15
L531
2,
1
675D
.0/
10.
10
Construction and function
Rim cover for outer and
middle tube (a5, a7)
The purpose of the rim covers for the outer and middle tubes is to protect the tubes and
to prevent the ingress of foreign matter, and they must not be removed under any cir-
cumstance.
The application is fastened on the final plate. The push tube (
) must also be attached
permanently with a fastening screw (opening for the fastening screw visible on position
❙
TFG 1..:
The TFG 1.. can supply external devices with power with the
mains cable
feed through
option.
❙
TFG 5.., TFG 9..:
Optionally, the mains supply and the connection for the operating
element are located on the final plate.
Guide tube unit
The guide tube unit is made up of the outer tube (
), the middle tube (
) and the inner
), and its purpose is to carry centric and excentric loads.
Drive unit
The permanent magnet motor is a 24 V DC motor that drives the lead screw via the
worm gear. The speed of the thrust depends on the load.
Worm gear
The worm gear drives the lead screw. It is driven via the permanent magnet motor.
Thermo-switch
❙
TFG 1..:
Thermal overload must be prevented by the control unit, as the TFG 1..
does not have a thermo-switch.
❙
TFG 5.., TFG 9..:
The thermo-switch in the control unit controls thermal and elec-
trical overload and switches off the permanent magnet motor in an emergency. The pil-
lar can not be operated again until the drive temperature has fallen below the switching
threshold.
Switching off in case of
overcurrent
❙
TFG 1..:
It must be ensured that the control unit will switch off in case of overcur-
rent, as the TFG 1.. does not have this switch-off facility integrated.
❙
TFG 5.., TFG 9..:
The control unit has a switch-off facility in the case of overcurrent
integrated which protects the pillar from overload.
Brake
The brake is attached to the lead screw, its purpose is to decelerate the lead screw and
to prevent a return movement.
Options and accessories
Options
Options can be recognized from the type designation on the type plate.
Pulse generator
With the Hall sensor, the
pulse generator
picks up impulses from a magnetic disk located
on the lead screw. The pulse generator is mainly required for the synchronous running
of several pillars. Suitable control units are available from SKF Actuation System.
Mains cable feed
through
With the integrated mains cable feed through, external electrical appliances (e. g.
microscopes, table lamps etc.) can be powered. With this option, the TFG hides mains
cables which power the elements at both sides of the application.
