Does a MKS TFT32 work with a RAMPS 1.4?

[martind_n]

Hi Guys,

I'm trying to make the MKS TFT 3.2 work on RAMPS 1.4... I saw in some forums that this is not possible, and also read in other ones that it is...
I have exactly the same problem Linebyline told on the very first entry of this thread. TFT shows READY TO PRINT but it has no communication at all with the printer. I changed cables, baud rates, Marlin and TFT firmware config but nothing happens... Do you have any other idea? Does MKS TFT 32 actually work on RAMPS?

Thank you!

[martind_n]

Hi Lynebyline! What controller board are you using with this screen? How did you fix that communication problem between controller board and MKS TFT32? I'm facing exactly the same issue and already did all I could imagine to fix it without any luck...

Thank you!

[bustedparts]

I looked on amazon and it said that the MKS tft3.2 will not work with ramps 1.4. IDK if this could be worked around. I would really like to get a new screen for mine due to my rotary button was doa.

[vprheli]

Of course it works. TFT32 and TFT28 have the same firmware. Marlin printer firmware don't send out board type (Ramps or other) in the connection response. Therefore even if TFT itselv want detect printer board, it can't. The problem is in the communication. First - You need separate power 5V supply (200 mA is enough), and then the TFT Tx output (connected to the AUX1 D1 pin) must have more energy set it to LOW signal. One tranzistor and rezistor solve it, or use any AND gate (74XX08 or better 74XX244). Just make TFT Tx output more power, which it has not.