That's a point in favor for discreet components and standard ICs over
special/custom ICs. Very little worry about having to alter a design or things
becoming unfixable due to a fancy chip being discontinued.
I forget how many $K I was quoted from a manufacturer to pop out one new late
90's vintage 120VDC servo amp, but still amazing that every component (or close
enough) was still available. But it was less expensive to buy three big
steppers more powerful than the old servos, and the drivers and power supplies
for less than the cost of one vintage servo amp copy.
On Thursday, July 16, 2020, 12:21:52 AM MDT, John Dammeyer
<[email protected]> wrote:
> -----Original Message-----
> From: andrew beck [mailto:[email protected]]
> Sent: July-15-20 10:03 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Retrofit Candidate?
>
> John do you have any details on the new stumble drives?
>
As far as I know they are still testing with now discrete transistors instead
of the driver pack that was discontinued shortly after they produced it. I
have 3 of the STMBL drives and a couple of spare part drivers. One STMBL on
the spindle and I was thinking replacing the HP_UHUs for the two brushed DC
Servos. However, couldn't get rid of the whine so went back to the HP_UHU.
But then I've also got 2 extra HP_UHU drives that are partially assembled. And
now a two US Digital encoders that were replaced with CUI that work better.
And then there's the extra Shumatech DRO-350 kit still in the box and the two
DRO-550 of which I only assembled one but haven't used yet.
Oh and the 400W Bergerda AC servo. Ran the X axis really nice but nowhere to
mount the drive in the present cabinet.
Oh the list goes on....
Cheers
John
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