Difficulties with motion calibration

[[email protected]]

Hello everyone.

After reading different topics in this forum, I decided to post my problem and see if anyone can help me. I am trying to finish the motion calibration in order to print the PEEK fan shroud. So far, I have followed the assembly manual (Assembly Guide for the Rostock MAX v2.0 3D printer) and everything worked just perfect, until I reached the motion calibration part (page 260 of the guide).

I set Z-height as explained so when I run the script (Tower Call), the nozzle is 0.2mm above the center of the plate. But the problem is that when the nozzle reaches tower X, Y, and Z, it actually touches the glass (let’s say its 0mm above the plate). I tried turning the end-stop screws clockwise (to the right) in each tower, so as to raise the nozzle but there is no change. I tried with 1/8th, 1/4th, 1/2th, even with one whole turn, but it seems to make no difference. Any idea why this could be happening? It’s like turning the end-stop screws have no effect on the height of the nozzle. Could it be that in the EEPROM, the fields Tower X, Y, and Z end-stop offset are set to 0? I also started playing with the Horizontal radius [mm], until I reached a point when Tower Y was with the same height as the center, but X and Z where still at the plate level.

I read that there is a way to actually adjust the height at each tower by modifying these values on the EEPROM. I also read that the X, Y, and Z max length field should all be the same, is that correct?

Any suggestion on how to proceed?

Here is the configuration of the EEPROM, in case you notice that some value is wrong:

Baudrate 250000
Filament Printed [m] 0
Printer active 0
Max. inactive time [ms,0=off] 1800000
Stop stepper after inactivity [ms,0=off] 0
Steps per mm 80
Max. feedrate [mm/s] 300
Homing feedrate [mm/s] 120
Max. jerk [mm/s] 35
X home pos [mm] 0
Y home pos [mm] 0
Z home pos [mm] 0
X max length [mm] 250
Y max length [mm] 250
Z max length [mm] 396.622
Acceleration [mm/s^2] 1850
Travel acceleration [mm/s^2] 3000
Diagonal rod length [mm] 269
Horizontal radius [mm] 132.25
Segments/s for travel 80
Segments/s for printing 225
Tower X endstop offset [steps] 0
Tower Y endstop offset [steps] 0
Tower Z endstop offset [steps] 0
Alpha A (210) 210
Alpha B (330) 330
Alpha C (90) 90
Delta Radius A(0) 0
Delta Radius B(0) 0
Delta Radius C(0) 0
Z-probe height 39.91
Z-probe speed 2
Z-probe x-y-speed 150
Z-probe offset x 0
Z-probe offset y 0
Z-probe X1 100
Z-probe Y1 20
Z-probe X2 160
Z-probe Y2 170
Z-probe X3 20
Z-probe Y3 170
Autolevel active (1/0) 0
Bed Heat Manager [0-3] 1
Bed PID drive max 255
Bed PID drive min 80
Bed PID P-gain 87.86
Bed PID I-gain 3.01
Bed PID D-gain 641.82
Bed PID max value [0-255] 255
Extr.1 steps per mm 92.4
Extr.1 max. feedrate [mm/s] 100
Extr.1 start feedrate [mm/s] 45
Extr.1 acceleration [mm/s^2] 6500
Extr.1 heat manager [0-3] 1
Extr.1 PID drive max 205
Extr.1 PID drive min 60
Extr.1 PID-gain/dead-time 8.8
Extr.1 PID I-gain 0.36
Extr.1 PID D-gain 53.86
Extr.1 PID max value 255
Extr. X-offset [steps] 0
Extr. Y-offset [steps] 0
Extr.1 temp stabilize time 3
Extr.1 temp. for retraction when heating [mm] 150
Extr.1 distance to retract when heating [mm] 0
Extr.1 extruder cooler speed [0-255] 255
Extr.1 advance L [0=off] 0

Thanks in advance.

[geneb]

I'd recommend going to the calibration process outlined in the Appendix. (last one I think)

Also, make sure your horizontal radius is set to 130 for the old-style carriages, 140 for the new style.

g.