manual bedlevel

boelle

i know i can fit a probe and do it automatic

but since i have a dial gauge (messuhr) are there a way it can be done manual by visiting x,y cords and note the height?

my center height is 0mm and the 4 corner screws are also 0, but there is a slight bend in it so i thought doing it once manual was the most cost effective way

could be bump map be used or are there other ways it could be done?

ZMan

I have a similar question.

How to enable manual calibration on four points? For manual adjustment with four screws?

boelle

hehe... i just turn the 4 screws so they are all the same height as center

the trouble is that my bed is not complete flat so i can use the dial gauge and note down difference in grid style (my bed is a mk42 with 5*4 squares printed on the bed so it shuld not take long to note down X,Y and how much Z differs from 0

ZMan

I would like that there was an item in the menu - Bed level. So that the printer moves through four points for calibration.

boelle

there is... kind of... disable steppers from the menu and moved the X and Y by hand and then adjust the screws

Repetier

@boelle: You need to configure a z probe and enable distortion correction. This can be a fake just to get distortion map running. Just do not start any autolevel commands then. G33 L0 lists correction points and values. You can set all values manually as well using
G33 X<pos> Y<pos> Z<correction>
and then enable distortion correction.

boelle

thanks :-D

time to work :-D

boelle

Q... i use https://www.repetier.com/firmware/v092/ to setup firmware

at bottom of first page i set my probe to be able to reach the whole bed as i will not be using a probe anyway

the Q is how to keep Z corrections during the whole print, do i just set DISTORTION_END_HEIGHT to 0 or do i set it to my max print height?

since i use a mk42 bed i will have to figure a number that when divided with 250 or 210 returns a whole number

could be nice if the grid could be a retangle instead of sqaure... :-/

Repetier

Please use dev version with G33, forgot to mention that 0.92 ha sit only working for deltas and not sure if you already can set it manually.

DISTORTION_END_HEIGHT 0 means correct distortion until z=0 so makes no sense. If you need it just for good bonding use 1-2mm and set DISTORTION_START_DEGRADE to 0.5. If it is the x-axis that bends run full correction for full height.

boelle

nope its just the bed that is not flat... and you are right... 1-2mm makes more sense

i figured the correction values by first zeroing the dial gauge in the center of the bed and then recorded the difference at each point in a grid style with 11 point on each axis

look like this: https://docs.google.com/spreadsheets/d/15z7_7LNgL0F1sFTm9LYgB-lkbt0tR3B2PlJdKHjRR0E/edit?usp=sharing<br/><br/>now i just have to enter the X and Y for each point so i can copy&paste to terminal

Repetier

I always send G33 L0
to get the list and copy the output. By design it has exactly the format to restore it, so you just copy your z values to coordinates and do the paste then.

boelle

So i have entered all the cord's and i can list them with G33 L0

but even thou i lower the nozzle to 1mm and move the nozzle from repetier host it does not seem to do anything

are there other commmands i need to run to make it work? anything i can do to check i did not miss anything?

Repetier

Since you can not run automatic measurement it does not get activated automatically, so you need

- M323 S0/S1 enable disable distortion correction P0 = not permanent, P1 = permanent = defaultto enable it. Then go with z below the 100% correction level or you will not see the change depending on how you configure dit to reduce to 0% correction.

boelle

ahh, will try that tomorrow

time to enjoy life outside the 3d world

boelle

worked, baby smooth 1st layer :-D

boelle

Q... i have made a clip on probe so that i can do automatic probing in 22*22 without spending days

will the distortion correction share the same data from eprom so that i can switch to distortion correction ?

bed leveling is nice but there is not much need for it once i'm 1-2mm from the bed

boelle

btw sorry if my question is stupid... and my printer is not a delta

Repetier

Not really sure what your questions is. Automatic distortion measuring with G33 will override your manual settings of course. If enabled it will always use the last stored correction.

Autoleveling is independent, but once you change autolevel the distortion correction makes no sense. In fact normally you do autolevel and then distortion measurement. Then you can autolevel again if bed is not rotated so same bumps at same position and distortion stays correct. But if you did initially only distortion and then autolevel it will get wrong. Order matters here.

boelle

My Q is if i can do an automatic disortion correction (using the probe) instead of automatic bed level

bed level is a bit overkill once i get 2mm above the bed :-D

Repetier

While you can the question is more if you should. If your be dis tilted 2mm you definitely should. If bed is more or less leveled and you just have bumps, then distortion only is a good solution to stop z moves on higher z levels.