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RE: Another DIY 3 phase variable frequency drive for Papst motor update.

Hi Twystd,

Thanks for the link. You are correct in that absolute frequency accuracy is not important as long as the stability and resolution is sufficient. In the end you will be adjusting the frequency to get the speed which you want.

I may just order this thing. I have also found others fully packaged which go up to several MHz and would be usable as lab instrument.

Is the unit which you have user friendly? I just see little buttons. Can you direct enter frequencies or do you have to scroll?

May I ask why when you have a belt drive platter and belt drive capstan machined into you motor shaft you are going to an idler drive?

I still have not gotten to the Little Bear. It still has the bogus RIAA feedback network in it. I may just go back to my 40 dB network which worked OK. Ideally I'll finish Lipschitz' paper and calculate the values according to his equations. It is still on my list of things to do. Thanks for the tubes by the way. I will definitely try them after I get the LB up and running again.

Phil

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