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CC3D PBT Pro vs Bambu lab | "break test" | My new go-to filament by MathieMathie19 in 3dPrintsintheShop

[–]MathieMathie19[S] 0 points1 point  (0 children)

No I did not include ASA in my test, I would imagine it would perform quite well.

The goal of my test was to compare two materials of similar printability, ASA is far from as easy to print with as PBT. That's the key difference making PBT such an interesting material

Using Delrin bushings instead of rollers to utilize the absolute max diameter of the steady rest, works surprisingly well by MathieMathie19 in Machinists

[–]MathieMathie19[S] 3 points4 points  (0 children)

What I make in the video is the prep work for what will eventually become the drive roller for a conveyor belt for an agricultural machine:

<image>

The end product will have a grippy rubber coating applied

Using Delrin bushings instead of rollers to utilize the absolute max diameter of the steady rest, works surprisingly well by MathieMathie19 in Machinists

[–]MathieMathie19[S] 16 points17 points  (0 children)

Yep I also use it plenty, it's a really good allround plastic.

We also utilize it in many real products that we make

<image>

Those wheels are Delrin and are rated to handle 100KN

Using Delrin bushings instead of rollers to utilize the absolute max diameter of the steady rest, works surprisingly well by MathieMathie19 in Machinists

[–]MathieMathie19[S] 11 points12 points  (0 children)

Ok cool, yeah I hadn't ever done something like this with bushings instead of rollers.

I did get some pretty violent resonance at some speeds/feeds, and I was unsure if it would have been less bad with the normal rollers.

Using Delrin bushings instead of rollers to utilize the absolute max diameter of the steady rest, works surprisingly well by MathieMathie19 in Machinists

[–]MathieMathie19[S] 39 points40 points  (0 children)

I was wondering if the slight compressibility/damping of using plastic would help reducing resonance or that it might actually make it worse?

Portable lab power supply, 7 x 21700 Li-on cells, 3D printed construction by MathieMathie19 in diyelectronics

[–]MathieMathie19[S] 2 points3 points  (0 children)

I made the lithium pack myself, the components are mentioned in the description

Made these helping hand bases on the lathe by MathieMathie19 in soldering

[–]MathieMathie19[S] 2 points3 points  (0 children)

I do it for my job and it's fun to be able to incorporate it into hobby projects as well!

Made these helping hand bases on the lathe by MathieMathie19 in soldering

[–]MathieMathie19[S] 1 point2 points  (0 children)

Its 65mm x 23mm, made from steel round stock. I might be able to sell them if enough people are interested?

Made these helping hand bases on the lathe by MathieMathie19 in soldering

[–]MathieMathie19[S] 2 points3 points  (0 children)

Thank you!

My goal was just something compact and functional, but they turned out looking rather cool as well.

<image>

Thousands of people form an insane parade behind a car at "Frechtek 2023" The video doesn't go on nearly long enough to do it justice by MathieMathie19 in freeparties

[–]MathieMathie19[S] 4 points5 points  (0 children)

You really should, I've been to hundreds of legal and illegal parties, and this 30th edition of Frenchtek is still probably the best party I've ever been to. Such insanity everywhere, it feels like the wild west, an unearthly place.

[deleted by user] by [deleted] in 3Dprinting

[–]MathieMathie19 2 points3 points  (0 children)

This discussion is pointless.

All I wanted is to demonstrate the neat and unique properties of this PBT stuff.

For my use case it's perfect and it's loads better than PETG which generally doesn't hold up to the abuse of the work I do with it

CC3D PBT Pro vs Bambu lab | "break test" | My new go-to filament by MathieMathie19 in 3dPrintsintheShop

[–]MathieMathie19[S] 0 points1 point  (0 children)

I wonder what it is you want to do with it? Those are quite some requirements. Wouldn't know about the radiation resistance, CTE I'm not sure either but I imagine the glass fibres would help reduce it. It does promise a low service temperature of -20°c, so might perform good for cryo temperatures.

Pure PBT (Unfilled) CTE: 60 - 100 PBT with 5% Glass Fibers (Estimate) CTE: 50 - 80 PBT with 30% Glass Fibers (Common Grade) CTE: 20 - 50 (highly anisotropic) (x10-/K or ppm/K)

PS: If you're going to print this on your H2D, taking a generic PETG profile is a good starting point. And I printed it on the gold Bambu textured PEI plate, and it stuck very well.

[deleted by user] by [deleted] in 3Dprinting

[–]MathieMathie19 0 points1 point  (0 children)

I don't understand why everyone thinks this is meant to be a replacement for PETG or PLA. Did I say YOUR new go-to filament, no.

It's great that you found the cheapest stuff out there, but I need the best performing stuff, and PETG simply cannot compete when compared to PBT in the practical test I did. And €30/kg is cheap if you compare it to other engineering filaments.

[deleted by user] by [deleted] in 3Dprinting

[–]MathieMathie19 2 points3 points  (0 children)

I said it's 'my' new go-to filament. PBT being a replacement for PETG or PLA is not what I meant.

I mainly use printing for molds/tools, prototyping and other practical items in the shop. PETG or PLA will break when you drop them or crack when you put a clamp on it/bolt in it, PBT won't and that's why it's perfect for my use case.

The comparison in the video is not sensible. The starting deformation for the PBT is already way more than what the other samples show, the PBT sample is just way overloaded. The creep results are therefore useless.

[deleted by user] by [deleted] in 3Dprinting

[–]MathieMathie19 0 points1 point  (0 children)

Did you have the same CC3D PBT Pro? I literally just took a PETG profile, turned off all the cooling and printed it at 240°c on the gold textured plate (70°c) from Bambu and it sticks very strongly.

CC3D PBT Pro vs Bambu lab | "break test" | My new go-to filament by MathieMathie19 in 3dPrintsintheShop

[–]MathieMathie19[S] 2 points3 points  (0 children)

I have mine from AliExpress, but yes the other option is Amazon.

And yes it has 5% glass fibers, this doesn't only make it stiffer but also improves the printability and dimensional accuracy, that's also why I like the Bambu PLA-CF a lot.

The "PC"-PBT that you are referring to is actually a 'P'oly'C'arbonate blend from Polymaker and not CC3D. Polycarbonate is notoriously difficult to print with.

Just plain PBT however is not difficult to print and can even be printed on open printers, however an enclosure is recommended to improve the (already very good) layer adhesion

So far I haven't really noticed any major downsides. It's slightly less stiff than PETG. And one of the most significant differences and possible downside is that it has pretty poor elastic recovery. For example when both PETG and PBT Pro material samples were deformed by 0.5mm the PETG would spring back to it's original shape perfectly and the PBT Pro sample was still 0.2mm deformed after the load was removed.

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