Duet3D announces new tool board at FormNext

edsped

@Surgikill said in Duet3D announces new tool board at FormNext:

@edsped those actually look like they might work perfectly. A ton cheaper too.

No issues on my end so far but I have to admit I'm intrigued by the scanning probe but at more than twice the price for the board not sure if it would be worth it.

fcwilt

@Surgikill said in Duet3D announces new tool board at FormNext:

those actually look like they might work perfectly. A ton cheaper too.

But they are a funny shape. Who wants a printer with parts that have a funny shape. Give me a good old rectangle every time.

Frederick

Surgikill

@edsped Scanning probe would be good. I guess I could have one toolhead with a scanning probe and a euclid probe, and use either depending on the build surface, then do the rest with a fly-rrf-36.

@fcwilt Although, I do like that most of the connectors are along the bottom edge, and the stepper is along the top. Connectors along the sides have been a real pain for me designing slim toolheads so I can increase tool capacity.

A Former User

@fcwilt My Orbiter extruders have the same funny shape at the back thanks to their NEMA14 stepper so I am set. And it is amazing how you can hide the funny boards shape inside an enclosure so the one on the NEMA17 does not need a sheet thrown over it if companies is over.

edsped

I actually like the shape and as has already been said, having connectors on all 4 sides seems like it would add clutter. For me the RRF-36's are nice and compact. I'll likely grab the step file when it's released and see how it compares though.

fcwilt

@edsped

I was just making a funny remark about the shape.

I assume it is shaped that way to fit something else.

So what is that "something else"?

Thanks.

Frederick

jay_s_uk

@fcwilt the RRF-36 is shaped to mount on the rear of a nema 14

fcwilt

@jay_s_uk said in Duet3D announces new tool board at FormNext:

@fcwilt the RRF-36 is shaped to mount on the rear of a nema 14

There must be more to that. A NEMA 14 is square. The RRF-36 is not.

Frederick

jay_s_uk

@fcwilt round nema 14's aren't square... https://www.omc-stepperonline.com/round-nema-14-bipolar-0-9deg-8ncm-11-33oz-in-0-65a-36x20mm-4-wires-14hr08-0654s
they're now also the most popular type of motor to use on an extruder

fcwilt

@jay_s_uk

Well now it makes some sense.

Thanks.

Frederick

A Former User

@fcwilt Let me guess, back in math class you were the one to yell out Pie aint square, pie are round . Right?

fcwilt

@KenW

No, not that I recall.

It just seems to me that they made that shape to fit onto/into something else where that particular shape was well suited.

I doubt they picked that shape for artistic reasons.

Frederick

A Former User

@fcwilt Southern humor does not translate well I take it. The complete version of that one is.
Pie aint square. pie are round, cornbread are square.

droftarts

@fcwilt I don't know what the design parameters of the board, but you can guess from these pictures:
alt text
It doesn't fit behind the motor, it fits on the side, but it is the same width and height as the motor and extruder. This picture makes it look big, but that's a NEMA 14 round stepper, it really is tiny and light, even compared to a Hemera. Connections are forward and back, rather than up or down, and the mounting is very specific to the Roto extruder (it has the same spaced mounting holes on the other side of the extruder). Connectors are the standard ones E3D fit to their heaters, fans and thermistors, so they just plug straight in. Only the CAN connector exits from the top. There's a hot end fan on the other side, and I don't know where a part fan would fit on. It looks like the board could have been square, but for the top mounting hole. Probably the first Duet board with rounded corners - someone asked at Formnext why we didn't put rounded edges on our boards, and I pointed them towards @T3P3Tony!

Ian

jay_s_uk

@droftarts and the CAN connector is the same one that's been adopted by Mellow and BTT (XT30 2+2)

Surgikill

Well, looks like the roto is available for purchase through filastruder. Going to wait to purchase until the documentation is available.

Surgikill

Eh, I just found some basic documentation and max ambient printing temp is 40C. Think I'm going to have to pass on this extruder.

o_lampe

@Surgikill said in Duet3D announces new tool board at FormNext:

max ambient printing temp is 40C

Can you quote this or add a link for us?
I wonder if that's related to the 3d printed heatsink? Maybe it's thermal conductivity is too low.
Funny enough they dont conduct heat from the stepper, but added a thermal barrier between.

jay_s_uk

@o_lampe must be this bit he's quoting
https://beta.e3d-online.com/pages/help-centre-roto#:~:text=Performance Characteristics,temperature%3A 40°C

o_lampe

I've checked some papers and the conductivity of SLM printed aluminum-alloy is in the ballpark of conventional aluminum alloy material

Pure aluminium: 237 W/mK
SLM printed AlSi10Mg: 130-190 W/mK
Other Aluminium alloys vary from ~90-150 W/mK

So, if it's not the SLM-heatsink it must be poor design choices regarding airflow?