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October 18, 2018, 05:48:31 am


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Author Topic: Mach 3 Question  (Read 1778 times)
Terminal_Crazy
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« Reply #15 on: January 03, 2018, 22:14:20 pm »

Something to warn about SSRs. Common failure mode is shorted ON! The one for my heated printer bed nearly destroyed it failing that way.

Evening.
Please don't take this the wrong way....

Is that fact or experience (any documentation?) ?
In 10 years diagnosing & fixing heated cabinets and large 3ph ovens, I don't recall one failing ON, but that doesn't mean it can't happen.

Used plenty of Crydom, Siemens Sirius, Omron.
If given a choice a 380/400v rated onewould probably better resist breaking down than a 220v unit.

discuss!

HTH
Mitch
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Thanks
Mitch
chuckeroo
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« Reply #16 on: January 03, 2018, 23:01:05 pm »

3 phase oven what kinda pie you baking.
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lloydsp
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« Reply #17 on: January 03, 2018, 23:48:44 pm »

"Switching" supplies (like an ATX) tend to have a significant startup time... sometimes a second or more, and they also take some time to 'turn off', if not heavily-loaded.

If you use those commands to switch such a power supply on and off, take care to also introduce sufficient delays to accommodate the behaviors of switcher supplies.

Lloyd
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"Pyro for Fun and Profit for More Than Fifty Years"
chuckeroo
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« Reply #18 on: January 04, 2018, 00:53:30 am »

I didn't know that thanks LLoyd.Thanks
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