore.
Put it in a request on GitHub. That is where the Prusa team finds reported bugs and feature improvements. They didn't look here. This is a user forum.
GitHub is the place to report issues and feature requests.