Jump to content
UltiMaker Community of 3D Printing Experts

Are MK7 or MK8 drive gears a direct replacement?


Recommended Posts

Posted · Are MK7 or MK8 drive gears a direct replacement?

They are a sort of Replacement.

This is for the MK8.

You will need to alter the Feeder Case to be usable with the filament path changed by 0.5mm, due to the new effective Diameter of 7mm. Also due to that you will need to change the new filament diameter to 2.68 to work with the new effective diameter aswell as set Retraction Speed and length bigger. Everything in a Ratio of 1.14:1

but for that "hard" work you will get a drive gear that cuts in the Fiolament so well that you can use 1.6A on the feeder motor without problems. Except that the drive gear may Start to slip on the rod because of the power.... but that is another topic :D

The biggest difference is that you have now a Set height where you have to put that drive gear.

I think i put the needed Parts for an MK8 Replacement in my Version of the feeder. Link in the Siq

Have fun

 

  • Link to post
    Share on other sites

    Posted · Are MK7 or MK8 drive gears a direct replacement?

    "You will need to alter the Feeder Case to be usable with the filament path changed by 0.5mm, due to the new effective Diameter of 7mm. Also due to that you will need to change the new filament diameter to 2.68 to work with the new effective diameter aswell as set Retraction Speed and length bigger. Everything in a Ratio of 1.14:1"

    I'm new to printing what do you mean ratio changes 1.14:1 for retraction speed and length

  • Link to post
    Share on other sites

    Posted · Are MK7 or MK8 drive gears a direct replacement?

    Since i always easily want to use the newest firmware version without much editing i did not change the E-Steps. Also i want to be able to do the extrusion tests.

     

  • Link to post
    Share on other sites

    Posted · Are MK7 or MK8 drive gears a direct replacement?

    OK, I see -- you're using the filament diameter to compensate for the difference in diameter. I guess you could also do that with the flow rate. Did you calculate your ratio based on the fact that filament diameter changes the extrusion volume by the square, not linearly like the extruder diameter?

    I use filament from a bunch of different mfgs, so I adjust my filament diameter for each spool (I've got spools ranging from 2.7 to 3.0 nominal). You'd have to recalculate your ratio every time you use a filament of a different diameter.

    Changing the steps/mm is a hassle, but it only needs to be done once -- and it can be done in gcode with M92 E____ , and saved to the machine's EEPROM. It does not require you to edit the firmware. Use M501 to load settings, M500 to save settings, M502 to reset to firmware defaults, and M503 will print the settings to the serial port / log window. (note that in Marlin, M502 does not save the loaded default settings -- you need to do an M500 as well if you want those defaults loaded when you restart)

     

  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
     Share

    • Our picks

      • Here it is. The new UltiMaker S7
        The UltiMaker S7 is built on the success of the UltiMaker S5 and its design decisions were heavily based on feedback from customers.
         
         
        So what’s new?
        The obvious change is the S7’s height. It now includes an integrated Air Manager. This filters the exhaust air of every print and also improves build temperature stability. To further enclose the build chamber the S7 only has one magnetically latched door.
         
        The build stack has also been completely redesigned. A PEI-coated flexible steel build plate makes a big difference to productivity. Not only do you not need tools to pop a printed part off. But we also don’t recommend using or adhesion structures for UltiMaker materials (except PC, because...it’s PC). Along with that, 4 pins and 25 magnets make it easy to replace the flex plate perfectly – even with one hand.
         
        The re-engineered print head has an inductive sensor which reduces noise when probing the build plate. This effectively makes it much harder to not achieve a perfect first layer, improving overall print success. We also reversed the front fan direction (fewer plastic hairs, less maintenance), made the print core door magnets stronger, and add a sensor that helps avoid flooding.
         

         
        The UltiMaker S7 also includes quality of life improvements:
        Reliable bed tilt compensation (no more thumbscrews) 2.4 and 5 GHz Wi-Fi A 1080p camera (mounted higher for a better view) Compatibility with 280+ Marketplace materials Compatibility with S5 project files (no reslicing needed) And a whole lot more  
        Curious to see the S7 in action?
        We’re hosting a free tech demo on February 7.
        It will be live and you can ask any questions to our CTO, Miguel Calvo.
        Register here for the Webinar
          • Like
        • 10 replies
      • UltiMaker Cura 5.3.0-Alpha 🎄 Tree Support Spotlight 🎄
        Are you a fan of tree support, but dislike the removal process and the amount of filament it uses? Then we would like to invite you to try this special release of UltiMaker Cura. Brought to you by our special community contributor @thomasrahm
         
        We generated a special version of Cura 5.2 called 5.3.0 Alpha + Xmas. The only changes we introduced compared to UltiMaker Cura 5.2.1 are those which are needed for the new supports. So keep in mind, this is not a sneak peek for Cura 5.3 (there are some really cool new features coming up) but a spotlight release highlighting this new version of tree supports.  
          • Like
        • 17 replies
      • New here? Get ahead with a free onboarding course
        Hi,
         
        Often getting started is the most difficult part of any process. A good start sets you up for success and saves you time and energy that could be spent elsewhere. That is why we have a onboarding course ready for
        Ultimaker S5 Pro Bundle, Ultimaker S5, Ultimaker S3 Ultimaker 2+ Connect.   
        They're ready for you on the Ultimaker Academy platform. All you need to do to gain access is to register your product to gain free access. 
        Ready? Register your product here in just 60 seconds.
          • Like
        • 14 replies
    ×
    ×
    • Create New...