What is the secret to tightening rails?
Have watched the video and nearly there but....
I have reduced the number of screws...
Tightened from left to right.... Right to left... then center outwards (which actually had the best result!)
Yet I still have a bow that I cannot remove.
This is on a vcore3.1 500.
Started with a range of 0.475 and is now at 0.281
Is there one last trick I can try or video that helps with Linear rails tightening?
25 Replies
Don't rotate the view. Post picture of the default viewangle and also include the numbers
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You could try to heat soak the machine for like 30-45mins and redo the Y rails when hot
Is the above mesh with or without PEI/magnetic sheet? Cold or warm
Without PEI, Without Magnet & Cold
Just suspect I am going to loose more when PEI sheet is on
Heat with most like then cause even more issues
This is a new bed as my previous had a wave problem and a bow. Now wave is mush better but bow is still there. So must be X and Y rails
Your x axis is bowing a little bit. That's easily fixed try to push a but on the x axis in the middle
Begin with that. Don't be afraid, if you push to much you can just pull it back up
You aim to get the front X0 - X500 as straight as possible
Hard to draw but the line should be as straight as possible.
I put shims on either ends of X gantry an have a very straight from end of the bed
But the back end of the bed for X look not so great. Somehow on the old bed I had the same issue comparing front and back of the bed for X
Really considering purchasing a thicker and better machined bed.... Put a engeneering square on this new bed with a light and seems to have a bow like my old bed
That's your numbers now?
Try to lower your back right corner a little bit
better than the old bed but not as expected
.27 is not bad
old bed is also straight on the front X (ignore Y as this is why I replaced this bed
I would try to lower the right back corner just a tiny bit and check again
but old bed also have the bow on the back of the bed for x
The bow in the back is usually because of a bowing gantry
But yours seems OK in front so I would start off by lowering the right back corner and see if it helps
Not possible to lower as I have the fully enclosed printer, can try raise front right again but due to panels, really difficult
Isn't there holes through the panels for this purpose?
yes, but when I try to raise I need to put way to much pressure to get it to move
Even when I losten all the horizontal screws, it does not move without force. Even tried lostening all the way to the back excluding the last screw so as to be able to pivot
0.27 is fine. I would put magnetic sheet on and heat it up and continue tweaking then. It will happen a lot when heated anyway
You could add kapton tape to the corners
Measurements for Corners:
Front Left : -0.019
Front Right : -0.019
Front Center : -0.027
Back Left : -0.124
Back Right : -0.142
Back Center : 0.17
So, back corners are close but back center is way off from the corners
Think this is then solution... Tape it....🤣
yeah do it!