Re: Servos

I am in the process of doing exactly this right now. There is no
doubt in my mind that the servo's are superior, however they require
more work. I personally decided to stay with the steppers for a
number of reasons.

1. Dead Reliable Motors.
2. Already Owned them on the Machine. (Less Work)
3. Commercially Available Stepper Drives (Gecko)

So my priority is to get the machine up and running with a minimum
amount of re-work and frustration. Since you can microstep the
steppers after the upgrade, the stepper motors all of a sudden are
not .001" but become .0001" per microstep. Additionally by raising
the supply voltage to the motors from 56V to 70V I should see an
improvement in the rapids... not light years faster, but enough to be
a benefit. Assuming that I kept the rapids at the same speed as
before and I increased the machine resolution by a factor of 10 I
would still be thrilled.

Stay with the Steppers and buy yourself a VFD instead. That way you
can control the spindle speed with the CNC controller instead of
having to spend money on Servos. Unless for some reason you need the
servos.

Mark

--- In CAD_CAM_EDM_DRO@y..., "machinist24540" <ace@d...> wrote:
> Hello,
> Has anyone homebrewed an upgrade/retrofit using servos on a BP BOSS
> or manual?
> I was wondering what would be involved.
> Would I see a big difference with the servos over staying with the
> steppers? (other than having a .001" step?)
> Thanks for your input.
> John