Excess filament before printing

[add1ct3dd]

So, I normally pre-heat my bed, so that when I start printing, my nozzle is on the bed and printing as quick as possible to avoid any dripping from the nozzle (this may suggest high temps but I've had it on my Prusa too).

Wondering how we can combat this, sometimes I don't have time to pre-heat the bed, so I just wait, meanwhile filament is being emptied all the time.

I'm wondering if we can make some start gcode to go to the edge of the bed at one of the sides, and then come in and start printing, that should hopefully deposit the material on the edge, to stop ruining the first layer of prints?

Usually I can catch it just before its finished heating up and starting to print, but not all the time..

Thoughts..?

[Eaglezsoar]

Would printing a skirt around the object accomplish what you want?

[add1ct3dd]

I already do that, but the problem I see is because the printer starts in the center of the bed, the material is deposited inside the skirt, rather than outside, so you get little bits usually stuck to the inside of the skirt, and once it finishes that, and starts the actual object, it embeds that as part of the object

[bot]

Start g code can resolve this in one of many ways. I just preheat both the bed and the nozzle to the print temps before selectin the file from the sd menu. Once I wipe the nozzle and it's up to temp I select file and it starts immediately. If a bit more oozes out on the way down I can quickly grab it with a small piece of card stock. Pla sticks well to it.

[add1ct3dd]

Ahh good idea, if I preheat both then there's no issue .

[bubbasnow]

make sure your bed gets to temp first then heat up the nozzle...because typically the bed gets hot alot slower the extra time the nozzle is at temp causes oozing. also you can program the nozzle to move down and away from the center before the print. When it starts to print it will move inward hopefully depositing any dangling.

[bot]

Yeah I was gonna mention that. Definitely warm the bed up first then start the nozzle heat.