Hardware wishlist

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  Stepper motor current
  • Ringo1508

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  @dc42 so awesome! Thank you! I understand now. My Duet 2 Wifi should be on it's way sometime soon. Cannot wait!
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  Thinking about using Duet for new build, but have questions
  • Ringo1508

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  @ringo1508 said in Thinking about using Duet for new build, but have questions: I also want to experiment with printing taller (in the case of RC planes, being able to print a larger portion with less work after the fact.) Delta printers are good for printing tall parts. But are you sure that you want tall parts, not longer parts? Think carefully about which way you want the layers to run, to get maximum strength in the directions where you need it.
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  Ethernet and WiFi capabilities combined on one board
  • jckray

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  @t3p3tony said in Ethernet and WiFi capabilities combined on one board: @TLAS @Danal the idea is to more the networking and UI onto the SBC so the Duet 3 wont have Networking built into the main board. I expect we will be providing either a SBC or a image to flash onto an SBC as part of the Duet 3 (or possibly both). One of the advantages of splitting them onto separate boards is that you are free to choose a more powerful SBC (with caveats on porting the SPI driver) that means users who want advanced functions like machine vision can have that. Of course this is more expensive than an ESP8266 so thats one of the reasons why the Duet 3 will be more expensive than the Duet 2, at least to start with. Optional Pre-Built board, optional image... sounds like the right way to go-to-market!
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  DC-fan control
  • Duckle

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  @dc42 This is, in fact, a Low-pass filter, a 2nd order one in fact (yeah not necessary) it's just buffered by an opamp, and the current is carried by a MOSFET A different option could be a low-pass with a series-pass transistor. that should be smaller than this board
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  Fans and stuff improvements…
  • DjDemonD

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  @noskillzengineer said in Fans and stuff improvements…: In my experience, 4 wire fans have physical switches, likely because of control on the fan itself, that is responsible for the speed control of the fan. I have never used a 4-wire fan with a physical switch. I have 2 of them in the PC that I am using, and some more on the bench that I have tested with various Duet-based controller electronics. PWM is PWM whether it is controlled by hardware alone (which would be very unusual these days) or by software. Why support 4? If your response means 4 pin headers like PC fan headers that will also run two and three fans/motors, then no issues here. There are two problems with controlling the a speed of 3-wire fans: Most of them were never designed to have PWM applied to the power feed to them. You won't find any PCs using PWM to control the power feed to a 3-wire fan. It's remarkable that so many 2- and 3-wire fans tolerate PWM at all. If you PWM the supply to a 3-wire fan then the output from the tacho wire is no longer reliable, because the tacho sensor depends on receiving continuous power. So the tacho reading would be wrong except at full speed. 4-wire fans are designed to work with PWM, so they are a much better choice if you want variable speed and RPM sensing. OTOH we could provide a 3-wire always-on (or just on/off) fan connector if users want that.
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  BLDC & Bipolar Stepper IC!!!
  • NoSkillzEngineer

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  @joergs5 ahh, I see what you are going for. All of the controllers I have used in the past with incremental encoders, non absolute, keep track of the position in the controller and increment/decrement the position based on the incoming signals from the encoder. I do like the idea of being able to read the position directly out of the encoder like you can due with the multiturn absolute as it makes doing simple verification of position with steppers easier. If encoder support is something that is implement in a future duet 3 expansion board hopefully it will support both incremental and absolute type encoders to offer the most flexibility
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  facing problem at the time of installing printer
  • john6655

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  @phaedrux Problems with printer driver? - it's probably a Canon PIXMA
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  Smart effector
  • Si3

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  The Smart Effector uses traces on the top and bottom the effector PCB as a strain gauge, to sense the slight flexing of the PCB when nozzle contact is made. We looked at doing a version for the Titan Aero, but the current mounting system of the Aero doesn't really lend itself to this approach. If you are looking for nozzle-contact bed probing on a Cartesian printer, you may wish to look at Precision Piezo. HTH David
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  Anycubic Linear Plus upgrade.
  • vapvap

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  @vapvap You mentioned "load the filament into the tube and start the print program" so I assumed that on your current machine you manually load the filament though the extruder and advanced it until it was coming out the nozzle. then start the print? Basically there are two separate processes going on. Setting up the printer so the filament is in the hotend, and ready to print starting a print sorting out 1) involves getting the filament through the extruder, down the bowden tube and into the (hot) hotend. You can do that by manually setting the hotend to the appropriate temperature, loading the filament into the extruder, and then using the printer controls to push the filament down the bowden tube. until it comes out the nozzle. Or you could to that through some automatic "load filament" mechanism. In our case we have the ability to automate that through a load filament macro.
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  VFD spindle drive 0-10V output
  • cnc65

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  thanks! you are right having this as an option for a future board is definitely worth looking at!
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  Smart carriage adapter IGUS 20x15 holes
  • Kerzal

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  Nice, these look good! I got the ones I ordered and they work great, but might go for the carbon ones if I need upgrades on my 2nd printer. Thanks for letting me know!
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  Request - support galvanometer control for SLA
  • TickTock

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  From the research I have done, it seems that 12bit DACs will not work, and you need to use 16bit DACs. Someone in the Marlin development has already started created code to drive Galvos: https://github.com/MarlinFirmware/Marlin/issues/6001 And from what I seen it is not to difficult to hook up the DACs to the Arduino, or atleast so it seems. And here is a discussion on SLA with some good info. http://forums.reprap.org/read.php?13,197775
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  CANopen, Ethernet, RS4985
  • Kulitorum

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  Any one of them, really, like EtherNet/IP (Ethernet Industrial Protocol), EtherCAT, Ethernet POWERLINK etc. https://en.wikipedia.org/wiki/List_of_automation_protocols
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  More channels
  • Kulitorum

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  @timcurtis67 I think the Replicape (soon to be Revolve) documentation is pretty decent actually, but this is coming from someone who can write any code that I want myself that is not included at the launch date. It's a pity that RRF is not on more boards. I think ESP WiFi is not reliable enough either based on what I've gathered not only in this forum, but other products that utilize the ESP WiFi modules. Ethernet is king https://replicape.github.io/gettingstarted/index.html
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  Driverless version
  • Kulitorum

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  Got it! btw we have 12 channels (two more on the CONN_LCD) header.
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  Standard PC PWM fan connectors
  • BikingViking

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  We keep it up because people like you keep buying Duets, which pays for us us to spend nearly all of our time working on making them better!
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  M-Codes compatibility mode for CNC
  • Catalin_RO

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  1. Yes there are people using RRF with no heaters. Why would a program for sending CNC GCode send M105? 2. You can configure the response of RRF to M0 by providing a stop.g file. If stop.g is provided, it doesn't turn the motors off.
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  VIN/GND Header for Remote Sense
  • tjb1

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  No one has replied

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  Large grounded lug
  • gzcwnk

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  How about using two flat CAT6 cables? One for low voltage stuff (temp sensor and Z probe) and one for heaters and fans? Mind the heater current doesn't exceed the cable rating.
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  Feature Request - Current monitoring
  • Markdnd

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  When you’re dealing with high currents “simple” is a bit of a relative term. Resistance has a nasty habit of changing as things heat up. Admittedly it goes up for cheap copper heaters so a cold measurement would suffice for a safety check. Having said that, insulation is a bit of a relative term when dealing with cheap imports. DC is, of course, right though - current measurement is definitely a nice to have and almost certainly not worth the additional cost.