help needed with breakout board UCNCV4

[Clive S]

thanks Clive, what voltage for the driver, and do I still need a separate 5 volt input to the breakout board, or will the usb be ok.

I cannot guess the voltage what does it say on the driver or the model number at least

[terry1956]

hi, the microstep driver is a FMD2740C . apart from adding a power supply to it is there any other wiring that needs to be put in place. also how do you find the pin numbers from the card. thanks

[Clive S]

hi, the microstep driver is a FMD2740C . apart from adding a power supply to it is there any other wiring that needs to be put in place. also how do you find the pin numbers from the card. thanks

Ok they are 50V drives so you will need about 36 - 45 volt DC power supply.

Also the dip switches you have them set at 0.5A which is far to low.. So set sw5 to on sw6 to off sw7 to on that will give you about 3 A

Are you using mach3 or what?
Edit I see it runs off usbcnc so I think this is the manual http://www.variometrum.com/PDF/USBCNC_csatolo_ENG.pdf

[terry1956]

Hi.on the motor driver there is a power in marked V+ which matches a terminal on the 36v power supply which came with the kit.however the second driver inlet is marked G for ground.the only G terminal on the power supply is on the inlet 240v side.the only free terminal is marked V-. So do I wire the driver G terminal to the G terminal on the power supply or to the free V- terminal. There are two leads on the driver,I take it the green one is power ok and the red one bad news.

[Ger21]

Post a picture of the power supply terminals.

[terry1956]

shows both units

[Clive S]

the -ve with the blue wire connected on the power supply goes to the GND on the driver next to Vin+

[terry1956]

hi clive, just did this and I had a green led showing on the driver and also the red one. I did not take things further. don't think that the red one is a good sign. so what to do next???

[Boyan Silyavski]

Find and read carefully driver manual. Possibly these EN+ and EN- are to enable the driver. But dont take my word, read the manual

[Clive S]

Find and read carefully driver manual. Possibly these EN+ and EN- are to enable the driver. But dont take my word, read the manual

Boyan the link is in post 9