TOS SUA 125 NUMERIC, Operating Instructions Manual

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SUA 125 NUMERIC
34200003 TOS a.s. 02/2011
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2.4. Conception version of safety devices of the SUA 125 NUMERIC lathe with
numerical control system according to EU Standards.
The main dangerous working space is:
-working area with rotating spindle, with moving components for chucking of workpiece e.g.chuck or face-plate and things
moving with carriage tool and workpiece.
Safety requirements and measures .
Risk limitation of construction is carried out in accordance with EN 292-2 , article 3 and protective devices are in
accordance with EN 292-2, article 4.
Control system in general.
It complies with EN 292-2, article 3 subarticles 3.7 and 3.10 and further articles from 5.1.1 to
5.1.10.
Safety and reliability of control system
Includes everything from starting of an actuator and a position sensor in the place of input to final driving device,
electric motor.
From the standpoint of safety the control system ensures:
-starting and repeated starting
-operating stop
-spindle rotation (including rotation with limited speed)
-emergency stop
-blocking
-blocking with locking of protective shields
-feeds (including limited feed rates)
-no arresting actuators (they must be pushed down continuously)
-workpiece chucking
Control system is of the 3rd category in accordance with EN 954, article 7.2.
Position of actuators .
The main contol devices for starting,operating stop and selection of lathe modes and no arresting actuators, are placed in the
operating point near the movable protective shields and actuators and they are in accordance with EN 894-1-2-3.
Starting
See EN 60204-1, articles 9.2.5.2.
The function of starting actuator is controled by mode selection (see paragraph“Change-over switch for mode selection“).
Safety functional protection is reached by block arrangement (see paragraph“Production mode“and “Adjusting mode“).
Closing of movable protective shields does not result in automatic repeated start of movable components.
When the protecive shields are open an unexpected start of dangerous motions of spindle or face-plate, workpiece and tool
are prevented in accordance with EN 1037.
Operating stop
The operating stop is set for ensuring the operating mode. Power supply to el.motors for drive in single
coordinate axes controled by CNC system (category 2 in accordance with the article 9.2 from EN 60204) is not
disconnected if the operating stop is activated, because there is a separated power control of working
spindle.The lathe stop is reached after control acting in dependence on workpiece mass and activity mode of CNC system. If
the lathe is stopped by operating stop, the opening of protective shields keeps the lathe stop in category 2 (see EN 60204,
the article 9.2).
It is posible to repeat start in the operating mode only if the protective shields are closed.