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JRDM

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  1. OK, thanks. It seems like it was out of stock in your shop for at least a couple months. I still have the original glass, I just want spares, and extras for hot swaps & additional surface treatments.
  2. I have had a Duet Maestro running on my UM2 for a few weeks now, though only used it on and off. I'm still looking for a less-clumsy way of fine tuning the Z offset for nozzle or bed plate swaps but otherwise, it works pretty nicely. The motor noise is pretty much gone. If you want to use PT100 sensors, you do need the board. I have dual extrusion with PT100 on each nozzle, but my upgraded bed & enclosure heater use thermistors. I haven't traced through whether the little front OLED screen is compatible. I don't have any illusion of making the front panel work as nicely as it did on Tinkergnome, I'd at least like it to display some status info instead of being an empty black recess. I'm still trying to make macros that bring back some of the slick functionality UM firmware and Tinkergnome had in the AVR firmwares, but that will come in time.
  3. I want a couple spare glass plates for my UM2 Go, official sources seem to be dried up already. I'd like to keep using the stock clips unless there's a better alternative. The stock clips need 4mm glass to work right, and 4mm thick glass is a little hard to come by. Thanks.
  4. TL Smoothers were made for TI drivers. They have a voltage and current sense timing profile that makes the motor run rougher than it should. TL Smoother does help slightly with the Allegro 49xx drivers too, but it wasn’t intentional. Ultimaker main boards for UM2 & UM2+ use the Allegro drivers. It’s worth noting that these mainboards use a less than optimal decay mode setting, which do show as a slight moiré on some curves. Allegro’s decay mode moiré is not nearly as bad as the ‘salmon skin’ TI drivers would show though.
  5. I like to do it on every nozzle change or when I swap bed plates, either can alter the Z offset. I might do one or the other maybe once a week. I consider writing down the number and editing a file to be to be a step back in quality of user interaction compared to turning a dial and clicking.
  6. Yeah don't get me wrong, I love RRF but figuring out how to set it up a certain way can be a chore. I think maybe I've figured out how to set it up it from the Duet Web Control. Maestro does offer the ability to use RRF style 12864 LCDs, I really haven't dug into what that offers. I'm not sure if the UM2 front panel is even compatible, I haven't dug into whether a compatible chip is being used there.
  7. It still sound a lot more involved and clumsier than the simple "Adjust Z Height" routine in the Tinkergnome menu where I can just turn the dial until the nozzle touches the middle of the plate and clicking saves the zero offset. Is there something I'm missing that can allow similar functionality in Duet? Same with the level adjustment routine. I want to get away from Marlin, Tinker Marlin etc but I'm not seeing a way forward on these particular issues.
  8. Does that mean you need to check and adjust the Z value in config.g whenever you change nozzles, for example?
  9. I have a Maestro to spare, it is still waiting for a machine to be put into. It's also less expensive. Unless you want WiFi connectivity, I don't think the full Duet2 board can do anything more for a UM2 than the Maestro could. I think Maestro might be a little quieter too, because it uses a newer generation of driver. Yes, that first machine I linked is called a Railcore. I don't own one, I'm acquainted with the two guys that designed it. It looks like a pretty good design but I don't think I can describe it any better than the site can.
  10. Railcore II ( https://www.kraegar.com/railcoreii) or E3D Toolchanger ( https://e3d-online.com/blog/2018/08/20/e3d-tool-changer-and-motion-system-beta-30-incoming/ ). Both machines demonstrate the power of the Duet controller platform. I've been meaning to convert one of my UM2s to Duet Maestro.
  11. I'm thinking of changing the controller board for a different type and I was thinking about making a little board to keep the original connectors, switch to reuse your existing power supply and pass through the signal & power to the new controller. I've mocked up the idea in a 2D CAD. I didn't find anything that does this yet. Is there something available that already does this or should I just design my own?
  12. I don't have a UM3 but I assume that would be in the 8 bit controller board (as opposed to the second board, a 32 bit one, that's also on the UM3), so reflashing it with a higher temperature setting might be possible. It's possible UM3 is more different than I realize though.
  13. I believe this is correct. It would be simpler to just use a PT100 sensor. You should be able to use the one that came with the UM unless you damaged it. The Ultimainboard's thermal sensor input is special amplifier circuitry designed just for PT100 type sensors.
  14. Ultem needs a higher bed temp than that, but PEEK is fine at 140˚C bed temp. Oddly, Ultem doesn't need as high of a nozzle temperature as PEEK. I've printed both below 350˚C, as low as 330˚C, but that was mostly smaller sections, suggesting slower speeds will work until you unlock the temperature limiter.
  15. Why are you wiring the fans in series? I don't think you're at risk of blowing out the fan control FET, assuming that's what you're worried about. I can look up the part but I believe it's a 1.5A FET and you're probably only using 0.4A to 0.5A of that at full blast with four 30mm fans. Anyway, the slope of the cooling air is pretty shallow and that still makes the cooling area pretty broad. And you might be surprised how much it helps to cool the plastic just as it comes out the nozzle.
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