Jump to content
Ultimaker Community of 3D Printing Experts
WiseOldOwl

UM2 Wobbly Out of Round Pulleys

Recommended Posts

So I just did the UM2+ extrusion kit upgrade to my UM2 & I noticed that the pulleys at the back (Y axis) are out of round. I knew about this since it was new, but knowing that every little bit helps - in regards to ringing and print quality, I'd like to get them running true.

--

The shafts are not bent according to my dial indicator...I *could* order new pulleys, but my concern is that they are going to be just as wonky/wobbly as the originals. Do you guys know where I can get high quality pulleys in the US that run true? (The shafts are also aligned properly and belts 'relieved' to equalize belt tension)

--

Can you tell me the specs for these? I think they are GT2, 2mm pitch, 20 teeth - right? It looks like SDPSI is out of them - thought about buying some pulley stock and turning & boring them (sneaking up on bore diameter for very close fit) on the lathe. Not sure if that is worth it or not. I'd have to add side plates to each pulley if I did that though & drill/tap grub screws. Thoughts?

--

I did a search before posting - I can only find info for upgrading UMO MXL to GT2...

Share this post


Link to post
Share on other sites

I don't own a um2 and I don't know how much would help to have perfect pulleys. My gt2 on my umo+ are quite ok (better than the woobly mxl has by default). For high precision stuff I always go to misumi, but I suppose there's other sources.

The specs of size are on the github https://github.com/Ultimaker/Ultimaker2?files=1 but indeed it doesn't say what gt2 is. But indeed is GT2 20teeth

Edited by Guest

Share this post


Link to post
Share on other sites

Thanks Neotko. I forgot about the GitHub repository.

I'm still wondering if I got replacement Ultimaker ones - since nobody has chimed in that 'mine are wobbly too' or if I should go the Misumi/SDPSI route. Buying from Misumi looks to be a bit of a hassle.

I have a bunch of mini parts to make using the .25 nozzle and every little bit helps at that scale.

Share this post


Link to post
Share on other sites

Hi, WiseOldOwl,

I'm sorry to hear the pulleys are off-round. Does the head feel like it moves smoothly?

Replacement parts are available for most of the UM2 components at fbrc8's webstore and ship anywhere in the US. fbrc8 is Ultimaker's North American assembly/support partner. It looks like we don't have the pulleys listed on the main webstore page right now, but I know we've got some in stock in the store if you want to email in at Sales@fbrc8.com.

 

 

Do you happen to have an UM reseller nearby that you could go and check in person their pulleys before buying?

 

No unfortunately I don't. I guess I'll have to tough it out and just buy a couple from different suppliers and spin them in the lathe to see which ones run true.

 

Edited by Guest

Share this post


Link to post
Share on other sites

Hi, WiseOldOwl,

I'm sorry to hear the pulleys are off-round. Does the head feel like it moves smoothly?

Replacement parts are available for most of the UM2 components at fbrc8's webstore and ship anywhere in the US. fbrc8 is Ultimaker's North American assembly/support partner. It looks like we don't have the pulleys listed on the main webstore page right now, but I know we've got some in stock in the store if you want to email in at Sales@fbrc8.com.

Thank you Erin. I didn't think to check there...I bought the machine new from Fbrc8 a few years ago.

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

  • Our picks

    • 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!