Greg Holloway
Last Activity:
Sep 25, 2020 at 6:34 PM
Joined:
Sep 4, 2015
Messages:
946
Likes Received:
615
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93
Gender:
Male
Birthday:
Oct 25, 1975 (Age: 44)

Greg Holloway

Administrator, Male, 44

Staff Member
Greg Holloway was last seen:
Sep 25, 2020 at 6:34 PM
    1. Peter_Oxford
      Peter_Oxford
      At the moment I am thinking of converting to IDEX rather than Toolchanger as I only need two extruders, however I may end up regretting that decision as 3 or 4 extruders would be nice.
      1. Greg Holloway
        Greg Holloway
        Please post a thread on the forum and tag me with an @. it is not very easy to track conversations using this feature.
        Aug 14, 2020
    2. Peter_Oxford
      Peter_Oxford
      Thanks for your reply re. the IDEX setup. I have been looking into Duet 3D. Do you know if the Duet 2 has enough stepper drivers for doing this or would I need to use an expansion board? They probably have some info about this on their website/forum.
    3. Peter_Oxford
      Peter_Oxford
      Hi Greg - I work at Oxford University in the Engineering Science Department. We have an old Leapfrog Creatr HS printer which is mechanically sound. I would like to convert it to IDEX using E3D Hemera direct drive heads. I like your design for the BigBox Direct drive IDEX. The Leapfrog is similar to BigBox.. I wondered if you could offer any advice on Electronics and Firmware that you used. Thanks.
      1. Greg Holloway
        Greg Holloway
        Hello,
        At the time I used Marlin firmware and the RUMBA electronics. However I would recommend the Duet 2 Electronics and RRF3 firmware.
        Aug 13, 2020
        Peter_Oxford likes this.
    4. Randy.C
      Randy.C
      Hi Greg, I am interested in a laser head for the toolchanger system. Is there anyone (maybe you?) I can contact to talk to about laser head wavelength, adjustable power, and other characteristics?
      1. Greg Holloway
        Greg Holloway
        Hi Randy, I would recommend you contact a company who specialises in lasers as it's not our field of expertise. I can point you towards odicforce.com if you are looking to use laser diodes.
        Jul 6, 2020
    5. Andy Cohen
      Andy Cohen
      Greg
      A question...
      TC Config... the offsets... Z axis offset per tool. These are all negative numbers. Is closer to zero moving the hotend closer to the bed or further???
      1. Greg Holloway
        Greg Holloway
        ¯\_(ツ)_/¯
        Mar 14, 2020
      2. Greg Holloway
        Greg Holloway
        Not sure.
        Mar 14, 2020
      3. Spoon Unit
        Spoon Unit
        I ended up putting this in my config.g as a reminder.

        ; to nudge the nozzle closer to the bed, add a small amount to Z
        Apr 13, 2020
    6. David Kennedy
      David Kennedy
      Hi Greg. Is it possible to purchase the tool changer stepper motor by itself or will I have to purchase the entire assembly? Thanks for all of your work on the Tool changer and motion system.
      1. View previous comments...
      2. Greg Holloway
        Greg Holloway
        Ahh ok, we will be listing those soon
        Mar 6, 2020
      3. Greg Holloway
      4. David Kennedy
        David Kennedy
        Just placed my order. Thank you Sir.
        Mar 6, 2020
        Greg Holloway likes this.
    7. W1EBR.Gene
      W1EBR.Gene
      Hi Greg, has your team though about supporting a simple electrical connection between the tool grabber and the tool that is picked up? I am thinking of a serial eeprom like the type on inkjet cartridges which would let the firmware identify the tool it just picked up
      1. Greg Holloway
        Greg Holloway
        Yup. Possibly something for future iterations.
        Apr 3, 2019
    8. Jim Narey
      Jim Narey
    9. David Kennedy
      David Kennedy
      Hello Greg. Would you be interested in running some test on a graphite heater block? I machined an extra one.
    10. gonzalo
      gonzalo
      Greg, I read somewhere, maybe startup scripts or .Hex file that you made the part cooling fan start and run to full speed and then stop to make sure that they would work afterwards... The problem I have is that some prints that I ask for a very low fan speed, it will not start at all. where and how, do I do that?
      Thank you.
      Gonzalo.
      1. Greg Holloway
        Greg Holloway
        Hi,

        in the firmware you want fan kickstart turned on.
        May 11, 2018
        gonzalo likes this.
    11. W1EBR.Gene
      W1EBR.Gene
      Hi Greg, the new motion system looks amazing, I hope that I will be able to afford it at some point!

      FWIW, there are so many plastics that have difficulty printing at high speed that improved precision at a given speed is what I care about.
    12. W1EBR.Gene
      W1EBR.Gene
      HI Greg, saw the new motion system, that looks amazing. If I can afford it when you decide on the price, I will get it.
      Have you thought about a flex cable driven extruder? I know that they have their own set of issues, but weight is not one of them.
      1. Winand
        Winand
        I would love an answer to this question, I am looking at moving to nimble extruders now and having at least one direct drive toolhead for flexibles would be nice.
        Just curious, what are the main drawbacks with the flex cable? I dont have experience with them yet.
        Mar 30, 2018
      2. Greg Holloway
        Greg Holloway
        I have thought about it for a bit but no time for the moment to design a tool.
        Mar 31, 2018
    13. W1EBR.Gene
      W1EBR.Gene
      Hi Greg, do you have any of the 75cm Rapberry Pi camera flex cables left? If yes, can I buy one from you?
      Gene
      ps - I am using the new klipper firmware which runs on the RPi3 and the Rumba (Rpi3 does math, Rumba does I/O) It works nicely!
      1. View previous comments...
      2. W1EBR.Gene
        W1EBR.Gene
        Currently, Klipper has simple bed tilt calibration which should work pretty well with your linear rail version, but it requires a probe to determine the bed height at several different points to calculate the slope and intercept for the x and y axis.
        Mar 16, 2018
        Greg Holloway likes this.
      3. W1EBR.Gene
        W1EBR.Gene
        The developer, Kevin O'Connor is very responsive to requests and willing to co-develop new features. If you have x,y,z coordinate data (vs using a probe to measure it) it shouldn't be too difficult to add the ability to work with it.
        Mar 16, 2018
      4. W1EBR.Gene
        W1EBR.Gene
        I am not going back to Marlin; the print results I have seen with TPU are much better than what I could get with Marlin running on Rumba with bed leveling using 4 stepper motors simultaneously.
        Mar 16, 2018
    14. gonzalo
      gonzalo
      Hello Greg,
      Quick question, I am still on RC6, is that ok? or should I move on to a new build? what are you on? thank you!
      1. Greg Holloway
        Greg Holloway
        if it still works it's ok. I am running the latest version on all of my machines. But the printfarm is still on RC6.
        Nov 13, 2017
    15. gonzalo
      gonzalo
      Hi Greg.
      I was flashing Rumba with XLoader as usual but it got stuck. I killed XLoader and tried again, but now all I get on BB is a blank blue screen.
      Re installed Arduino/rumba drivers but nothing uploads...
      Can you help?
      Thank you.
      1. Greg Holloway
      2. gonzalo
        gonzalo
        Tried every which way but I could not enter the board into DFU mode... :(
        Oct 9, 2017
      3. Greg Holloway
        Greg Holloway
        try unplugging everything from the rumba, see if that helps.
        Oct 9, 2017
    16. Parth
      Parth
      Hey, I orders 2 Titan extruders, but I am very confused as I haven't received any confirmation from E3D.And my order history is also empty. I checked with my bank twice and they said the transaction was successful. I have been trying to contact E3D via email since 2 day but no reply. At least some kind of communication would be appreciated.
      1. Greg Holloway
        Greg Holloway
        Jul 8, 2016
    17. TstarkEngineering
      TstarkEngineering
      Hey Greg, for us early pre-orders will the files be released prior to receiving the units :-). I would like to get a jump start on things.
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  • About

    Gender:
    Male
    Birthday:
    Oct 25, 1975 (Age: 44)
    Printer:
    BigBox, a whole building full of them!