In a VMC with Fanuc 0i, as operator did not select the right program, spindle tool banged with fixture causing huge damage to spindle and downtime.
We continue training operators to keep feedrate at 0%, check distance to go, reset if distance to go looks alarming, check work offsets & then slowly release feed, still this is not being followed.
Request to suggest any other fool proof way of avoiding this
The operator should have - in large print, in a station near the machine controller :
What program the machine should be running.
What the correct program "O" number should be
Information including whether the program has been proved out or not.
Only ONE person should be assigned to setup/prove out. Once the program has been proved out and is ready to go, NO alterations or changes are to be made unless they are verified.
Accidents due to wrong selection of programs can be prevented by using Custom Macros in CNC Controllers
Please find below an example just of reference & comment or suggest
Supervisor can assign some variable ..we can check with every tool change.. what is program number and variable number.. and make logics..
E.g. Use marco Variable #800
Punch in program number there.
in the program also we have to check after tool change
In Program #100=Program number..
Program number also can be taken from Fanuc Automatically..
This 4115 can be used to get the program number automatically..
#100=#4115 means , in #100 your program number will be stored automatically.
So that we can compare whatever supervisor sets the program number, same program number runs,.. else we can create alarm and stop..
#3000 = 100 (Alarm);
100 is any arbitrary number
you can give any number with macro variable 3000
Whatever alarm text we mention within bracket that will appear on screen
for example .. #3000=100 means Alarm number will be 3100
: if #3000=143(wrong program); means Alarm will be "#3143 wrong program"
Request for comments/suggestions
Thanks for posting this great full informative, i really enjoyed to read this, keep it up