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 sends the pressure due out a timed duration then issues a constant energized clamp and PD boost outputs to home. In this case, the process is so fast that the FeedPositive command may be start moving before the clamp die returns home. (This is more likely to happen when the PD Boost slide is already home because PD Boost is switched off.)
To solve the problem, the PLBuilder 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
