Re: ball screw conversion

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "roboticscnc" <gsm42@...> wrote:
>
> I would like to have MPGs for manual control and a button for power
> feed.
> It seems that you can't have both in Mach 3 without changing the jog
> mode.
> If you're using a machine ( Lathe ) manually you should be able
> to have power feed as well as handwheel control. I don't understand why
> they are mutually exclusive in Mach 3.
> Glen.
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, Will Holding <76lancia@>
> wrote:
> >
> > That is one nice way to do it if you have the ability, I/O, and
> inclination to build it, I agree.
> >
> > I get by wth a pendant with a proportional joystick that coves the
> directional moves and the speed, depending on how far you push it over,
> >
> > OR
> >
> > My wireless keyboard that has a trackball at the right thumb position
> and mouse buttons at the left thumb position. Mostly I use this because
> I'm free to move around the machine while holding the KB like a tablet
> and enter my MDI, etc on the fly.Yeah, I guess you could go portable
> with 4 MPG's as well, my machine does not have that many inputs even
> with the 2 ports. Which means I would have to learn the whole Modio
> thing and that's a bit too much for me at present.
> >
> > BTW, I don't mean to spam this list but I have a really nice aluminum
> enclosure that I'm not going to use, it's a Rittal 6000 series and I
> think it lists at something like eleven hundred bucks? I got it a lot
> cheaper, it's brand new but missing one small cosmetic trim that I
> wasn't going to use anyway., and I'd take $200 plus shipping on it if
> anybody is interested. It has an upper area for a computer monitor/flat
> panel mounting and a lower panel that's prepunched for buttons, both are
> 1/8" removable aluminum.Then it has a swing door with a latch, and I
> have the original cable grommet, misc hgardware, plugs ,paperwork, etc.
> Email will dot holding at customarchitectural dot com if you are
> ointerested or know somebody who might be, feel free to pass it on.
> >
> > -Will
> >
> >
> >
> >
> >
> >
> > ----- Original Message -----
> > From: Leslie Newell
> > To: CAD_CAM_EDM_DRO@yahoogroups.com
> > Sent: Thursday, December 03, 2009 2:13 PM
> > Subject: Re: [CAD_CAM_EDM_DRO] Re: ball screw conversion
> >
> >
> >
> > Hi Will,
> >
> > I have multiple electronic handwheels (high resolution MPGs), one
> per
> > axis and I find I use them an awful lot. I never jog using the
> keyboard.
> > With electronic handwheels you don't have any 'feel' for the cut but
> > you can compensate by listening to the cut instead. Using MPGs in
> this
> > way gives you the best of both worlds. The control software always
> knows
> > exactly where the machine is so you can mix MPG moves and MDI moves
> and
> > you have conveniend DROs showing your position. I do this on my
> > Colchester lathe running EMC and my mill running Mach. On the lathe
> I
> > also have a switch that sets the scaling of the wheels so you can
> > rapidly move the saddle from one end of the bed to the other or
> easily
> > take tiny precision cuts at the flick of a switch.
> >
> > The handwheels are ordinary machine handwheels mounted on a shaft
> that
> > is supported by a couple of skate bearings. The shaft has a friction
> > brake to give it a bit of resistance. On the back of the assembly I
> have
> > a cheap 500 line encoder.
> >
> > Les
> >
> > Will Holding wrote:
> > > I think he meant homeshopcnc.com
> > >
> > > You can also mount the handwheels to your pulleys. Unless you
> provide a way to remove the belts or make one of the pulleys freewheel,
> you will get cogging from the steppers when using your handwheel, go
> fast enough and the stepper will suddenly try to brake your handwheel
> motion. Rather annoying IMO.
> > >
> > > You will find you don't need the handwheels at all. People told me
> this and I didn't listen.Using a pendant jog stick or even the keyboard
> is much better than hand turning the wheels, it's like having a perfect
> power feed in all directions.
> > >
> > > You really will never use the handwheels- even for picking up a
> center.
> > >
> > > My .02
> > > -Will
> > >
> > >
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>