Ramps 1.4 cuts off when servo moves April 22, 2015 05:40AM |
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Re: Ramps 1.4 cuts off when servo moves April 22, 2015 07:34AM |
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Re: Ramps 1.4 cuts off when servo moves April 22, 2015 11:41AM |
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Re: Ramps 1.4 cuts off when servo moves April 22, 2015 03:35PM |
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Re: Ramps 1.4 cuts off when servo moves April 22, 2015 03:39PM |
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Re: Ramps 1.4 cuts off when servo moves April 22, 2015 04:01PM |
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Re: Ramps 1.4 cuts off when servo moves April 22, 2015 04:05PM |
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Re: Ramps 1.4 cuts off when servo moves April 23, 2015 04:45AM |
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Re: Ramps 1.4 cuts off when servo moves April 23, 2015 09:56AM |
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Re: Ramps 1.4 cuts off when servo moves April 23, 2015 12:22PM |
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Re: Ramps 1.4 cuts off when servo moves April 23, 2015 01:53PM |
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Re: Ramps 1.4 cuts off when servo moves April 23, 2015 03:07PM |
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Re: Ramps 1.4 cuts off when servo moves April 23, 2015 05:04PM |
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Re: Ramps 1.4 cuts off when servo moves April 23, 2015 05:36PM |
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Re: Ramps 1.4 cuts off when servo moves April 24, 2015 11:53AM |
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This presumes that the signal has the chance to backfeed the microcontroller via the signal line. Depending on the servo, the signal wire may be effectively isolated electrically so that the servo's supply voltage can't backfeed the pin.
Re: Ramps 1.4 cuts off when servo moves April 24, 2015 01:27PM |
Registered: 10 years ago Posts: 869 |
No, he's using the Arduino's regulator to produce the 5V to power the servo which can produce the results he's experiencing. When he plugs in the USB cable, the 5V is pulled from the USB connection bypassng the regulator. My guess is that he's right at a threshold where the regulator struggles, but the USB connection doesn't for whatever reason.Quote
gordonendersby
I got the impression he was on the limits of his existing supply.
Many power supplies still need the resistors though. A 4.7 ohm power resistor on the 5V rail to provide the power regulation is using about an amp of current and needs to dissipate 5 watts unnecessarily. It's not going to break the bank, but it's an unnecessary loss. And if you don't happen to have the resistor laying around, buying one online probably is going to cost as much as just getting a cheap buck-boost power supply.Quote
With the 2 12v rails on modern atx supplies your effectively getting 2 power supplies plus the other power rails..
The only fiddling is sticking a cheap chunky resistor on the 5v rajl and attach it to the case to disipate heat.
I bought some cheap extension cables for the atx plugs and extended them to the printer.
No hacking of cables either. Its not a messy solution anymore.