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Prusa I3 pro w and Marlin Kimbra
Posted: Wed Oct 03, 2018 6:37 pm
by Lothar
Hi,
do you know if exist a Marlin Kimbra for Prusa I3 W with GT2560 REV A+ ?
Re: Prusa I3 pro w and Marlin Kimbra
Posted: Fri Nov 09, 2018 12:36 am
by Lothar
Someone can help me?
Re: Prusa I3 pro w and Marlin Kimbra
Posted: Fri Nov 09, 2018 12:07 pm
by eye
Current version of Marlin Kimbra is called MK4DUO, it supports all the hardware needed. I now have a partial configuration for Pro W done but it's not fully working yet, prompted by your request.
However while configuring, i found the safety approach of the firmware insufficient. WATCHDOG feature is broken and disabled, so if the electronics were to hang, it'll likely get stuck with heaters on and burning itself up. Furthermore thermal runaway is disabled by default. To put it lightly, i don't trust it.
Why do you want it anyway? Is there any particular feature or featureset that you need that isn't present in Marlin?
Re: Prusa I3 pro w and Marlin Kimbra
Posted: Fri Nov 09, 2018 4:19 pm
by Lothar
I red in some parts that the cinematic algoritmic is an improvment of the standard Marlin.
I my mind this could be improve also the printing quality....
It is for try to evaluate is better or not.
But your topic related Watchdog is more important than the printer quality.
This show also becouse I didn't find any help about configurations of my Printer
Re: Prusa I3 pro w and Marlin Kimbra
Posted: Tue Nov 13, 2018 8:55 pm
by eye
I poked the developer and we got Watchdog working. However while it was not working, i softbricked my board trying to get it to work. I have all the hardware here to recover from softbrick, but i suppose others may have a harder time.
As far as i can tell at cursory glance, the motion algorithm in MK4Duo is exactly the same as in Marlin 1.1.9/2.0. It is to be remarked that the development doesn't stand still and all firmware developers have access to each other's code, codebases are closely related as they all stem from Sprinter and licenses are compatible so straight up borrowing is possible, and the last movement overhaul using newest engineering insights has happened in Marlin just last winter/spring by contributor 'ejtagle'. I can see the same options in either and either seems to move the same with such options chosen, but my testing was so far very limited. So in case you had old information that MK does something different, it may no longer be quite valid.
However i still had issues with PID calibration and thermal runaway, things that i have working smoothly in mainline Marlin. It needs more tweaking.
There are still more issues that i ran into and no longer reported because i got fed up with it. Minor issues, easy to fix issues, but they kept adding up. No approximate reverse chronological order for SD-card, heating error disables heater but the rest keeps working when you print from SD, upon saving EEPROM the part cooling fan no longer works, all kinds of absurd stuff.
I attach my current work in progress status, should you want to check it out at your own risk. Please note that it has a lot of experimental movement features enabled, as opposed to default example configuration for Pro W that ships with Marlin that is much more conservative. A better matched configuration is necessary to draw apples to apples comparisons.
I am now working on Marlin 2.0 beta configuration for the printer that will match the movement options of this. After a couple days of testing and fixing, i can provide it, right now is an unfortunate moment where some LCD logic is somewhat broken, i tried to fix it myself and reported but i'm not sure yet my fix is quite right, i'll just wait for maintainer's move on this.
Re: Prusa I3 pro w and Marlin Kimbra
Posted: Wed Nov 14, 2018 12:20 am
by William
eye wrote: ↑Tue Nov 13, 2018 8:55 pm
I poked the developer and we got Watchdog working. However while it was not working, i softbricked my board trying to get it to work. I have all the hardware here to recover from softbrick, but i suppose others may have a harder time.
As far as i can tell at cursory glance, the motion algorithm in MK4Duo is exactly the same as in Marlin 1.1.9/2.0. It is to be remarked that the development doesn't stand still and all firmware developers have access to each other's code, codebases are closely related as they all stem from Sprinter and licenses are compatible so straight up borrowing is possible, and the last movement overhaul using newest engineering insights has happened in Marlin just last winter/spring by contributor 'ejtagle'. I can see the same options in either and either seems to move the same with such options chosen, but my testing was so far very limited. So in case you had old information that MK does something different, it may no longer be quite valid.
However i still had issues with PID calibration and thermal runaway, things that i have working smoothly in mainline Marlin. It needs more tweaking.
There are still more issues that i ran into and no longer reported because i got fed up with it. Minor issues, easy to fix issues, but they kept adding up. No approximate reverse chronological order for SD-card, heating error disables heater but the rest keeps working when you print from SD, upon saving EEPROM the part cooling fan no longer works, all kinds of absurd stuff.
I attach my current work in progress status, should you want to check it out at your own risk. Please note that it has a lot of experimental movement features enabled, as opposed to default example configuration for Pro W that ships with Marlin that is much more conservative. A better matched configuration is necessary to draw apples to apples comparisons.
I am now working on Marlin 2.0 beta configuration for the printer that will match the movement options of this. After a couple days of testing and fixing, i can provide it, right now is an unfortunate moment where some LCD logic is somewhat broken, i tried to fix it myself and reported but i'm not sure yet my fix is quite right, i'll just wait for maintainer's move on this.
That's aweasome!