Hi Gene,
Are you sure your drive isn't shutting down due to over voltage rather
than over current? The only way to brake a 3 phase motor without pumping
power back into the bus is to use DC braking. DC braking can cause rotor
heating problems on machines that decelerate often.
Les
On 02/01/2018 17:42, Gene Heskett wrote:
And they are full 4 quadrant controllers, so within reason no braking R's
are required. Laying on the table, I can reverse a 1hp 3 phase motor
turning 2400 revs, fast enough to make it jump 3" up in the air with one
of those 1.5 horse rated, $128 on ebay controllers. Installed on a lathe
with an 8" chuck, I have to program it to take a bit over a second to
reverse that 8" chuck from 200 revs because I have to set a limit of the
decel current else it self protects with a total shutdown. So I am a
happy camper until I decide to put a 5 hp on my old Sheldon. Can I do
rigid tapping? Yup. I have hal code to tell me how much overshoot occurs
at the bottom of the hole, so I don't break taps hitting the bottom of
a blind hole.
Cheers, Gene Heskett
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