Greg Holloway

Administrator, Male, 44

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Greg Holloway was last seen:: Viewing thread René Jurack's Tool-changing Assembly-Guide Videos, Sep 23, 2020 at 9:48 AM

1. 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.
  
  Aug 13, 2020
  2. 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
  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.
  
  Aug 13, 2020
3. 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.
  
  Aug 12, 2020
  2. 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
  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?
  
  Jul 4, 2020
  2. 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
  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???
  
  Mar 14, 2020
  2. Greg Holloway
    ¯\_(ツ)_/¯
    
    Mar 14, 2020
  3. Greg Holloway
    Not sure.
    
    Mar 14, 2020
  4. 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
  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.
  
  Mar 6, 2020
  2. View previous comments...
  3. Greg Holloway
    Ahh ok, we will be listing those soon
    
    Mar 6, 2020
  4. Greg Holloway
    live now | https://e3d-online.com/catalog/product/view/id/9357/s/toolhead-stepper-motor/
    
    Mar 6, 2020
    
    David Kennedy likes this.
  5. David Kennedy
    Just placed my order. Thank you Sir.
    
    Mar 6, 2020
    
    Greg Holloway likes this.
7. 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
  
  Apr 3, 2019
  2. Greg Holloway
    Yup. Possibly something for future iterations.
    
    Apr 3, 2019
8. Jim Narey
  Dear Greg, I left a message for you on the general forum before I realised there was a way of contacting you direct.
  
  It's here: https://forum.e3d-online.com/threads/message-for-greg-holloway-re-microslice.3188/
  
  I was really sorry to see the Littlebox site had gone. It's a really nice kit and with a few years soldering practice under my belt I've really enjoyed working on it.
  
  Thanks, Jim.
  
  Jan 31, 2019
9. David Kennedy
  Hello Greg. Would you be interested in running some test on a graphite heater block? I machined an extra one.
  
  Jan 7, 2019
10. 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.
  
  May 9, 2018
  2. Greg Holloway
    Hi,
    
    in the firmware you want fan kickstart turned on.
    
    May 11, 2018
    
    gonzalo likes this.
11. 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.
  
  Mar 24, 2018
12. 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.
  
  Mar 24, 2018
  2. 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
  3. 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
  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!
  
  Mar 16, 2018
  2. View previous comments...
  3. 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.
  4. 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
  5. 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
  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!
  
  Nov 11, 2017
  2. 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
  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.
  
  Oct 8, 2017
  2. Greg Holloway
    Hey,
    Try this... http://reprap.org/wiki/RUMBA#USB_connection
    
    Oct 8, 2017
  3. gonzalo
    Tried every which way but I could not enter the board into DFU mode... :(
    
    Oct 9, 2017
  4. Greg Holloway
    try unplugging everything from the rumba, see if that helps.
    
    Oct 9, 2017
16. 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.
  
  Jul 8, 2016
  2. Greg Holloway
    Hi,
    
    What email address have you been using and what is your order number? Try using the contact us form on E3D's website in case you emails are being filtered as spam.
    
    https://e3d-online.com/index.php?route=information/contact
    
    Greg
    
    Jul 8, 2016
17. 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.
  
  Feb 20, 2016
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Oct 25, 1975 (Age: 44)

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