HELP Please 24V power supply went dead

[Lee Roberts]

Michael,

I have sent you a PM with the wiring pdf i send people.

The PSU i sent you was a PS407 this is rated at 40vdc 0a - 38vdc 7a. I dont actually sell a 42Vdc PSU ?

The document for the 25's from Roy is saying:

Power Input
Maximum input voltage 35V, recommended regulated voltage 24-30V although
the board will actually run down to 12Volts this will impair performance at higher
step rates.

If using an unregulated power supply, check peak voltage across output before
connecting Driver25 board. A 25V unregulated supply can have 35V peak
unloaded output. It may be necessary to place a load resistor permanently across
the output to reduce the peak voltage as when the boards are not Enabled the
power consumption is quite low.

If you are looping through to three or four stepper boards it is a good idea to return the last board power connections back to the power supply thus creating a ring circuit and halving any voltage drop across the connecting wires.

When you said "I don't know if the PS407 will have enough power as was using 350W" i still didnt know what driver units or PSU you had been using. This is why i compared the PS407 to the S35036 as this PSU was the closest match and you hadn't indicated an issue with the Output voltage.

So i assumed you was looking to replace an S35036 unit and would have been using the driver50 units, the driver50 having a Maximum input voltage of 48V.

You need to check with Roy to see if the LED's failing to stay lit is an indication of something, also ask him if supplying the driver units with 38v would have caused damage and what he would recommend you do.

Michael, please let me know what Roy has said. If you would like to contact me, please email me so we can get you sorted out.

Steve have you got a contact phone number for Roy?

Thanks,
Lee

[HiltonSteve]

Steve have you got a contact phone number for Roy?

Thanks,
Lee

No! Use email, that works best for Roy anyway.