@dc42 Could you help me solve this problem?

@dc42 Because the UV module requires 24V to close it, and out_5 on Duet 3 MB 6HC can only output 12V, so I just connect it to a DC-DC converter.
At first, I used io_out(3.3V), however, the converter min_input voltage is 4.5, so converter didn't work. Then I choose out_5 because out_1-3,7-9 are used.![alt text]

@dc42 I understand. So how can I solve this problem?

@dc42 About the two errors: G0/G1 insufficient axes homed; 12V under-voltage event（8.9V）, do you have any solution?

@dc42 Thanks for your advice and I just connected OUT5 port to the PLC's input+, GND port to the PLC's input-. Then I use M42 P3 S1 to let ports output, but it didn't work at all, and I use voltmeter to measure the voltage between OUT5 and GND, it seems to be 0. Is there any mistake?

@dc42 Now, I use the OUT5 GND port to control the UV module——I add <M950 P3 C"out5”> to config.g，and define M14.g: M42 P3 S1, M15.g: M42 P3 S0. And connect V_OUTLC1 to the module's V＋，connect out5 to the module's V-.

However, when I run the M14 in the system, two errors appear: G0/G1 insufficient axes homed; 12V under-voltage event（8.9V）. For the second error, I just test the output voltage of out5 which I use, it equals to 12V, so I don't know whether it is because of other out port.

@dc42 the PLC interface

@dc42 Please look the link: https://dymax.com/products/equipment/light-curing-equipment/spot-curing-systems/bluewave-qx4-v2.0.

Thanks for your time.

Hello everyone,

I am using Duet 3 MB 6HC to control a UV curing module(0V for turning on, 24V for turning off). I use "M950 P3 C"io6.out" to define the output IO port number. Then I use "M42 P3 S0/S1" to control whether this port can output.

However, when I send "M42 P3 S1" to the system and use Voltmeter to measure the output voltage, the value is almost equal to 0 but not 3.3V as the document said. And I use a Boost module to increase output voltage, it also don't work.

So I want to ask whether I used M-CODE incorrectly or am I missing some necessary operations？

I am looking forward to your reply.