Scratchy noises during movement - primarily from diagonal back right to front left

[slim finch]

I recently bought a used 2.4 from someone who printed exclusively ASA on it for two years. The inside has a slightly tacky residue of VOCs on the frame and i'm concerned this guming something up.

It prints okay, i haven't tuned much yet, but i notice tht it has extremely loud scratchy noises during particular movements

see the video here:
https://streamable.com/qglqfq

It's loudest when it's moving from home to (0,0) in a straight diagonal, and quietest in the opposite diagonal, but all directions have some amount fo scratchiness

I disabled the motors and noticed it's not particularly easy to push the X carriage left/right, but having never owned a voron or CoreXY machine i didnt know if this was normal.

Do i need to disassemble this entire thing to figure out the issue?

[sharp herald]

Rails are dry

Use grease without any particles in it
No mos, no ptfe etc

[sharp herald]

Unfortunately u did not click on your flag in #rules so i can’t recommend a vendor

[slim finch]

i bought some mobilux ep 2 🙂

[sharp herald]

Then time to grease every rail
This https://docs.ldomotors.com/guides/rail_grease_guide shows very well how to do it

Doesnt matter at all if its LDO or not

[slim finch]

was just about to ask for a recommneded guide 🙂

thank's for taking a look, i will follow the greasing guide and see if it helps

[sharp herald]

Clicking on your flag is still something thats very smart to do.
Saves time for both of us

I know where u are from and u dont need to spend time telling us

[slim finch]

doing that now !

thanks again! merry christmas/hannukah/whatever u celebrate or dont; and happy holidays / new year!

[sharp herald]

Welcome. You too

[slim finch]

@sharp herald one more question: this guide shows how to do it when the rails are totally removed (like building it for the first time)

should i totally disassemble the gantry to do this? or is there a good way to do while its all assembled?

[sharp herald]

U have to disassemble

Remove only the parts that are screwed to the linear rail carriages

Then u can remove the rail, clean it and grease

You will also need a few of the rail guides here https://github.com/VoronDesign/Voron-2/tree/Voron2.4/STLs/Tools

4 of each is good

[slim finch]

got it, ok. no shortcuts 🙂

since im removing the rail would it be a good idea to like clean off the old gunk with alcohol or something?

[sharp herald]

This is to ensure the rails sits perfectly in the middle

[sharp herald]

Remove it from where?

[slim finch]

well i assume there is old grase and ASA VOC gunk on the rail from the previous 2k hours of printing ASA

[sharp herald]

Did u look at the guide yet? If not, do it.
This will answer your question

[slim finch]

oh yeahp

there it is

lesson is to RTFM :p

[sharp herald]

No worries

[slim finch]

ok so i'll print these rail guides then disassemble and clean, thanks again!

[sharp herald]

Let us know how it goes

If u attach a zip tie to both ends of the rail, the carriage wont fall off. Thats how i do it