undefined | Better HN

0 pointsTaylorAlexander6y ago0 comments

PETG. Specifically it would either be Hatchbox PETG or PushPlastic PETG.

0 comments

I'm very new into 3D printing scene, so far only been printed with PLA.

Also have some ideas that includes some motorised parts with gears. Do you think PLA is a bad choice for this?

For gears in general PLA is fine. If they have a lot of friction they will heat up and that’s where the PLA could fail. But PETG is very easy to print with! You’d need to adjust nozzle and bed temp but it prints very nicely. :)

PLA is fine to start with though. If you see failures you can switch.

djmips6y ago

Have you considered fibre reinforced plastic? I'm not an expert but I'm curious if that's a good option.

TaylorAlexanderOP6y ago

I’ve seen fiberglass reinforced nylon gears used with success in commercial injection molded gearboxes. It can definitely help by increasing gear stiffness.

However 3D printing with fiberglass causes rapid nozzle wear, and recently people are saying that fiberglass reinforced 3D printing filaments represent a human hazard.

Since I’ve managed to get my gears to work without reinforcement, I’ve not tried it.

One thing I do with printed gears is make the gear teeth much larger than would be strictly needed in an injection molded solution. This lets me deal with reduced material performance compared to injection molding.

zxzx6y ago

You might be interested in resin casting technique. It gives amazing results. Lcamtuf wrote a whole series about this:

http://lcamtuf.coredump.cx/gcnc/ch1/

and very nice article for make zine:

https://makezine.com/2014/03/21/resin-casting-going-from-cad...

double0jimb06y ago

Have printed many spools of CF and glass filled nylons using nozzles with tips made from ruby.

Check out “Hardcore Ruby” nozzles, now there are even diamond nozzles.

I print with 0.25mm nozzle in nylon, fine enough for Module=1.5 teeth.

A 0.15mm nozzle would make an acceptable Module=1 gear I would guess.

1 more reply

j / k navigate · click thread line to collapse

0 comments

huseyinkeles6y ago

I'm very new into 3D printing scene, so far only been printed with PLA.

Also have some ideas that includes some motorised parts with gears. Do you think PLA is a bad choice for this?

TaylorAlexanderOP6y ago

PLA is fine to start with though. If you see failures you can switch.

djmips6y ago

Have you considered fibre reinforced plastic? I'm not an expert but I'm curious if that's a good option.

TaylorAlexanderOP6y ago

I’ve seen fiberglass reinforced nylon gears used with success in commercial injection molded gearboxes. It can definitely help by increasing gear stiffness.

However 3D printing with fiberglass causes rapid nozzle wear, and recently people are saying that fiberglass reinforced 3D printing filaments represent a human hazard.

Since I’ve managed to get my gears to work without reinforcement, I’ve not tried it.

zxzx6y ago

You might be interested in resin casting technique. It gives amazing results. Lcamtuf wrote a whole series about this:

http://lcamtuf.coredump.cx/gcnc/ch1/

and very nice article for make zine:

https://makezine.com/2014/03/21/resin-casting-going-from-cad...

double0jimb06y ago

Have printed many spools of CF and glass filled nylons using nozzles with tips made from ruby.

Check out “Hardcore Ruby” nozzles, now there are even diamond nozzles.

I print with 0.25mm nozzle in nylon, fine enough for Module=1.5 teeth.

A 0.15mm nozzle would make an acceptable Module=1 gear I would guess.

1 more reply

j / k navigate · click thread line to collapse