Something about About low temperature repair

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Something about About low temperature repair

Post by Admin » Mon Dec 02, 2019 1:27 pm

Hi, guys.
something about the low-temperature repair.
you can refer to this link;
A20T_G05_V1.1.8_2.rar
(121.52 KiB) Downloaded 48 times

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vert
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Re: Something about About low temperature repair

Post by vert » Mon Dec 02, 2019 1:55 pm

to comply with the GPL you need the source for these hex files posted some where.

ericarenee
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Re: Something about About low temperature repair

Post by ericarenee » Sat Dec 07, 2019 7:17 am

How do we use this to update the printer.

I seem to not be able to get it to work .

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Re: Something about About low temperature repair

Post by vert » Sat Dec 07, 2019 9:54 am

.hex files can be flashed to a printer a number of ways i usually do it with octoprint plugin that uses avrdude but cura can also be used.
when attaching a 3dprinter to a windows system you will need drivers that are not required on unix based systems.

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Re: Something about About low temperature repair

Post by ericarenee » Mon Dec 09, 2019 12:42 am

Has anyone actually flashed firmware on the a20t printer.

It seems everyone is posting Common procedure for flashing firmware on geeetech devices. It shows match baud rate and 112 as the rate. but the geetech a20t inside its about on the printer itself it says 250000 ... I really do believe this is the issue..

Can someone Who actually owns this exact printer that has flashed this post and give there exact procedure how it worked. NOT Those who own other geeetech printers.

I have been working on this for over a week and about to send it back as its useless to me only able to print 1 color unless you stand next to it as changing the g-code to never turn the hot end heating off is not a real solution.
I have other 3d printers and never had a issue updating firmware on them.

Thank you in advance for any a20t printer owners..

Erica .

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Re: Something about About low temperature repair

Post by vert » Mon Dec 09, 2019 6:02 am

my requests for source code have been ignored several times for the user to make any mods to there machine or correct any issues the source is required.

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Re: Something about About low temperature repair

Post by William » Mon Dec 09, 2019 9:43 am

ericarenee wrote:
Mon Dec 09, 2019 12:42 am
Has anyone actually flashed firmware on the a20t printer.

It seems everyone is posting Common procedure for flashing firmware on geeetech devices. It shows match baud rate and 112 as the rate. but the geetech a20t inside its about on the printer itself it says 250000 ... I really do believe this is the issue..

Can someone Who actually owns this exact printer that has flashed this post and give there exact procedure how it worked. NOT Those who own other geeetech printers.

I have been working on this for over a week and about to send it back as its useless to me only able to print 1 color unless you stand next to it as changing the g-code to never turn the hot end heating off is not a real solution.
I have other 3d printers and never had a issue updating firmware on them.

Thank you in advance for any a20t printer owners..

Erica .
Hi, If you are unable to update the firmware, you can contact your sales representative to replace the motherboard.
-Keep your mind and try to test it. :)
-Everything will be fun!-Support all Getech printer.
-You can ask me the questions and I will kindly reply.
-Respect others is the best way you can get help!

ericarenee
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Re: Something about About low temperature repair

Post by ericarenee » Tue Dec 10, 2019 4:09 am

Thank you .

I actually was able to get it to update using a very old Core 2 Duo Computer. Its odd that apparently it did not like None of our high end Thinkpad Laptops. none of the 3 of them would work.

BAD NEWS.

The flash did not solve the issue . I am starting to lean toward its not a firmware issue but a issue with slicer programs not compatible with 3 extruders.
Adding the Post process scrip Find and replace M104 REPLACE WITH ; WORKS..

But would like a real fix not a patch as The printer hot end does not cool at the end of the print.. I am afraid if something goes wrong it will clog print head, Over heat ptfe tube or worse..


Thanks everyone for trying to look into this. I am Sure that as more people start using this machine a fix will be found...

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Re: Something about About low temperature repair

Post by vert » Tue Dec 10, 2019 9:06 am

no slicer i know of is officially compatible with mixing extruder at all.
not to say there are not a bunch of workaround that can be used in all of them to get it working.
the years old firmware geeetech insists on using does not help matters as support was dropped for all marlin versions older then 2.0 last year.
short of building my own custom firmware on the latest marlin i was never able to get the stock firmware to function.

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Re: Something about About low temperature repair

Post by celer » Mon Dec 16, 2019 5:11 am

ericarenee wrote:
Tue Dec 10, 2019 4:09 am
Thank you .

I actually was able to get it to update using a very old Core 2 Duo Computer. Its odd that apparently it did not like None of our high end Thinkpad Laptops. none of the 3 of them would work.

BAD NEWS.

The flash did not solve the issue . I am starting to lean toward its not a firmware issue but a issue with slicer programs not compatible with 3 extruders.
Adding the Post process scrip Find and replace M104 REPLACE WITH ; WORKS..

But would like a real fix not a patch as The printer hot end does not cool at the end of the print.. I am afraid if something goes wrong it will clog print head, Over heat ptfe tube or worse..


Thanks everyone for trying to look into this. I am Sure that as more people start using this machine a fix will be found...
I guess the question I'd ask is does it print the test prints on the included SD card OK - If so it may be a slicer issue? I have one of these printer as well and outside of stringing and blobs haven't had any issues with getting it to print, even while mixing on all 3 extruders (I'm using Simplify3D).

To me it sounds like the "Temperature too low error" is likely a voltage issue with the power supply or motherboard. I'd test this theory by doing prints which incrementally add in more of the extruders, i.e. print with E0, then add in E1, then add in E2, and then swap the order of the extruders and how they are added in, if the issue occurs when there is more load on the printer then to me that would indicate it's a stability issue with the motherboard or power supply.

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