Re: Harrison fanuc alphacam

Jon Elson wrote:

> a 2% chance of a digit being miskeyed or not pressed hard enough.

This is a real danger, especially with membrane keypads. Used to run a
Wells Index CNC w/Bosch control. While typing in a program I entered T10
and didn't notice it failed to pick up the 0. When I got to that part of
the program, and with tool 1 being approx 1/2" shorter than tool 10, it
promptly ran a 1/2" rougher end mill 1/4" deep into the hardened vise
jaw at 3000 rpm.
Friction milling works on hard materials, but it's real rough on the
cutters...<G> This is the type of event that causes half the shop to
come investigate.

After that, I quickly learned to moniter the display peripherally. I
mentally spelled my way through every command I entered as I pressed
each key to prevent typo's. As long as I saw -something- happen in the
screen, I knew I was OK.

Jon