Fagor nc-200 pb Installation Instruction
Page: 22 - Installation Manual - NC-200 PB
2.3.4 BLOCK CHANGE SYNCHRONISM. MODELS A, A1
Description of the diagrams according to positions a, b and c.
There are three ways to synchronize when going from one block to the next at
the end of a bend. If a pressure gage (transducer) is installed, P64.6 = 1, the
editor offers the possibility to program the work pressure on the header page
N0.
the end of a bend. If a pressure gage (transducer) is installed, P64.6 = 1, the
editor offers the possibility to program the work pressure on the header page
N0.
1.
With the transducer connected to input I18 (P64.7=0), this positioning dro
(NC) compares the active pressure with the one programmed and provokes
the block changing sequence.
(NC) compares the active pressure with the one programmed and provokes
the block changing sequence.
2.
If the comparator is external (P64.7=1), this positioning dro (NC) waits for
a signal at I15 that confirms that the programmed pressure has been exceeded
in order to begin the change sequence.
a signal at I15 that confirms that the programmed pressure has been exceeded
in order to begin the change sequence.
In either case:
a.
Output O29 is deactivated (INPOS) in order to prevent the ram from going
down.
down.
It starts the delay "D", bending time, at maximum programmed pressure.
b.
At the end of the bend, output O28 is activated to force the ram to return
automatically and it resets the analog output for pressure.
automatically and it resets the analog output for pressure.
c.
When it reaches the top dead point I13=1, it resets O28 and goes on to the
next block. If PAR65.1=1, it requires a flank at I32 to confirm the contact
of the punch with the sheet.
next block. If PAR65.1=1, it requires a flank at I32 to confirm the contact
of the punch with the sheet.
3.
With pressure sensor signal, P64.6=0, connected to I15 and programmable
delay for RAM UP.
delay for RAM UP.
When the pressure sensor triggers:
a.
It deactivates O29 (INPOS) to prevent the ram from going down.
It activates O28 to force the ram to return automatically. It is affected by
the timer (PAR29 + D). As a precaution, a minimum delay is forced
(PAR29).
the timer (PAR29 + D). As a precaution, a minimum delay is forced
(PAR29).
b.
It resets O28 and it goes on to the next block.
There are three possibilities:
b1
With a "D" value too high, the ram reaches the top dead point, it
activates I13 before the delay is over.
activates I13 before the delay is over.
b2
If D = 0, after the PAR29 delay.
b3
If the delay is over (PAR29 + D), it forces it to go to the next block
without waiting for I13.
without waiting for I13.
In the "b1" and "b2" modes, I13 resets the timer and O28.
If it reaches the top dead point, it goes on to the next block.
If PAR65.1=1, it requires a previous flank at I32.