Jump to content
Cura Connect | Survey Read more... ×
Ultimaker Community of 3D Printing Experts
Sign in to follow this  
profepaco

Are MK7 or MK8 drive gears a direct replacement?

Recommended Posts

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

 

Share this post


Link to post
Share on other sites

"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

Share this post


Link to post
Share on other sites

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)

 

Share this post


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
Sign in to follow this  

  • Our picks

    • Architect Design Contest | People
      The goal of this contest is to design a set of people figurines that could be used in such a project to make an area, office or mall seem populated. 
      Think of different types of people in different environments, like walking people, people standing still, working people, and both men and women.
       
      • 9 replies
    • Taking Advantage of DfAM
      This is a statement that’s often made about AM/3DP. I'll focus on the way DfAM can take advantage of some of the unique capabilities that AM and 3DP have to offer. I personally think that the use of AM/3DP for light-weighting is one of it’s most exciting possibilities and one that could play a key part in the sustainability of design and manufacturing in the future.
        • Like
      • 3 replies
×

Important Information

Welcome to the Ultimaker Community of 3D printing experts. Visit the following links to read more about our Terms of Use or our Privacy Policy. Thank you!