Bosch Rexroth CytroMotion, Руководство по эксплуатации

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Self-contained axis
Modes of operation
Bosch Rexroth AG RE62290-B, 05.22
1)
- = 2/2 directional seat valve not energized
2)
- = 2/2 directional seat valve energized
Basic position
●
The motor is off / de-energized and all valves are without current.
●
The pressure medium is blocked by the 2/2 directional seat valves.
Extend force traverse
●
Motor direction of rotation clockwise, the motor speed according to the
speed requirement on the cylinder.
●
The 2/2 directional seat valves VA and VB are switched/energized.
●
The pressure medium is conveyed from the rod side of the cylinder B via the
2/2 directional seat valves VB and VA into the piston sides of the cylinder A.
●
The additional differential volume is “sucked” out of the compensator via a
check valve.
●
The cylinder extends.
Extending reduced-force rapid traverse (regenerative mode)
Only possible with version “R”.
●
Motor direction of rotation clockwise, the motor speed according to the
speed requirement on the cylinder.
●
The 2/2 directional seat valves VA and VR are switched/energized.
●
The pressure medium is conveyed by the pump via the 2/2 directional seat
valve VA into the piston side A of the cylinder.
●
The displacement additionally conveys the pressure medium from the rod
side B via the 2/2 directional seat valve VR into the piston side A.
●
The additional differential volume is “sucked” out of the compensator via a
check valve.
●
This enables the travel velocity to be nearly doubled compared to the “exten-
sion of the force traverse”.
●
As a result of the area ratios of the differential cylinder, the force generated
by pressure is reduced by about half. (For gear ratio, see the
⮫
data sheet of
the self-contained axis).
●
The cylinder extends in a reduced-force rapid traverse.
Retraction
●
Motor direction of rotation counterclockwise, the motor speed according to
the speed requirement on the cylinder.
●
The 2/2 directional seat valves VA, VB and VE are switched/energized.
●
The pressure medium is conveyed from the piston side of the cylinder A via
the 2/2 directional seat valves VA and VB into the rod sides of the cylinder B.
●
The differential volume from the piston side A is conveyed via the valve VE
into the compensator.
●
The cylinder retracts.
Hold force generated by pressure
●
The motor is off / de-energized.
●
The 2/2 directional seat valve VB is switched/energized.
●
Thus, the pressure in the rod side of the cylinder B is maintained by the
pump via the 2/2 directional seat valve VB.
Hold traction force
●
The motor is off / de-energized.
●
The 2/2 directional seat valve VA is switched.
●
Thus, the pressure in the piston side of the cylinder A is maintained by the
pump via the 2/2 directional seat valve VA.