Notes For Configuration; Configuration Examples - Dold SAFEMASTER S Betriebsanleitung

Notes for Configuration

Installing the measuring sensors
Cross faults between measuring sensors must be excluded by an appropriate cable installation.
Gear ratio or shaft break monitoring
For certain applications, it may be necessary to set a gear ratio. To this end, the following arrangement of proximity sensors or encoder is required:
It has to be taken into account that the rotational speed to be monitored on encoder or proximity sensor 1 (E1) must always larger than or equal to
the rotational speed to be monitored on proximity sensor 2 (E2). The set speed limits on the display for a set gear ratio always refer to the encoder or
proximity sensor 1 (E1).
In the case that the gear arranged between E1 and E2 has no integer gear ratio, a corresponding adjustment is possible by a modification of the reso-
lution settings for E1/E2 (pulses/rev. or mm).
Gearwheel
Motor Gear
Encoder( ) n
1
ü = x / 1
Transmission ratio
n n Initiator( ) n
1 2
1 ü = n
1
z.B.: n = 1500 rpm ; n = 300 rpm
1 2
n 1500 rpm
ü = = = 5
1
n 300 rpm
2
Input on the display ü = 5:1
This arrangement is also used to detect a shaft break. Taking the gear ratio into account, when the measured signals between sensor on the motor and
sensor on the shaft do not correspond, the device immediately switches to a safe failure condition.

Configuration Examples

Monitored movement: rotational; sensor type: rotationally
Encoder with
512 lines
Gearwheel with
16 tooth
Motor
Initiator E1
(Drop A)
Settings on the display based on the above example:
Case A:
Sensor selection:
Proximity sensor resolution E1: 16 pulses/rev.
Proximity sensor resolution E2: 4 pulses/rev.
Gear ratio:
The speed limits (rpm) to be set refer to the rotational speed on proximity
sensor E1.
Case B:
Sensor selection:
Proximity sensor resolution E1: 4 pulses/rev.
Proximity sensor resolution E2: 4 pulses/rev.
Gear ratio:
The speed limits (rpm) to be set refer to the rotational speed on proximity
sensor E1.
Case C:
Sensor selection:
Encoder resolution:
Proximity sensor resolution E2: 4 pulses/rev.
Gear ratio:
The speed limits (rpm) to be set refer to the rotational speed on the
encoder.
Case D:
Sensor selection:
Encoder resolution:
Gear ratio:
The speed limits (rpm) to be set refer to the rotational speed on the
encoder.
Shaft
Gearwheel
Initiator( ) n
2
/ n = x / 1
2
M10287
Initiator E1
(Drop B)
Slide
Gearwheel with
Gear
4 tooth
50:1
1mm
Initiator E2
Initiator E2 (Drop F)
(Drop A, B, C, E)
E1+E2
50:1
E1+E2
1:1 (as measuring is on the same location)
Encoder+E2
512 pulses/rev.
50:1
Encoder
512 pulses/rev.
Not relevant as only one sensor is
selected.
Case E: Monitoring of the cradle for 3m/min, for example
Sensor selection:
Encoder resolution:
Proximity sensor resolution E2: 4 pulses/rev.
Gear ratio:
Spindle with
thread pitch 10mm/U
The rotational speed limits (rpm) to be set refer to the rotational speed
on the encoder. Therefore, to monitor the cradle as shown, at first the
translational movement has to be converted in a corresponding rotational
movement. This is done as follows:
M10288
Rotational
monitoring limit
Case F: Monitoring of the cradle for 3m/min, for example
Sensor selection:
Encoder resolution:
Proximity sensor resolution E2: 10 pulses/rev. (1 mm/pulse)
Gear ratio:
The rotational speed limits (rpm) to be set refer to the rotational speed
on the encoder. Therefore, to monitor the cradle as shown, at first the
translational movement has to be converted in a corresponding rotational
movement. The resolution of the proximity sensor E2 has to be calculated
too. This is done as follows:
Rotational
prox. sens resolution E2
Rotational
monitoring limit
26
Encoder+E2
512 pulses/rev.
50:1
Translational monitoring limit x gear ratio
=
Pitch
3 m/min x 50
=
10 mm/U
Encoder+E2
512 pulses/rev.
50:1
Pitch
=
Translational proximity sensor resolution E2
10 mm/U
=
1 mm/Imp.
Translational monitoring limit x gear ratio
=
Pitch
3 m/min x 50
=
10 mm/U
= 15000 U/min
= 10 Imp./U
= 15000 U/min
UH 5947 / 10.01.17 en / 813