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Connecting servo

Posted by fma 
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fma
Connecting servo
March 21, 2017 03:26AM
Hi!

Is it possible to connect a servo on the Duet Wifi without one of the expansion boards?

Thanks,

Frédéric
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dc42
Re: Connecting servo
March 21, 2017 03:25PM
Yes if it will work with a 3.3V control signal. See [duet3d.com].

Edited 1 time(s). Last edit at 03/21/2017 03:26PM by dc42.


Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
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fma
Re: Connecting servo
March 21, 2017 03:40PM
Yes, the servo I plan to use works fine with 3.3V.

Ok, so, I just have to get the signal from the expansion bus of the Duet Wifi, and power up the servo from an external power supply (it can drain up to 2A when stalled)?

Frédéric
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dc42
Re: Connecting servo
March 23, 2017 03:26AM
The 5V supply on the Duet is rated at 2A and is already powering the Duet and the PanelDue if you have one. So yes, if your servo may draw as much as 2A then an external supply for it would be wise. If you don't expect it to stall in normal use then you could use the internal 5V supply. It is current limited so the occasional servo stall shouldn't damage it.


Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
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fma
Re: Connecting servo
March 23, 2017 04:32AM
Ok, thanks!

Frédéric
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