On 11 April 2018 at 09:11, jeremy youngs <jcyoung...@gmail.com> wrote:

> The red caps are generally 2-3 k rpm , what response do you need at your
> lowest rpm? And what is the lowest rpm. The red caps will give you great
> low end torque but will have a threshold below which it will be weak
> usually under 50 rpm on a 3000 rpm motor most drives give a 50:1 rpm ratio,
> my carotron ( 5hp drive , driving a 3kw baldor servo motor) only gives a
> 20:1 and my low rpm below 50 can be hand stalled easily at 52 it will burn
> your skin off.

That doesn't sound right.

A brushless servo should be able to give rated torque indefinitely at
absolutely zero rpm.

It sounds to me like your drive might be set up funny?

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

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