Mesh grid don't work
-
Hi,
Late to the party - sorry about that.
There are number of incorrect statements that have been made here but let's leave those for now.
As mentioned you should work on getting the bed much more level before enabling mesh bed compensation.
You can create a 4 point mesh just to see the overall levelness of the bed.
I would suspect that your left and right rails are not in the same plane.
Frederick
-
@jay_s_uk said in Mesh grid don't work:
=== Move === DMs created 83, maxWait 0ms, bed compensation in use: none, comp offset 0.000
Its showing as being in use, which is a good start.
Actually it's saying bed compensation in use: none. meaning nothing was applied when that M122 was sent. If it said bed compensation in use: mesh, that would mean it's active.
-
@Phaedrux good point. don't know how I read that wrong
-
@matej1006 said in Mesh grid don't work:
G29 S1 P"heightmap.csv" ; Mesh bed
This line should also be in homeall.g. Please check that....
-
@DIY-O-Sphere said in Mesh grid don't work:
@matej1006 said in Mesh grid don't work:
G29 S1 P"heightmap.csv" ; Mesh bed
This line should also be in homeall.g. Please check that....
That is one approach.
But since mesh bed compensation is mostly a benefit to printing it is also appropriate to only load the height map at the start of a print - either with start.g or whatever feature the slicer provides to execute user code.
-
Hello with a little help from @jay_s_uk i manage to het next results it's better but i still have minor problems
this is with bed in room temperature:
and with heat bed to 60 degree:
i have 4mm aluminium X gantry with linear guide see photo:
is this just to thick or what you think? -
@matej1006 Too thick, or not thick enough? Since the curve seems to go along the x axis it could be droop on the rail.
Assuming the screen shot with the linear rail is the X axis?
-
@Phaedrux that was my assumption as well
-
@matej1006 I agree with the others that your x-gantry is probably sagging down a bit which is causing the raised area in the middle of the bed, could also be your build plate has a slight curve to it (less likely).
One school of thought would be to try and stiffen up your gantry so it deflects less, but if you're getting decent print quality with the mesh compensation on, then I'd be tempted just to leave it. I'll admit my printer has a much worse looking buge in the heightmap that yours and I still get good, consistent first layers all over.
Comparing the cold and hot heightmaps you have posted, this might be expected - as things heat up, they flex. However, it could also be that the bed wasn't fully levelled the same (either manually or with auto-tramming) before creating either heightmap. On my corexy I always run the auto-tramming (via G32/bed.g) a few times until the deviations have converged before creating or loading a heightmap to ensure it is always levelled the same.
-
@Phaedrux i will draw new one more solud ans try again
