Adafruit Thermal Printer Guts Issue

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bardankafle
 
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Adafruit Thermal Printer Guts Issue

Post by bardankafle »

Hi, I'm having an issue printing with the thermal printer guts using A_printertest on an Arduino Uno. I have it all wired correctly and the red light turns on and blinks. I've tried supplying it the minimum voltage/amperage as well as the max however nothing prints. I've also tried turning the ribbon cable around. Nothing seems to be working, does anyone have any ideas on how I can get it to print?
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bidrohini
 
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Re: Adafruit Thermal Printer Guts Issue

Post by bidrohini »

Do you have the same printer that is shown here? https://learn.adafruit.com/mini-thermal ... controller
Or anything else?

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bardankafle
 
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Re: Adafruit Thermal Printer Guts Issue

Post by bardankafle »

bidrohini wrote: Tue Jan 10, 2023 9:13 am Do you have the same printer that is shown here? https://learn.adafruit.com/mini-thermal ... controller
Or anything else?
https://www.adafruit.com/product/2753
its this but should be the same yes

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adafruit_support_carter
 
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Re: Adafruit Thermal Printer Guts Issue

Post by adafruit_support_carter »

You need to also connect a GND wire back to the UNO. This is the "signal" ground as mentioned here:
https://learn.adafruit.com/mini-thermal ... ts-3133462

You only have power ground connected.

Also be careful about the actual pins/wires being used. See comment at that link about verifying pins by reading the printer's PCB labels.

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