Achieved calibration of 0.1 mm accuracy using Rich.s Marlin
Current Delta geometry values:
X (Endstop Adj): -1.575
Y (Endstop Adj): -1.175
Z (Endstop Adj): -2.987
A (Tower A Position Correction): 0.00
B (Tower B Position Correction): 0.00
C (Tower C Position Correction): 0.00
I (Tower A Radius Correction): -2.75
J (Tower B Radius Correction): -4.00
K (Tower C Radius Correction): -2.00
R (Delta Radius): 283.21
D (Diagonal Rod Length):448.95
H (Z-Height): 315.1
My initial parameters were:
X (Endstop Adj): 0
Y (Endstop Adj): 0
Z (Endstop Adj): 0
A (Tower A Position Correction): 0.00
B (Tower B Position Correction): 0.00
C (Tower C Position Correction): 0.00
I (Tower A Radius Correction): 0
J (Tower B Radius Correction): 0
K (Tower C Radius Correction): 0
R (Delta Radius): 275.159
D (Diagonal Rod Length):440.5
H (Z-Height): 318.5
Took 13 iterations to calibrate at 0.1 accuracy.
The Diagonal rod length and delta radius are very accurately measured but the firmware changes them while calibration.
Surprisingly, the XY dimensions are accurate at diagonal rod length of 448.95 mm and not at the measured value of 440.5 mm
So what could be the reason behind it ?
Also changing the IJK values to -0.75, -2, 0 (that is minus the lowest value) destroys the calibration completely.
And how shall i proceed further to achieve accuracy upto 0.05mm ?
Hi Vaibhav,
In order to make sure the right people, that are able to help you, read your post, please let us know what printer you are using so that I can set the appropriate tags and send out notifications so that the right printer owners come and help you out!
Thank you.
Best,
Benny
Its a custom made Delta 3D printer. Thanks.
