Notifications
Clear all

fine tuning - wrinkled surface against the light  

  RSS
wakareva
(@wakareva)
Active Member
fine tuning - wrinkled surface against the light

Hi!

I'm trying to get the best possible result. I attach the photo with grazing light. In addition to a bit of gosting on each axis which I believe is due to the vibrations that I have to fix, there are also very visible roughnesses on the whole surface, how can I fix them? what are they caused by? Thanks for the tips.

Posted : 25/09/2021 8:00 pm
Diem
 Diem
(@diem)
Noble Member

It looks like your X and or Y axes are not moving smoothly.

For each axis:

First, with the power off, move the axis by hand; is is smooth? Does the resistance stay the same over the whole range?

Clean and lubricate the smooth rods, check they are not damaged/scratched. Check the idler pulley is not clogged, out of line, or damaged (loosen the belt and try turning it with your fingertip, is it smooth?)

With the belt loose try turning the stepper motor by hand; is is smooth?

Retighten the belt until it just begins to make a low musical note when plucked...

Make your next print this:

https://www.prusaprinters.org/prints/46639-tension-meter-for-the-gt2-belts-of-i3-mk3s-or-prus

It MUST be printed in Prusament PETG or the spring tension will be wrong.

Cheerio,

Posted : 26/09/2021 12:04 am
wakareva
(@wakareva)
Active Member
Topic starter answered:
Done

Hi!

Thanks, I did all this steps before write the post.

The rail move but probably not very smoothly. I'm not sure how much smooth they need to be? Can you share a video of your rail moving them by hands? Or where can I see to compare?

Thanks.

Posted : 26/09/2021 12:28 pm
Dan Rogers
(@dan-rogers)
Noble Member
butter smooth

butter smooth.  If they are not butter smooth, "lucy, you got some 'splainin to do"

 

Posted : 27/09/2021 3:58 am
Diem
 Diem
(@diem)
Noble Member

probably not very smoothly

This is probably the root of your problem.  The pressure needs to be even over the whole travel.

Check the belts, both ends, and make sure the linear bearings are not pinched by overtight mounts.

Cheerio,

Posted : 28/09/2021 12:45 pm
Share: