G'day Jim
At first I took note of your caution about connections in the motor
circuit***. However reading the KBE data showed that they allowed for
a fuse in the armature circuit; that would open circuit to operate.
They do caution about switching so I guessed that they are concerned
about motors being switched on to the drive with either back emf or
no emf with the controller outputing volts. Remember the mods to the
reversing switching of the earlier lathes?
My system is 240/230 volts so my currents are half that of a 110
system. For 110 volt systen a 0-10 amp meter would be needed for a
350/400W motor.
***OK for KB controllers but other units would have to be assessed on
their merits.
I posted a bit more info in my email addressed to John
(born4something). John was concerned about the effect of the waveform
on meter accuracy. I don't think it is an issue because the
industrial drives with which I am familiar (up to 1500HP) have used
moving coil meters connected across shunts. I think the armature
inductance smooths the current enough for the meter.
I am hoping the meter will be useful when parting off as I frequently
stall the lathe, even with a 1/16 blade. That is why I wanted it at a
place where I can see it when operating the cross slide. It certainly
confirmed I need to change out the horse power resistor; I got short
changed.
The KB controllers are industrial quality and are well supported with
data; I haven't asked, but I quess replacements are availble ex stock
in Oz. Baldor are the Australian representative.
Thank you for your help.
One good turn deserves another.
Regards
Ian
--- In 7x12minilathe@..., "Jim RabidWolf"
<unclerabid@...> wrote:
oh, and I'd love to see the pictures, even if you just want to e-
mail them
over to me ( use radid@... - that's my own domain, so lot's more
storage there - this mailbox is a bit on the skinny side)
Thanks!!
