Re: re:hand jive

Wally K. asks:

Hmmm i am getting confused here. All along i planned on putting
handwheels on my bridgeport conversion. It is the only mill i have
and can not imagine not having manual use. Many times i just want to
do simple things that would take a few minuits manually. It is hard
to belive cnc would be quicker. Also with CNC you loose the "feel of
the metal" That is nice when drilling or even milling sometimes.

I am wondering how many of you gave up manual control when you do not
have another mill or drill to use.


ballendo wrote:

> <jmw@c...>
> JonA gave the answer for handwheels (i.e., on the belt drive

machine,

> w/fold-in handles for safety) and Darrel brings up the point I'm
> going to second...
>
> Why on earth do you want handwheels after you spent time, sweat,

blood

> (prob'ly :-)), and money to ELIMINATE their need??? Even a simple

job

> is run more accurately by the CNC system than you! Even If you only
> use the cnc as a power feed with dro(using jog)! We all got thru

Y2K

> ok, right? So don't worry about the hand wheels and build the best
> system you can.
>
> Maybe on a sherline or servo(Brand) tabletop machine making

extremely

> small parts where "feel" is necessary, but on a full size mill?!?!
>
> You "may" want to think like the WWII bomber designers and provide
> some "backup system" to turn/move the axis(remember the Memphis

Belle

> movie), but this could be as simple as an appropriately placed

socket

> head cap screw so you could use a T-handle hex wrench to turn.
>
> Ballendo
>
>
> >If you've got a big servo coupled directly to the y-screw, how do
> >you hand crank the machine? <snip>
> >By now, after much painful trial and error, some standard practice
> >must have emerged in the CNC world. Can someone tell me what it is?
> >Thanks very much. Jack Williamson