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Changing feed speed when changing material?

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Posted · Changing feed speed when changing material?

I just got a new feeder, the Bondtech V2.

It is fantastic at ramming the filament through the hot-end, but there is one little problem. It cannot cope with the high speed feed rate when you choose "change material" it simply stalls as it can't keep up with the speed and resumes as soon as the speed is reduced.

Kind of irritating if you want to change material often.

So my question;

Is there an easy way to reduce this speed? Perhaps in the marlin code?

Cheers,

David

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Posted · Changing feed speed when changing material?

Hi David, interesting feeder, I take it you cannot adjust the friction tension of the hobbed gears for some softer or flexy materials?

back to your question, what exactly seems to be stalling and causing the problem?

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Posted (edited) · Changing feed speed when changing material?

Which version of the firmware are you using? There was one version a while back (can't remember which one at the moment) that caused that issue. I think it was the version that came out around the same time as the Extended and GO was launched.

You'll have to "hack" the firmware and I think this is what you'll need to change:

https://github.com/Ultimaker/Ultimaker2Marlin/blob/8a0382b7bc99d9f849cabf1b4aaa26adfb2e1b19/Marlin/UltiLCD2_menu_material.h#L23

It could also be caused because the firmware reduces the current to the stepper during this step.

Edited by Guest

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