New A20M Model ?

[theju]

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 (179.3 KiB) Viewed 43888 times

Is there a spare part to change the carriage ?

Thanks
Ju

[DzzD]

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.

[theju]

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]

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

[theju]

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 (157.04 KiB) Viewed 43866 times

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

Thank you in advance.
Ju

[theju]

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

[theju]

yes stepper drivers.

I've seen nothing on them. It is for selecting in your Marlin 2 config.

Thanks

Ju

[psxsnake]

I have same model variation.
Where you connect bltouch?

[theju]

I have same model variation.
Where you connect bltouch?

You have the 5 pins at the top of the small board, just under the big connector

Ju

[theju]

I have same model variation.
Where you connect bltouch?

You have the 5 pins at the top of the small board, just under the big connector

Ju

Here the photo much easier to understand.

20191106_205327.jpg (311.75 KiB) Viewed 43241 times

Does anybody know what is the 3 poles connector under ?

Ju