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    engineering elf

    @engineering elf

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    Latest posts made by engineering elf

    • RE: Move the extruder without tool selected

      Just got a chance to try your suggestion and it works just fine, but I did have to put in a
      M564 H0 as U was not homed.

      Thanks for your help.

      posted in Duet Hardware and wiring
      engineering elf
      engineering elf
    • Move the extruder without tool selected

      Hi

      I have a home built tool changer along the lines of an e3d system but to save weight and allow for a heated chamber I am using a suction cup to couple the tools and a flexy drive to the tool with a single extruder motor serving all the tools. For this design the tools and the tool holder have a splined shaft connection and if it is not aligned properly the tool change can fail. My intention was to giggle the extruder motor backwards and forwards a few degrees as the coupling was made so the splines would engage. So far my tests show this will work.
      The problem I have hit is the software will not let the extruder motor move until it has finished running the
      _ Pre.g file and selected the tool.

      I can think it would be posable with a four pole change over relay to switch to another driver but I am not shore that is a safe way to go and may damage the driver chips, so it would be better to find a solution in the software somehow. I have tried calling a sub program in _Prep.g to bring the tool head forward a few milimeters as I giggle the extruder but I still have the same problem.

      Does anyone have any idlers of a way forward so I can move the extruber as I pick up the tool?

      Thanks

      posted in Duet Hardware and wiring
      engineering elf
      engineering elf
    • RE: End stops

      Hi

      Thanks for that information:

      It’s very interesting to know there is something like this available. I am thinking I will have a try with this Duet feature and see if i can make it work reliably before fitting any switches.

      posted in Duet Hardware and wiring
      engineering elf
      engineering elf
    • End stops

      Hi

      I am preparing a motion system I have made myself to be ready for E3d Tool changers when they become available and what to use duet electronics on this machine.

      My questions are :
      It seems E3d are using a stepper motor on the tool changer mechanism and it has no end stop switch but dose have a mechanical stop, so is there a way to drive it to the mechanical stop with reduced currant and then use that as a reference position?
      It also seems form there wiring instructions that there is no mention of end stop switches on the X and Y axis either, so is also posable to do this with the Nema 7 motors?

      Thanks

      posted in Duet Hardware and wiring
      engineering elf
      engineering elf