Cura 4.x slower and not fitting time than 3.x o. Delta printer

[CorFlotsch 0]

Hello, I have the anycubic Kossel linear plus. With one run I update to cura 4.x and Marlin 1.1.9. problem is with all 4er Version of cura.

Since than my prints take 1,5 upto more than twice the time estimate in cura. I've already tried different settings in marlin and also couple of stuff with acceleration and jerks in both parts (cura and Marlin).

Does anybody had an idea if there may be some hidden setting that's lead to a mismatch with delta-printers?

 

*Baggging* for help

Martin

[marcottt 0]

hi, i have same printer and same issue.... time is totally wrong. last was 85 min predicted and more than 140 min real....

 

also there is not a profile and every time i need to rebuild because EVERY upgrade cura tell there is something wrong with profile...

[DivingDuck 105]

Look for plugin "Printer settings" by fieldOfView at Marketplace. It will give you access to your hidden printer settings in Cura. Compare the values with your firmware setup. Guess, this will give you an explanation why there are so huge differences.

 

Best way to get rid of this profile mess is building your own set of printer profiles (at least for me).

 

Be careful and change only values you know about for not damage the profiles.

[CorFlotsch 0]

hi there

i've found a solution. the problem is based in the Marlin firmware

 

look for the DEFAULT_AXIS_STEPS_PER_UNIT  lines in configuration.h

and modfie them as below (hard setting to 80/80/80/96 and not using the calcualtion from marlin 1.1.9

below is what i've done.

after that my timing for the try prints was good again, i will go on testing.

 

you can follow the discussion in

https://github.com/MarlinFirmware/Marlin/issues/15466

 

BR

Martin

 

/**
 * Default Axis Steps Per Unit (steps/mm)
 * Override with M92
 *                                      X, Y, Z, E0 [, E1[, E2[, E3[, E4]]]]
 */
#define DEFAULT_AXIS_STEPS_PER_UNIT   { 80, 80, 80, 98 } // DaHai: This is no longer used in Marlin 1.1.9 - it is now calculated below (But extruder steps must be defined)

/**
 * Default Axis Steps Per Unit (steps/mm)
 * Override with M92
 *                                      X, Y, Z, E0 [, E1[, E2[, E3[, E4]]]]
 */
// variables to calculate steps
#define XYZ_FULL_STEPS_PER_ROTATION 200 // DaHai: These are the setting for the stock Stepper Motors, pulleys and Belts on the AnyCubic Kossel
#define XYZ_MICROSTEPS 16
#define XYZ_BELT_PITCH 2
#define XYZ_PULLEY_TEETH 20

// delta speeds must be the same on xyz
//#define DEFAULT_XYZ_STEPS_PER_UNIT ((XYZ_FULL_STEPS_PER_ROTATION) * (XYZ_MICROSTEPS) / double(XYZ_BELT_PITCH) / double(XYZ_PULLEY_TEETH))
#define DEFAULT_XYZ_STEPS_PER_UNIT (80)
//#define DEFAULT_AXIS_STEPS_PER_UNIT   { DEFAULT_XYZ_STEPS_PER_UNIT, DEFAULT_XYZ_STEPS_PER_UNIT, DEFAULT_XYZ_STEPS_PER_UNIT, 98.0 }  // (extruder steps defined) default steps per unit for Kossel (GT2, 20 tooth)

 

[marcottt 0]

uhmmm...  i preferer to stay with actual settings becasue with others software i have not this issue. I think to use siggestion from @DivingDuck and try to put in "printer settings" addon same value of speed and jerk from my firmware... si if cura have same value i hope will calculate same time... 

 

[DivingDuck 105]

Since I did adjust this for my printers beginning this year I don't have huge discrepancies anymore. +-1% instead of +30% to 40% before what means minutes instead of hours for my printers.

[marcottt 0]

just made a print, after putting in the "printer settings" plugin same value for speed, acceleration and jerk from configuration.h and a 70 min print was 71 min... so this is another way to solve i think

[DivingDuck 105]

Glad to hear I could help.

[marcottt 0]

11 hours ago, DivingDuck said:

Glad to hear I could help.

 

very helpful, last print was predicted 4h33m and real  4h30m !!!

[fredkim 0]

Hello DivingDuck and Marcott,

 

I have also Anycubic Kossel Plus and i tried to follow the same steps checking the "control->motion" configuration from 3d printer controller and tried to put it in the ultimaker cura 4.5 but the print time is still slower then the actual print it self. I was getting about 47 mins prediction and 36 mins real time printing. Is there something that I am missing in the "printer settings" in the cura? thank you!

[DivingDuck 105]

Hello @fredkim,

unfortunately I don't own this printer. So it is difficultly to me to check your parameters. The only thing I can say is to take care using the same values as in your printer firmware.