New A20M Model ?

theju
Posts: 14
Joined: Mon Nov 04, 2019 6:03 pm

New A20M Model ?

Post by theju » Mon Nov 04, 2019 6:23 pm

Hi,
I've just buy a new A20M and found some difference between mine and the one show in webpages or in this forum.

Is this a new version or did I buy a clone / counterfeiting ?
  • My extruder Extension Board is not the same, I've free ports not documented and I burn my bltouch :-(
  • My printer is closed under, all photos I've seen have an open frame guivindirect acces to the controle board.
  • The more problematic : The X carriage have an ear, so the hotend doesn't go outside the bed anymore. I can't add a purge bucket for multicolor print.
20191104_074235.jpg
20191104_074235.jpg (179.3 KiB) Viewed 1405 times
Is there a spare part to change the carriage ?

Thanks
Ju

DzzD
Posts: 79
Joined: Sat Oct 19, 2019 5:52 pm

Re: New A20M Model ?

Post by DzzD » Mon Nov 04, 2019 6:53 pm

I recently bought an A20m too, and notice some differences from what I have read and see on it on internet/youtube :
- no superplate but a sticker bed
- unable to use purge bucket
- fan duct is also maybe smaller

For the purge bucket I simply cut the part that was disabling x carriage to go outside (see picture), you have to be carefull with the x stop, It has worked for me and I am able to use purge bucket now.
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20191104_114559.jpg
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vert
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Re: New A20M Model ?

Post by vert » Mon Nov 04, 2019 7:03 pm

there are dozens of variations of each geeetech printer in the wild they make changes over time.

theju
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Joined: Mon Nov 04, 2019 6:03 pm

Re: New A20M Model ?

Post by theju » Mon Nov 04, 2019 8:31 pm

vert wrote:
Mon Nov 04, 2019 7:03 pm
there are dozens of variations of each geeetech printer in the wild they make changes over time.
OK, but it is not reported to firmware configuration variant ?
For the example of the X "ear", firmware is always reported a -10 mm position at X endstop in official sources, mo mentions of this version in comments.

I'll try to cut 10 mm of the X part.

thanks !

DzzD
Posts: 79
Joined: Sat Oct 19, 2019 5:52 pm

Re: New A20M Model ?

Post by DzzD » Tue Nov 05, 2019 4:05 am

I'll try to cut 10 mm of the X part.
If you dont have have tools to do that, you can maybe simply order a new hotend cover https://fr.aliexpress.com/item/32963363300.html

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vert
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Re: New A20M Model ?

Post by vert » Tue Nov 05, 2019 4:07 am

the years old firmware provided by geeetech is in a word atrocious to say the least.

theju
Posts: 14
Joined: Mon Nov 04, 2019 6:03 pm

Re: New A20M Model ?

Post by theju » Tue Nov 05, 2019 5:08 am

Thank you for your ansmers, I've finaly cut the piece, all is OK.

I've received a new BLtouch and installed it.

But I'm unable to upload the firmware. I'm facing the timout error :

Code: Select all

avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: ser_send(): write error: sorry no info avail
avrdude: stk500_send(): failed to send command to serial port
avrdude: ser_recv(): read error: Descripteur non valide


avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_getsync(): timeout communicating with programmer
I've tryed with arduino 1.6.5 and 1.6.10 -> same error
I've tryed with several USB cables -> same error
I've tryed to modify the mega.menu.cpu.atmega2560.upload.speed to 57600 -> same error


I used to have problems to flash my other printers and decide to open the priter to uplod with my USBAsp adapter.
And surprise, no connectors, it seems to be a new bord, marked as GT2560 v3.1
20191104_220859 (1).jpg
20191104_220859 (1).jpg (157.04 KiB) Viewed 1383 times
If any of you as an idea or links, let me know !

Thank you in advance.
Ju

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vert
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Re: New A20M Model ?

Post by vert » Tue Nov 05, 2019 5:36 am

theju wrote:
Tue Nov 05, 2019 5:08 am
Thank you for your ansmers, I've finaly cut the piece, all is OK.

I've received a new BLtouch and installed it.

But I'm unable to upload the firmware. I'm facing the timout error :

Code: Select all

avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: ser_send(): write error: sorry no info avail
avrdude: stk500_send(): failed to send command to serial port
avrdude: ser_recv(): read error: Descripteur non valide


avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_getsync(): timeout communicating with programmer
I've tryed with arduino 1.6.5 and 1.6.10 -> same error
I've tryed with several USB cables -> same error
I've tryed to modify the mega.menu.cpu.atmega2560.upload.speed to 57600 -> same error


I used to have problems to flash my other printers and decide to open the priter to uplod with my USBAsp adapter.
And surprise, no connectors, it seems to be a new bord, marked as GT2560 v3.1

20191104_220859 (1).jpg

If any of you as an idea or links, let me know !

Thank you in advance.
Ju
if your a windows user did you install the drivers or did they auto install check the device manager with the printer plugged in also make sure your on the right com port for the printer you could be trying to flash the computers com port.

theju
Posts: 14
Joined: Mon Nov 04, 2019 6:03 pm

Re: New A20M Model ?

Post by theju » Tue Nov 05, 2019 6:21 am

Hi Vert,

Good idea ! I had install the drivers manually...

I ask windows to auto update driver, reboot and flash is complete with arduino 1.6.8 !

Last question to go further, did someone know wich drivers are installed to my card ?

Regards,
Ju

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vert
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Re: New A20M Model ?

Post by vert » Tue Nov 05, 2019 6:25 am

theju wrote:
Tue Nov 05, 2019 6:21 am
Hi Vert,

Good idea ! I had install the drivers manually...

I ask windows to auto update driver, reboot and flash is complete with arduino 1.6.8 !

Last question to go further, did someone know wich drivers are installed to my card ?

Regards,
Ju
stepper drivers? generally there a4988 stock.

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