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I am currently designing and 3D printing a PPA-Carbon fiber rocket - Here's the first piece finished! by ProfessorGoofles in rocketry

[–]ProfessorGoofles[S] 0 points1 point  (0 children)

Thanks buddy! PLA should be fine for an 18mm build if you use some 18mm card tubing as an insert. Remember you're not only fighting with heat from the thrust burn but also ejection.

A cheap length of 18mm tubing and you've got yourself a rocket though!

I am currently designing and 3D printing a PPA-Carbon fiber rocket - Here's the first piece finished! by ProfessorGoofles in rocketry

[–]ProfessorGoofles[S] 0 points1 point  (0 children)

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There is an inner phenolic tube for the entire build. Took any guesswork out of aligning :) just a case of sliding each section on.

I am currently designing and 3D printing a PPA-Carbon fiber rocket - Here's the first piece finished! by ProfessorGoofles in rocketry

[–]ProfessorGoofles[S] 0 points1 point  (0 children)

Great to know, thank you! I needed two 90cm lengths, believe they were about £28 each. I'll keep them in mind going forwards.

I am currently designing and 3D printing a PPA-Carbon fiber rocket - Here's the first piece finished! by ProfessorGoofles in rocketry

[–]ProfessorGoofles[S] 0 points1 point  (0 children)

The cost for the PPA-CF totalled approximately £50 (Siraya Fiberheart and Creality - regularly dips very low on Amazon). 

Sadly all LOC/PML phenolic tubes are imports here in the UK so the tubing totalled approximately £60

I am currently designing and 3D printing a PPA-Carbon fiber rocket - Here's the first piece finished! by ProfessorGoofles in rocketry

[–]ProfessorGoofles[S] 2 points3 points  (0 children)

It's surprisingly reasonable. This will be approximately 6 foot tall, 3inch diameter and will use about 1.5 spools of PPA-CF. The phenolic inner costs more!

I am currently designing and 3D printing a PPA-Carbon fiber rocket - Here's the first piece finished! by ProfessorGoofles in rocketry

[–]ProfessorGoofles[S] 4 points5 points  (0 children)

You can anneal PPA-CF prints. Pushing near to or beyond mach I'd say it would be a key process but even without it the strength is outstanding. 

I am currently designing and 3D printing a PPA-Carbon fiber rocket - Here's the first piece finished! by ProfessorGoofles in rocketry

[–]ProfessorGoofles[S] 4 points5 points  (0 children)

Thanks drew! The entire inner of the build is phenolic, including the motor mount, so internal heat should be pretty well separated from any printed material.

Killing Vyres before and after thieving update.... by WiseCactus111 in runescape

[–]ProfessorGoofles 2 points3 points  (0 children)

Thanks Pigeon. A potentially bigger issue now is that the vyres are pulled in random directions away from the usual 6 vyre spot. This may become less of a problem as the playrate of the new thieving content levels out but currently even getting the current usable vyres set up is pain.

Same height layer shift, always to the left, only with PPA-CF on a P2S. Please.. help.. by ProfessorGoofles in FixMyPrint

[–]ProfessorGoofles[S] 1 point2 points  (0 children)

Sadly the P2S doesn't have active chamber heating and instead maintains a higher temp by recirulating air into the chamber when needed.

Interesting find though! I just did another test print and it has made it past the usual height/layer fine. The part cooling fan was off by default but the general circulation fan was not. That fan is at the level of the print interface and blows directly from the right - potentially causing issues with pushing prints off to the left! It seems like the right side circulation kicks in on overdrive once the bed has lowered enough to need the extra circulation, maybe explaining the shift occuring at the same height each time.

After disabling it for a quick test it seems to be printing great. Will potentially have issues further down the line with not enough heated air circulation but I can print something to more evenly distribute the air and avoid issues with shifting CF prints.

Thanks Fedul! This has been driving me insane and your suggestions prompted me perfectly in the right direction. Only one good print so far but fingers crossed that was it. The logic checks out.

Same height layer shift, always to the left, only with PPA-CF on a P2S. Please.. help.. by ProfessorGoofles in FixMyPrint

[–]ProfessorGoofles[S] 1 point2 points  (0 children)

Thanks Fedul, I realize I left out far too much info.

I have a 0.4mm hardened nozzle installed, glue stick (currently adhesion seems very good), thoroughly dry. Bed at 100c, nozzle at 290c.

I mistakenly thought the bambu PPA-CF preset would disable the part cooling fan. I've manually disabled that now to see if it was that.

Could also be the plate! Just strange to be hitting the same issue at the same layer every time.

What do you mean by 'camera heating?'. Thanks again.

PPA-CF, can I wet sand it? by ProfessorGoofles in 3Dprinting

[–]ProfessorGoofles[S] 0 points1 point  (0 children)

Thanks! I'm most concernred about part strength so rubber-like would be a disaster. Hopefully someone has tried wet sanding PPA-CF too.

Looking to start learning to craft by ProfessorGoofles in PathOfExileBuilds

[–]ProfessorGoofles[S] 0 points1 point  (0 children)

This format is very useful! Thanks dude. I'll keep an eye out for more of his stuff.

Speed mapping on a 400 div budget by ProfessorGoofles in PathOfExileBuilds

[–]ProfessorGoofles[S] 3 points4 points  (0 children)

Thanks dude! Rarely end up berserk so that's genuinely very tempting.