MDS-E/EH Series Instruction Manual
5 Servo Adjustment
300
IB-1501229-F
5.5.2 Vertical Axis Drop Prevention Control
The vertical axis drop prevention control is a function that prevents the vertical axis from dropping due to a delay in
the brake operation when an emergency stop occurs. The no-control time until the brakes activate can be
eliminated by delaying the servo READY OFF state by the time set in the parameters when an emergency stop
occurs.
Always use this function together with deceleration control.
< Setting procedures >
[1] Apply emergency stop while viewing the current position on the NC screen. Adjust the vertical axis drop
prevention time (SV048), and set the 1.5-fold minimum delay time at which the axis does not drop.
When using a motor with a break, confirm that the axis will not drop at the 150ms setting, and set 200ms.
[2] Set the value of the normal acceleration/deceleration time constant plus 100ms for the max. gate off delay time
at emergency stop (SV055), and set the standard setting value of the axis for the deceleration control time
constant at emergency stop (SV056). Refer to "Deceleration Control" for details.
[3] For the axis for which the vertical drop is to be controlled, set the same value as the acceleration/deceleration
time constant for the deceleration control time constant at emergency stop (SV056).
[4] If the vertical axis is MDS-E/EH-V2/V3 (2-axis or 3-axis drive unit), set the servo parameters for the other axis
in the same unit.
SV048 = Same value as adjusted vertical axis SV048
SV055 = Same value as adjusted vertical axis SV055
SV056 = Standard setting value of SV055 for the axis (Refer to "Deceleration control" for details.)
[5] If the power supply unit that supplies PN power to the vertical axis is controlled by a spindle drive unit, set the
time for the spindle to stop from the maximum speed to the parameters SP055 and SP056.
[6] If the power supply unit that supplies PN power to the vertical axis is controlled by a different servo drive unit,
set the servo parameter setting for that axis as well. (Same as item [4] above).
[7] If the CN9 connector of the power supply unit that supplies PN power is connected with the vertical axis, also
set the parameter for the drive unit connected with the CN4 connector of the same power supply unit.
OFF
ON
ON
OFF
ON
OFF
OFF
ON
SV048
Vertical axis drop prevention control sequence
Servo READY (READY)
Emergency stop (EMG)
Motor brake actual operation (BRK)
Motor brake control output
(
MBR)
Summary of Contents for MDS-E
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Page 32: ...1 IB 1501229 F 1 Installation ...
Page 76: ...45 IB 1501229 F 2 Wiring and Connection ...
Page 132: ...101 IB 1501229 F 3 Safety Function ...
Page 142: ...111 IB 1501229 F 4 Setup ...
Page 277: ...MDS E EH Series Instruction Manual 4 Setup 246 IB 1501229 F ...
Page 278: ...247 IB 1501229 F 5 Servo Adjustment ...
Page 351: ...MDS E EH Series Instruction Manual 5 Servo Adjustment 320 IB 1501229 F ...
Page 352: ...321 IB 1501229 F 6 Spindle Adjustment ...
Page 404: ...373 IB 1501229 F 7 Troubleshooting ...
Page 455: ...MDS E EH Series Instruction Manual 7 Troubleshooting 424 IB 1501229 F ...
Page 456: ...425 IB 1501229 F 8 Maintenance ...
Page 475: ...MDS E EH Series Instruction Manual 8 Maintenance 444 IB 1501229 F ...
Page 476: ...445 IB 1501229 F 9 Power Backup System ...
Page 494: ...463 IB 1501229 F 10 Appx 1 Cable and Connector Assembly ...
Page 504: ...473 IB 1501229 F 11 Appx 2 D A Output Specifications for Drive Unit ...
Page 514: ...483 IB 1501229 F 12 Appx 3 Protection Function ...
Page 523: ...MDS E EH Series Instruction Manual 12 Appx 3 Protection Function 492 IB 1501229 F ...
Page 524: ...493 IB 1501229 F 13 Appx 4 Compliance to EC Directives ...
Page 528: ...497 IB 1501229 F 14 Appx 5 EMC Installation Guidelines ...
Page 540: ...509 IB 1501229 F 15 Appx 6 Higher Harmonic Suppression Measure Guidelines ...
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