Re: [CAD_CAM_EDM_DRO] Re: Chopper Transient Suppression

Thanks to both of you for the info. As it happens I was writting a .WAV
to GCode converter last night, so I was looking for info about how the
audible frequency of the motor releates to the step rate and therefore
the feedrate. Gcode really doesn't provide the kind of control
necessary for the best conversion, and it doesn't work at all without CV
(it just make lots of nasty clunks with all the starting and stopping at
each very short segment).

For best results I'd probably have to bypass gcode entirely and generate
the required pulse trains directly. And from the sound of it, if I were
using Gecko's I'd have to detune them to hear anything anyway :)

The project was inspired by a couple of wav files of F1 race car engines
playing music with precise throttle control. Amazing stuff.

<http://www.autoblog.com/2005/10/23/from-the-renault-v10-a-real-swan-song/>

Anyway, thanks again for the info,
Dave K

Jon Elson wrote:

>Codesuidae wrote:
>
>
>
>>Mariss Freimanis wrote:
>>
>>
>>
>>
>>
>>>You are probably using a "constant off-time" switching topology. The
>>>screeching, grunting, whistling, hissing, etc. comes for free with
>>>that method.:-)
>>>
>>>
>>>
>>>
>>>
>>>
>>Do Gecko's make the steppers hiss and screech?
>>
>>
>>
>>
>Since Mariss didn't answer this specific question, the answer is, NO.
>They are essentially silent when stepping slowly or standing still.
>
>
>
>>When they run a curve do the steppers make a nice tone?
>>
>>
>>
>>
>When properly adjusted, they make almost NO sound at all! Just the
>faintest whine when accelerating or decelerating. The Gecko drives
>are the quietest I've ever used. If any other motors are running in the
>area, you won't be able to hear the motors run by a Gecko drive at
>all. The drives, themselves, of course, make no sound at all.
>
>Jon
>
>
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