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Thread: Garbled LCD screens
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09-01-2015, 06:27 PM #21
- Join Date
- May 2015
- Posts
- 3
During 3 months after adding the serial resistors I caught garbled display only once (without the resistors display was garbled every few minutes).
If I was designing a new controller board, I would further improve LCD interface, but there are a lot of other terrible things in cheap 3D printer electronics, like MOSFETs driven directly from controller outputs, endstops with NO switches, or electrolytic capacitors placed directly under hot stepper motor drivers.
So taking into account all these potential problems, I would say that 1 LCD error during 3 months is acceptable for me.
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09-02-2015, 01:54 AM #22
- Join Date
- Jun 2014
- Location
- Burnley, UK
- Posts
- 1,662
The whole world drives MOSFETs from micro outputs now. Good design it isn't, cheap it is.
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09-09-2015, 11:39 AM #23
- Join Date
- May 2015
- Posts
- 3
But the whole world doesn't use PWM with MOSFETs driven directly from MCU outputs...
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09-11-2015, 08:05 AM #24
- Join Date
- Jun 2014
- Posts
- 349
My display only garbles, sometimes, when inserting/removing the SD card while powered on. One button push fixes it. I know it should be powered off.
More interesting is that the other functions that the button controls sometimes takes repeated button pushes to activate; I know each push is working because it makes it's little click, but sometimes five pushes are needed for the function to activate.
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01-03-2018, 03:15 AM #25
- Join Date
- Jan 2018
- Posts
- 1
Printbus and ESS, I cannot say thanks enough to you both. I had already shielded the LCD ribbon of my ANET A8 but the screen still failed once every 3 min or so. I then installed only one 47 Ohm resistor directly on the LCD PCB in serial of the ENABLE signal and combined with the shielding connected to ground, it's now working very very well.
I have not yet the feedback over a long print but definitely it helps a lot.
But ENABLE+47Ohm alone or shielding alone is not enough (for me)
ANET_LCD_solution.jpg
Ender 3v2 poor printing quality
10-28-2024, 09:08 AM in Tips, Tricks and Tech Help