Handwheels again?!? was Re: true closed loop vs. hobby closed loop

Thank you Marcus.

These folks are talking about manual machines which have been
retrofitted, so let's assume that the location of the handwheels is
not too much a problem... Because you can put the motor on
the "other" end of a table, which will keep the X HW where
you're "used to". And the Y HW might be a bit closer, but still in
the same general area. BUT...

The added drag of the motors is gonna affect the "feel", AND the
probability of ballscrews--compared to the original acme's, in most
cases, is gonna further the difference...

One more thing to be addressed is whether the retrofit has left hand
threads where the manual machine used them. This is pretty important
for someone who has manual experience; because if the cheaper RH
screws are used in the retrofit, ther's likely to be a bunch of
wrecked parts when the "manually used" cnc retrofit doesn't "turn"
the "right" way...

Ballendo

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Marcus and Eva"
<implmex@a...> wrote:

> Yeah:
> Especially when they slap you in the gonads at a couple of hundred

RPM.

> Trying to use a handwheel equipped CNC for manual milling is a real

pain.

> For safety reasons, most manufacturers either spring load them to be
> normally disengaged, or they make the handles fold and spring load

them to

> be normally folded in.
> It is unbelievably annoying to try to mill something with this

arrangement.

> Every time you want to grab a handwheel, it's either ineffective or

not

> where you put your hand.
> That breaks the rhythm of your work so badly that it's almost

impossible to

> be productive.
> I'm with Ballendo on this one!!.
> Cheers
>
> Marcus
> ----- Original Message -----
> From: "ballendo" <ballendo@y...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Monday, March 08, 2004 11:19 PM
> Subject: [CAD_CAM_EDM_DRO] Handwheels again?!? was Re: true closed

loop vs.

> hobby closed loop
>
>
> > Kevin,
> >
> > You have CNC. Why on earth would you need handles?!?
> >
> > And just think, the Bridgeport engineers left them off of

hundreds of

> > machines... (Were they dummies to do so?) Bacause they
> > certainly "could have" left them on if they thought there was a
> > reason... (It's not like they didn't have them "available" in the
> > Bridgeport factory!)
> >
> > I'll never understand this idea that handwheels are somehow a good
> > thing to have on a cnc machine. I've laid out the reasons I feel

this

> > way many times before; so I won't repeat them here...
> >
> > Suffice to say that being able to move in any given increment, at

a

> > speed faster than I can turn any handwheel, and stop on the EXACT
> > spot I desire repeatedly, for me at least renders handwheels
> > unnecessary... (and a safety hazard)
> >
> > Ballendo
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Kevin R. Walsh"
> > <krwalsh@y...> wrote:
> > >Anyone have any luck fitting handle to the old Bridgeport CNC
> > machines? I can easily get one on the Z drive. The Y drive I

could

> > maybe see how I can modify the belt cover and put a handle in.

What

> > about the X?
> > >
> > > Thanks
> > > Kevin
> >
> >
> >
> >
> > Addresses:
> > FAQ: http://www.ktmarketing.com/faq.html
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