Re: [CAD_CAM_EDM_DRO] Re: How to convert a Grizzly 1006 Mill to CNC

At 07:02 AM 10/21/2007, you wrote:

> >Given a controlled spindle, touching with power off is pretty simple.
>
>What do you mean by that? (remember I am a newbie)

The spindle is the thing that holds and turns the cutting tool. If a
cutting tool (say a mill) is running, attempting to touch it to a
block to determine its "Z" axis offset will either damage the tool,
the block or both. If the spindle is not rotating, the damage is
MUCH less likely. Let's assume a mill as an option. You have a
solid carbide block insulated from the machine with a resistor to +5
. When the mill touches the block, the logic level goes low. If the
insulation is slightly resilient, the movement will prevent tool or
block damage. Now try to do the same thing with a really sharp tool
turning really fast.

>And big thanks for the tip about the usb-card

You are entirely welcome. We are all trying to help each other.


David G. LeVine
Nashua, NH 03060