making a bench top PSU with a old school PSU

[yongkimleng]

After so much speculation.. just drop us a pic of it, easier to make deductions

[Al Skierkiewicz]

You also may want to consider that some supplies will not turn on without a minimum load. As stated above, these supplies do not play well with motors as loads. It is not so much the inductance as the stall current. A motor that is not moving is stalled and as such the current demand for many motors exceeds 30 amps when starting. Kit motors like the Chalupas and FP motors exceed 90 amps.

[Qbranch]

Originally Posted by Al Skierkiewicz

You also may want to consider that some supplies will not turn on without a minimum load. As stated above, these supplies do not play well with motors as loads. It is not so much the inductance as the stall current. A motor that is not moving is stalled and as such the current demand for many motors exceeds 30 amps when starting. Kit motors like the Chalupas and FP motors exceed 90 amps.

in other words.... DANGER WILL ROBINSON!!!!

[yongkimleng]

Originally Posted by Al Skierkiewicz

You also may want to consider that some supplies will not turn on without a minimum load. As stated above, these supplies do not play well with motors as loads. It is not so much the inductance as the stall current. A motor that is not moving is stalled and as such the current demand for many motors exceeds 30 amps when starting. Kit motors like the Chalupas and FP motors exceed 90 amps.

One way to run such motors safely is to throw in a relatively large wattage resistor of a certain amount of resistance calculated from your motor, to limit the inrush current. You should end up with a slow-starting motor.

[John Gutmann]

I will have a picture up in about a day or so. I am NOT using it to run a huge motor with, I have no idea where people got that idea from. Honestly I dont know who in their right mind would run a robot motor off a bench top power supply.

[Justin Stiltner]

Atx power supplies will normally shut down if you try and demand too much current from them, then you just unplug the power cord, and plug it back in and dont do what you just did agin lol.