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In Reply to: RE: What type of controls work with this Garrard 401? posted by coffee-phil on January 16, 2017 at 09:56:06:
Thank you for the informative post, Phil. It really helps my understanding along to realize it is a form of induction motor I have.
When I look at my grid it looks mostly sinusoidal but there is a distinct lumpiness to it most of the time. Hard to say what the definition of "good" is...I think it looks pretty bad. It is the wild west out here after all. No harmonics initiative in my neighborhood.
Since I have no idea what this or any other 401 sounds like stock or what others are doing with theirs to get them running optimally I figured now would be a good time to try and find out if this disappearing Phoenix Engineering hardware should be of any interest to me. It is a neat old looking turntable that I had hoped to one day give some love to to find out if I like it.
Since I think I may already own one I would love to learn Garrard 401 owners get the best speed control results from the stock eddy brake rather t5han some aftermarket solution.
I think the Eagle Power Supply is a larger drive capable of 3phase output at 25W per phase and can take the velocity feedback from the Roadrunner product to close the automatic velocity control loop.
I don't know all the details but I recently read rumor some type of induction motor controls can be done with the Phoenix stuff.
It may be tho whole point is moot now that there is no support with questions in my mind such as : is the closed loop bandwidth, tach resolution, etc sufficient for doing an idler drive speed control? For all I know the Phoenix speed control stuff may have been targeting belt drive systems but again, I have no idea.
I guess the distinct lack of a response on this forum to my query from anyone doing what I'm asking may be evidence not many, if any, are doing this.
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Follow Ups
- RE: What type of controls work with this Garrard 401? - Ugly 01/16/1720:28:29 01/16/17 (5)
- Search "Mark Kelly" - Lew 07:39:08 01/17/17 (3)
- RE: Search "Mark Kelly" - Ugly 15:46:43 01/18/17 (0)
- RE: Search "Mark Kelly" - coffee-phil 14:26:07 01/17/17 (1)
- Phil, I think you are correct... - Lew 11:48:44 01/18/17 (0)
- RE: What type of controls work with this Garrard 401? - chasmturner@yahoo.com 20:51:04 01/16/17 (0)