MKS-SERVO42C
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makerbase-mks
Servo42c freezes if EN pin is connected to the main board
hi, I accidentally connected the 6-wire connector backwards. After I discovered this and connected the connector correctly, the controller behaves strangely: if the EN pin is connected to it, the controller freezes immediately after booting (at the ANGLE/ERR/CLK screen).
If I disconnect the EN pin from the board, the controller works as expected, but I have to set the EN parameters to "hold".
Here's how the Main board -- Controller were temporarily connected: 24V -> DIR GND –> STP 5V -> EN EN -> Vkom STP -> GND DIR -> VCC
I checked the circuit and it looks like the problem may be with the controller's port PB07, optocouple U8 EL357N or Q1 2N7009. Any ideas how to fix this? Did I burn PB07?
Thank you
Something fried, replace these two components if you can.
Hello, it looks like the problem is in the program, not the hardware.
I don't recommend buying this controller from Aliexpress because several new controllers bought there are also malfunctioning.
Motor hanging at power on, and needing the EN pin disconnected seems like a hardware issue.
Motor hanging at power on, and needing the EN pin disconnected seems like a hardware issue.
It happens randomly. Sometimes the controller loads and works correctly, but most of the times it freezes in a second after loading.
Then I would check for intermittent connections, short circuits or cold joints on the pcb
Then I would check for intermittent connections, short circuits or cold joints on the pcb
Looking at reviews on Ali, I am not the one who faced that problem so it seems the problem is with controller itself. I tried it on a CNC and 3d printer, same results. Common drivers work correctly.
I don't doubt there is a hardware issue with your motor's board. I'm just saying it either happened because you connected the cable plug wrong, or the board had a problem from the beginning. You said it yourself in your first post: " I accidentally connected the 6-wire connector backwards. After I discovered this and connected the connector correctly, the controller behaves strangely". Personally I have three SERVO42C, all working consistently, they just need a lower frequency signal (at least on my printer), so I set them up as TB6560 in Marlin.