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repetier / Repetier-Firmware

Firmware for Arduino based RepRap 3D printer.
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Arduino Due + DRV8825 configuration #410

Open zeadope-zz opened 9 years ago

zeadope-zz commented 9 years ago

I was wondering if these settings are correct. So with step doubler 16000f / 320 steps/mm = 50 mm/s would be the printing speed. But what if I would like to print faster and have travel speed of 100 mm/s? Can the Due handle a faster step doubler frequency, since it uses a faster clk?

Settings below:

define XAXIS_STEPS_PER_MM 320

define YAXIS_STEPS_PER_MM 320

define STEPPER_HIGH_DELAY 0 // 2 Z3D 2015-06-24 14:56

define DIRECTION_DELAY 0

define STEP_DOUBLER_FREQUENCY 16000 // 12000 Z3D 2015-06-24 14:55

define ALLOW_QUADSTEPPING 1

define DOUBLE_STEP_DELAY 1 // time in microseconds

I would be very grateful if anyone can provide adequate insight about this.

repetier commented 9 years ago

Hi,

for due set double frequency to 90000 hz. Latest version 0.92.3 can handle 300000 and more in quadstepping mode.

Am 24.06.15 um 15:03 schrieb zeadope:

I was wondering if these settings are correct. So with step doubler 16000f / 320 steps/mm = 50 mm/s would be the printing speed. But what if I would like to print faster and have travel speed of 100 mm/s? Can the Due handle a faster step doubler frequency, since it uses a faster clk?

Settings below:

define XAXIS_STEPS_PER_MM 320

define YAXIS_STEPS_PER_MM 320

define STEPPER_HIGH_DELAY 0 // 2 Z3D 2015-06-24 14:56

define DIRECTION_DELAY 0

define STEP_DOUBLER_FREQUENCY 16000 // 12000 Z3D 2015-06-24 14:55

define ALLOW_QUADSTEPPING 1

define DOUBLE_STEP_DELAY 1 // time in microseconds

I would be very grateful if anyone can provide adequate insight about this.

— Reply to this email directly or view it on GitHub https://github.com/repetier/Repetier-Firmware/issues/410.

Mit freundlichen Grüßen/Yours

Roland Littwin

Hot-World GmbH & Co. KG Knickelsdorf 42 47877 Willich Deutschland

Tel.: 02154-606518 Fax: 02154-606519

Geschäftsführer: Marcus Littwin Handelsregister: Amtsgericht Krefeld HRA 5325 Umsatzsteuer-Identifikationsnummer: DE213748632 Persönlich haftender Gesellschafter: Hot-World Medien GmbH mit Sitz in Willich Handelsregister: Amtsgericht Krefeld HRB 10800

zeadope-zz commented 9 years ago

Hello repetier,

Thank you very much for your quick reply. I will test these settings shortly.

repetier commented 9 years ago

If you get lost steps it is because DRV8825 might be a bit slower then the due, so then set

define STEPPER_HIGH_DELAY 1

zeadope-zz commented 9 years ago

The 90000 setting caused I think do just about that. Trying delay 1.

repetier commented 9 years ago

No the 90000 does not change delays only allows higher frequencies. If you have a extra delay you might need to lower the limit to 70000 maybe as you are then taking more time in interrupt.

zeadope-zz commented 9 years ago

It works now Frequency doubler 90000 High delay 1

On custom prusa i3. I've changed to bowden. And also set jerk to 35. On 20 jerk I was getting blobs.