Another Predator

Carlo

Hi,

So I used the well 0.102 feeler gauge though it is .10 with my calipers and 3 times got 3 heights.
I did video the whole process but that won't help me
The numbers don't actually help because they are not accurate though one of them is:

M98 P"0:/macros/Z probe report"
Z probe trigger height set to -0.159 mm

I don't think it's the effector because it does what it is supposed to do and no matter what trigger height I put in G31 line its the same outcome and the effector does return the same probe heights all be it not one after the other
maybe the drivers are not calculating correctly I don't know but it is what it is and that is not usable.

Cheers for your help.

C

NexxCat

@Carlo
Ok, last thing I can think of, just to double check if the actual positioning is being repeatable. Run these commands one at a time, or save it as a macro:

; Disable any baby-stepping and the bed mesh
M290 R0 S0
G29 S2

; Home the effector
G28

; Heat bed to 60C & nozzle to 130C
M104 S130 T0
M190 S60 T0
M109 S130 T0

; Run delta calibration
G32

; Move the effector to 0,0,Max height
G1 X0 Y0 F4500
G1 Z500 F4500

; Move the effector back to 10mm off the bed
G1 Z10 F4500

; Slowly move down to 0.1mm
G1 Z0.1 F600

When the macro is finished, the nozzle is at 0.1 on the Z axis. Use the paper or a 0.1mm feeler gauge and see if the nozzle truly is at 0.1mm

Carlo

@droftarts

Hi Ian,

I used the original effector with the mag arms (printed the adapters) whats funny is I didn't even try to get anything level or square I literally slapped it together set the offset 1 level and it just worked.
I have the effector still wired I can carefully attach it to the Duet2 and try it i cant fit the effector to the other board it's locked down
but I've written this thing off now I don't expect this to ever work with duet but after spending all this time I do want to know whats wrong maybe it will help someone else some day...probably not

I post a video of it once its fitted

Thanks
C

Carlo

@NexxCat

I'll do that now.

Cheers
C

Carlo

@NexxCat

Hi NexxCat,

No its 0.1mm to high

NexxCat

@Carlo
What is your current Z probe offset?

Carlo

@NexxCat

G31 P100 X0 Y0 Z-0.159

NexxCat

@Carlo
I can't remember offhand which way to adjust the offset to bring it closer, but try both of these, one will certainly be too high, but the other, does that give you a 0.1mm gap when running the macro I posted?

G31 P100 X0 Y0 Z-0.059

G31 P100 X0 Y0 Z-0.259

Carlo

@NexxCat

They have all been tried

it's 0.05 to bring it closer dc42 suggested 0.05 so I've tried all the -0. possible infact the video I posted is -0.05

NexxCat

@Carlo
I know you've tried them whilst printing, but try -0.059 and run the macro. Is the gap 0.1mm?

Carlo

@NexxCat

Doing it now

Bang on

NexxCat

@Carlo
So with -0.059, the gap is exactly 0.1mm after running the macro I posted. Correct?

Carlo

@NexxCat

Yes spot on 0.1mm

NexxCat

@Carlo
Ok, set that in your config. Then create the bed mesh with G29 S0. Once the mesh is complete, try to print the levelling model.

I know you've done this so many times before, but let's try now we know the nozzle positioning is correct ok? Use the level_test.gcode I have you before, because I know it doesn't have anything in it to mess with the settings.

Carlo

@NexxCat

Will do that now

Thanks
C

Carlo

@NexxCat

It failed but it's too close to the bed just I think but its the best its ever looked.

NexxCat

@Carlo
So it was sticking but not extruding because it was too close? Try changing the offset to say -0.1?

Carlo

@NexxCat

Sorry been having net issues i'll adjust it 0.01 increments see if it works better.
It was extruding and really sticking but as it did the next pass it was squishing too hard almost transparent and curling up at the outer edges indented in the middle as it cooled

Thanks
C

Carlo

@NexxCat

Hi NexxCat,

Can I ask is Z hop enabled in the bed level test file you kindly sliced for me ?
Or is that controlled via config.g ? ...so print files call M207: Retraction if Z hop is set on M207 in config.g Z hop is invoked on all Retractions ?

Thanks
C

droftarts

@Carlo said in Another Predator:

It was extruding and really sticking but as it did the next pass it was squishing too hard almost transparent and curling up at the outer edges indented in the middle as it cooled

This makes it sound like the first layer printed fine, but when printing the second layer it was too close, ie it didn't move correctly/far enough in Z. This made me think either you Z jerk or acceleration is too high, or your steps per mm are wrong (which would explain a lot!). I haven’t found the standard Marlin config for the Anycubic Predator, but did find https://github.com/halofx/Marlin-2.0-Predator/blob/master/Marlin/Configuration.h

Steps per mm on each axis are 80, for standard 1.8 degree motors. You haven’t changed yours for 0.9 degree, have you?

I haven’t been through the Marlin config for acceleration and jerk settings, as on phone with tiny screen! But would be worth checking. Just remember Marlin specifies speeds in mm/sec, RRF in mm/min. If you have the Marlin configuration.h you’re running on your standard board, even better; please post it.

Ian