CNC Bender v10-20080226
CHANGES to CNC PROCESSLIST BUILDER
New - With PD Retract Timer - Ensure Clamp is Home Before Post Bend Jog Starts (Logic Change)
The Pressure Die Retract Timer COMDEF command can open the pressure die a small distance and simultaneously send the clamp die home. The command is considered complete when the pressure die has arrived at its timed destination. The next step is often for a Post Bend Jog (which is a bend die clearance move for non split-die benders).
Because our operator station systems are becoming so fast, it is easily possible for the Feed axis to start the Post Bend Jog without the clamp die arriving completely at home. Of course, this may cause a tube-to-die collision. This is a typical process list where this problem can occur:
PressureDieReturnWithTimer_SendClampAndBoostHome = tim2:200, cto:6000 AllBoostReturn = cto:6000 FeedPositive = pos0:50.80000000, vel0:900.00000000, ump0:1, cto:60000
The PressureDieReturnWithTimer_SendClampAndBoostHome command works like this:
- It sends the pressure due out a timed duration
- It also energizes the clamp home
- It also energizes the PD boost home
- When the time expires, the COMDEF is considered complete and hands control to the next COMDEF command in the processlist.
- The clamp and boost will continue moving home until they arrive at the end of the motion.
In this case, the process can be so fast that the FeedPositive command (after AllBoostReturn) may be told to start moving before the clamp die and PD boost cylinder returns home.
To solve the problem, the Processlist Builder inserts the ClampHomeComplete command in the logic like this:
PressureDieReturnWithTimer_SendClampAndBoostHome = tim2:200, cto:6000 ClampHomeComplete = cto:6000 AllBoostReturn = cto:6000 FeedPositive = pos0:50.80000000, vel0:900.00000000, ump0:1, cto:60000
The ClampHomeComplete COMDEF command includes a CIO input object that requires the home input for the clamp to be activated before continuing to the next COMDEF in the process list.
