3 issues with my UMO+

[Kadows 0]

Hi,

I've had my UMO+ for almost a year and its barely been used since it got a bunch of problems.

Problem 1: Print quality

I get a lot of ugly lines in my prints. More in some and less in others but almost a bit in everything i print. The only things that print fine is really small things. 2x2cm. Anything bigger show these lines. I've tried changing the settings a bit but I cant find any setting that changes this.

I've also tried different PLA's. White, silver and black Ultimaker PLA, Colorfabb och some other PLA. Don't see much change there either.

I also tried to clean the printer and regularly lubricate with sewing machine oil.

Problem 2: Clicking noise

My x-axis have started to click a lot. I know other people have had this problem and its been the belts riding on the pulleys. I printed the alignment tool from Thingiverse and I have aligned my pulleys several times. It usually removes the sound for a while, but after an hour or so its back.

Problem 3: Rattling noise

My printer also makes a rattling noise that I don't think is normal. Its mainly the y-axis but a bit in the x-axis as well.

Does anyone have any ideas? The print quality is really bad and makes the printer not very useful. I really want it to work. :(

Thank you,

[neotko 1,417]

Problem 3. Probably some screw on the fan need's some 'screwing'.

Problem 2. The belts aint perfectly in alignment. https://ultimaker.com/en/community/20897-questions-after-umo-upgrade-to-gt2-belts-and-pulleys#reply-145972

Problem 1. Check that the heat of the hotend it's totally stable. If while prints it keeps constantly going up/down then you should run a PID adjustment to make it better.

Something like this (using printrun/pronterface free software to connect by USB to the printer) https://ultimaker.com/en/community/18625-solved-um2-pid-autotune-failed This it's for um2, but it's the same process for any ultimaker (and many many other printers).

[neotko 1,417]

For problem 2, since you already tested that, try to do that again, but also try to do the x/y calibration before fixing the pulleys. Sometimes it's a mix of both. I got tired on my ultimaker of that and the final fix was to move to a better GT2 pulley/belt, since the Ultimaker O+ pulleys (at least the ones I got on 2 machines) are pure caca with a lot of eccentricity.

[neotko 1,417]

Final note, sorry many post but fast writing!

I highly recommend you that you use the https://bultimaker.bulles.eu/experimental/

This unlocks the PID for the BED (removing the bangbang). This improves the layer-to-layer quality by A LOT.

[Kadows 0]

Final note, sorry many post but fast writing!

I highly recommend you that you use the https://bultimaker.bulles.eu/experimental/

This unlocks the PID for the BED (removing the bangbang). This improves the layer-to-layer quality by A LOT.

 

First, thank you for your replies. I will look into new firmware and pulleys.

Regarding the temperature. I havent tought about it before and while looking at my printer just now I do notice that it moves a fair bit between 209-211. Swinging between. Can this be the issue?

[neotko 1,417]

 

Final note, sorry many post but fast writing!

I highly recommend you that you use the https://bultimaker.bulles.eu/experimental/

This unlocks the PID for the BED (removing the bangbang). This improves the layer-to-layer quality by A LOT.

 

First, thank you for your replies. I will look into new firmware and pulleys.

Regarding the temperature. I havent tought about it before and while looking at my printer just now I do notice that it moves a fair bit between 209-211. Swinging between. Can this be the issue?

 

It might. I had some quality issues on the umo+ until fixed the pid. On 2 machines was always spot on but the third did need PID adjustment. Changing the temp changes (on some pla brands) the color/gloss/etc.

[Kadows 0]

 

 

Final note, sorry many post but fast writing!

I highly recommend you that you use the https://bultimaker.bulles.eu/experimental/

This unlocks the PID for the BED (removing the bangbang). This improves the layer-to-layer quality by A LOT.

 

First, thank you for your replies. I will look into new firmware and pulleys.

Regarding the temperature. I havent tought about it before and while looking at my printer just now I do notice that it moves a fair bit between 209-211. Swinging between. Can this be the issue?

 

It might. I had some quality issues on the umo+ until fixed the pid. On 2 machines was always spot on but the third did need PID adjustment. Changing the temp changes (on some pla brands) the color/gloss/etc.

 

Do you know of a guide how to do the PID adjustment?

[neotko 1,417]

https://ultimaker.com/en/community/4634-pid-autotune#reply-29067

Basically you connect to the printer and send the gcode so the autotune starts to work. It will do heat cicles and at the end will report a PID values to enter by gcode and then you store the new values on the eprom by M500.

Download the printrun/pronterface software (free) http://www.pronterface.com

[IRobertI 516]

For the ugly print issue. Have you tried printing a circle to see if it's a "perfect" circle or not? I'm thinking it could be a bit of backlash at play here.