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Laser Show with Step Motor is closed loop?

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Fred_DASP

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Feb 24, 2008
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I wanna do a lasershow with step motors.

I saw a lot of schematic where to draw with good precision, is necessary a closed loop control (PID, or only PD)

I saw too many lasershow using step motors instead of galvos.

Those L.Show do a good job? There is a closed loop controls ?
 





MarioMaster

MarioMaster

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Jul 27, 2007
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closed loop implies the idea that the scanner control has feedback from the motors (usually an optical encoder of some sort) and while stepper motors can be used for a basic laser show, they lack the speed and precision needed to do complex scanning
 
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Fred_DASP

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Feb 24, 2008
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MarioMaster, so, you confirm my thought... with step motors, the LS don´t have feedback.

Andy: nice link!
 
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