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#1
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I bought a 500 W ATX power supply to power-up my stepper motors. Unfortunately as soon as I run a program in Mach2 the power supply shuts down immediately. After turning off and back on it fine again. Does the power surge pop an internal fuse? What can I do to prevent that? P.S. I posted that question already this morning but it doesn't show up.... so here again |
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#2
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You need to load the 5 volts output with 1-2 Amperes minimum (5 or 2.5 ohm 10 watt resistors) in order to get a stable output on the 12 volts., that load should be applied all the time. Those resistors will be hot, so keep them attached to a heat-sink or use a fan to keep them cooler... |
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#4
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| Agrees... there is a good demonstration of converting an ATX power supply on the web. I'm sure I googled it using "atx" and "power supply". It said about putting a load across a couple of pins and heatsinking the resistor. Watch out if you've got a Dell PSU, they used their own wiring spec, which was different to everyone elses between certain years and you could blow the thing up!
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