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scottmayson

New Extruder design - MB Mk6 Gear drive

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This is the drive gear you're talking about correct? :

http://store.makerbot.com/mk5-drive-gear.html

I seem to be a little lost on the bearings though. I'm not very familiar with how bearings are measured. Can you link an example 106x3 bearing that would work for this?

Additionally, would this be printable in pla or would it need to be in abs since it has direct contact with the motor?

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Tom, thats the one! re the bearings look at the web link above. basically they are ID6, OD10 & 3mm width. You can print it in either material. However, you need a heated bed to print ABS successfully.

 

This is the drive gear you're talking about correct? :

http://store.makerbot.com/mk5-drive-gear.html

I seem to be a little lost on the bearings though. I'm not very familiar with how bearings are measured. Can you link an example 106x3 bearing that would work for this?

Additionally, would this be printable in pla or would it need to be in abs since it has direct contact with the motor?

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Would there be any benefit from the MK7 gear drive over the MK6? they look pretty much the same besides the dimensions. I'm looking into building your design, so I figured I'd ask before i bought the pieces just in case there was some benefit you might know of.

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Hello,

Don't you think that for your design (or even for the original extruder design) placing a kind of circle flat rubber band around the extruder bolt could be a good idea ?

I think it could avoid the marks engraved in the filament while giving even more gripping if using appropriate pressure...

Any opinion ?

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It looks like Makerbot is dropping all their parts for people building/upgrading their own 3D printers. Everything but a complete Mk7 head and one other item is out of stock, and is findable only via Google.

So I'm hoping someone else starts making those drive pulleys. There was an IndieGoGo project that ended in June, he calls them "Hyena". Also sells a shaft threaded on both ends with the grooved drive area cut into it, looks made for Ultimaker. Haven't checked the sizes.

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