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Jeff DeMaagd
Works at DM Accessories LLC
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Jeff DeMaagd

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I recorded a video of a 120mm PETG bridge. On the 100mm video. I cut it off once the 1st bridge layer was done. https://www.reddit.com/r/3Dprinting/comments/528wig/petg_has_a_reputation_for_being_poor_with_bridges/
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Jeff DeMaagd

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PETG has a reputation for poor bridging. There's an element of truth to that, but it's also possible to reliably build good quality bridges in PETG. Last night, I decided to demonstrate it.

https://www.youtube.com/watch?v=mj2tYEPyqvM
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I'm doing something like 75% extrusion 60% speed. The tube is 1/8" aluminum tubing with a lot of tiny holes angled inward so there's gentle cooling just outside the nozzle. It's fed by an aquarium pump. I think the cooling could be a little bit stronger but when I slow it down like this it works OK. You just don't want turbulence blowing neighboring strands onto your fresh extrusion.

Jeff DeMaagd

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I'm getting the hang of some extreme overhangs. These fairing pods are about 70-75˚ in my best estimations.
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Jeff DeMaagd's profile photoIsaac Arciaga's profile photoEric Lien's profile photo
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I will try. But IRC feels like smoke signals or homing pidgins to me. I feel like I am stepping back in time. :)

Jeff DeMaagd

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The water system seems to do a good job of keeping the cold end cold in a heated build environment. Black is the coldest on the scale, showing the block and water lines as the colder than the surroundings, as I had hoped it would be.
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Jeff DeMaagd

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All hooked up and running.
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Jeff DeMaagd

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Last night, I built a 660mm tall rocket plane.
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No, you didn't.

Jeff DeMaagd

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I made a thing. 1.2m / 4ft wing span
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Thank you.

Jeff DeMaagd

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Trying a quick brain transplant.
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neat :)

Jeff DeMaagd

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Getting up to speed. The water block reads at least 10°C below ambient.
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Jeff DeMaagd

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Hoping to get this puppy going tonight.
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+Eric Lien thanks. I intended to show you this weekend, I just forgot to.

Jeff DeMaagd

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+Eric Lien A couple views of my newest 3D printing machine.
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The motion platform for X/Y is so clean. Very impressive.

Jeff DeMaagd

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I have one of the AliRubber silicone heated beds. I know the thermistor beta spec is 3950 and its resistance is supposed to be 100k at 25C. I set up the appropriate value in smoothieware config file and I'm getting readings of 130C at room temperature. The second thermistor also reads the same. Does anyone here have any idea what to try next?

The thermistors do respond with added heat (hand touching sensor area).
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A beta of about 3500 gets me readings that are pretty close to my thermocouple when at temp, at least in the 60-70C range. I won't try higher just yet.
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