PrintShift 5.1 Ejecting at ERRF

Рет қаралды 1,735

9 ай бұрын

No updates to the printer yet... but thanks to the awesome ERRFlings from Nova Labs I had some time at the booth to do a better video on the PrintShift ejecting parts.
In short, raising the Z axis pulls the string which actuates the rack by rotating it into the pinion. At that point, the printer's Y axis is shuffled backwards and forwards 90mm at a time to roll the part off the bed. The pinion only drives in one direction thanks to an integrated one-way bearing - so as the bed moves forwards it advances the belt.
The gear ratio between the pinion and the drive roller is 1:6 - so each 90 mm cycle advances the belt 15mm. This is still very early in the life of this ejector - I kept the speeds are low and slow so that it doesn't hurt itself while on display.
Bonus ejector at the end!
LINKS:
ERRF 2023 - the East Coast RepRap Festival: eastcoastreprapfest.com/
PrintShift 5 github: github.com/paenian/PrintShift...
Autodrop3d: www.autodrop3d.com/ - this is still an evolution of Mike's awesome idea - thanks!
Support the project!
/ printshift
Project GitHub - PrintShift is open source! Build along and make your Mini a proper factory!
github.com/paenian/PrintShift

Пікірлер: 9

@LimpiezasMyG 9 ай бұрын

I love the printshift! has tough competition with the pancake belt now in my heart!

@PaulChase 8 ай бұрын

I was going to post a disassembly of the pancake bot but the hotel staff kept interrupting

@AwestrikeFearofGods 9 ай бұрын

Very clever. What were your concerns about the string, specifically? You could route it through a Teflon Bowden tube if you wanted to protect it from fraying, but that would add a bit of friction against the inside of the tube. Otherwise, you could route it around small pulleys. They could be as small as a 608 skate bearing.

@PaulChase 9 ай бұрын

Not the string so much as that it's just dangling could easily catch on something. Routing it is a little challenging cuz it's only tensioned for about 20mm of Z travel, and needs to coil up or something out of the way for the rest of printing. Pre-tensioning it with a key leash, adding some pulleys and guides would sort it out

@noxin75 9 ай бұрын

Thanks for the video, definitely showcases the feature! In terms of a replacement for the string, maybe a key leash? Like people used to keep the ptfe/cable bundles off the beds of larger printers a few years ago?

@PaulChase 9 ай бұрын

key-leash is a great idea! Main issue with the string is the slack, but those are also meant to be durable - key leash plus some guides'd do it nicely.

@jaesaber8883 9 ай бұрын

Im planing on building either version 4 or version 5 when it comes out. I am having trouble finding the .2 mm kapton film for the build. Your link in github takes me to a 0.1 mm Kapton film, the next options would be a 0.18 or 0.225 mm.

@PaulChase 8 ай бұрын

I would go with the .18 - flexibility over durability. For larger rollers thicker is better but the PrintShift is trying to be very compact