Machine: LAYZOR K40 Conversion
Board: Cohesion3D Mini with GLCD Adaptor
I have moved my fully functioning Cohesion3D Mini setup from my K40 during a LAYZOR conversion build. In the process I now have a dedicated 24V power supply which is powering only a fan and the mini.
What I am finding is that if I start the machine without USB connected to my PC, the LCD does not function correctly and instead displays this pattern.
If I start the machine with USB connected everything works fine and the LCD displays the Smoothie DRO and menus as normal.
The power is being supplied to the dedicated 24V header and I have measured it while powered on and am getting the required 24V so I don’t believe it is a power issue.
The LCD is a standard RepRap Discount Full Graphic Controller, not sourced from the Cohesion store however I have tested it also on 3D printers and it works fine there (and of course it is working when the USB is connected to the Cohesion.
Note also that even with the USB not working correctly, if I then subsequently connect the USB, while the LCD stays corrupted, I can fully access the Cohesion through Pronterface and perform normal operations, so the board is running.
I’ve tested with shorter cables for the display but since it does work when the USB is connected this seems unlikely to be the issue.
Any ideas would be appreciated. While I can still use the system tethered, which I will do most of the time anyway, when doing maintenance it can be very useful to have the stand-alone DRO.