Independently leveled Z axis Issue

fcwilt

Sorry but I cannot tell where they are from that picture - I may be looking right at them and just not seeing them.

So where are the left and right linear guides mounted?

Thanks.

Frederick

mrenz999

@fcwilt So the left one is in the middle of the bed on the X axis. The 2 on the right are at the corners of the bed frame. The bed frame sits on the attachment to the linear guide mounts

fcwilt

@mrenz999 said in Independently leveled Z axis Issue:

@fcwilt So the left one is in the middle of the bed on the X axis. The 2 on the right are at the corners of the bed frame. The bed frame sits on the attachment to the linear guide mounts

Sorry I was not clear - I meant the Y axis guides - the ones running front to back on each side.

Frederick

mrenz999

@fcwilt gotcha. The are underneath

3DPrintingWorld

@mrenz999 said in Independently leveled Z axis Issue:

@3DPrintingWorld In your bed.g do you have it do multiple probes per point ? If so how do you accomplish that ?

I created a macro that heats the bed, calls out the mesh, homes, does the mesh, saves the mesh, then turns the bed off. I started at 10:10, then S= was my max travel minus 10. Plus you have to add/subtract your probe to nozzle offset.

M140 S60
M557 X10:365 Y10:290 S300:270
G28
G29 S0
G29 S3
M140 S0

fcwilt

@mrenz999

Great.

Did you print out those "tools" designed to help align the frame pieces?

I didn't have such tools and after seeing my 4 point height map I realized that my left and right Y axis guides were not in the same plane meaning the frame pieces were not in the same plane.

I closely examined the left and right frame pieces where they joined the four vertical pieces at the top and found that they were at slightly different heights, with the left piece being low in the rear and right piece being high in the front.

We are talking fractions of a mm but it was enough to generate a "twisted" height map - though not as bad as yours.

Perhaps you are having the same problem.

Frederick

3DPrintingWorld

@mrenz999

Looks like one of your bearings is not attached?

![0_1615255538626_bearing.png](Uploading 100%)

mrenz999

@fcwilt Perhaps. I did print the tool but things move so I will recheck them.
Is there a way to add the a and s parameter to your bed.g when doing the leveling so it does multiple probes ?

fcwilt

@3DPrintingWorld said in Independently leveled Z axis Issue:

M140 S60
M557 X10:365 Y10:290 S300:270
G28
G29 S0
G29 S3
M140 S0

Why the G29 S3? The G29 S0 creates the height map and loads it.

Frederick

mrenz999

@3DPrintingWorld I pulled screws out of all of them and started a retighten. Trying to see if something came loose.

fcwilt

@mrenz999 said in Independently leveled Z axis Issue:

@fcwilt Perhaps. I did print the tool but things move so I will recheck them.
Is there a way to add the a and s parameter to your bed.g when doing the leveling so it does multiple probes ?

Yes but is there some reason you cannot modify the existing M558?

Frederick

3DPrintingWorld

@mrenz999 said in Independently leveled Z axis Issue:

@3DPrintingWorld I pulled screws out of all of them and started a retighten. Trying to see if something came loose.

Ok, that makes sense.

mrenz999

I can but does that affect the bed leveling as well ?

fcwilt

@mrenz999 said in Independently leveled Z axis Issue:

I can but does that affect the bed leveling as well ?

If affects the way the probe works where ever it is used.

Do you wish to have it behave in different ways in different places?

Frederick

mrenz999

@fcwilt Not necessarily. I just want it to do multiple probes when it checks bed leveling when I home the printer.

3DPrintingWorld

@fcwilt said in Independently leveled Z axis Issue:

Why the G29 S3? The G29 S0 creates the height map and loads it.

Sorry I should have deleted that, I was making edits to mine before I posted it.

fcwilt

@mrenz999 said in Independently leveled Z axis Issue:

@fcwilt Not necessarily. I just want it to do multiple probes when it checks bed leveling when I home the printer.

Well the intent of the A and S parameters is to increase the accuracy and repeatability of the probe.

So I have always set them and let them take affect whenever the probe is used.

Frederick

mrenz999

@fcwilt makes perfect sense. I will set that. Thank You

martin7404

here is my 4 point map

fcwilt

Well I've completely lost track of who was having problems with what.

@3DPrintingWorld was the OP.

Then @martin7404 joined the discussion.

Then @mrenz999 joined the discussion.

Have we solved anything for anyone yet?

@martin7404 your 4 point height map suggests your bed is quite level.

Frederick