Measuring Principle
The coordinometer of a “tracker” type is composed of a base plate with two slides, controlled by micrometer screws which move in orthogonal direction to each other. Each slide is equipped with a pair of polar extensions; the thread of the pendulum passes between this pair of extensions and in its equilibrium position balances the magnetic field generated by them.
Each displacement of the plumb line causes an imbalance in the magnetic field; this imbalance, by means of suitable electronic circuits, is converted into an impulse for the two step-motors which activate the drive screws of the slides to move and follow the wire until the two magnetic fields balance.
The number of revolutions and fractions of a revolution made by the micrometer screws, are counted by a mechanical counter for local reading and by an absolute encoder for data transmission (one for each coordinate).
The encoder is 10-bit and digitizes the coordinate value in absolute GRAY code.
Protective microswitches for the end of stroke and a heating element to prevent the formation of condensation are also fixed to the base plate.
The whole mechanical assembly which is rigidly fixed to beams or shelves, is protected by a robust stainless steel cover, leaving a window for movement of the plumb line. An umbrella is installed over the plumb line as protection from drips.
All mechanical components are of stainless materials or protected by appropriate galvanised treatments.
As detailed, the coordinometer is provided with electronic circuitry able to detect the thread equilibrium position between the transducers, to drive the servo motors to restore the equilibrium position and transmit in code the data related to the measurements. This group of circuits, known as the electronic servers is enclosed in a specific container and maintained at a constant temperature by a thermostatted heater.
The electronic equipment is realized with solid state components on printed circuits.
On each board are LEDs for signalling the most significant alarms in the system.
There are also accessible bushings and test-points for the control of the most significant voltages of the various groups.
The coordinate values and alarm signals are usually transmitted by:
– a shielded cable with 13 conductors (for each axis) for transmission of data in parallel format,
– a shielded 2-wire cable for the transmission of data in serial format,
– optical fiber (the instrument must be equipped with an appropriate converter)
Technical Specifications
| Sensor |
Coordinometer XY
(cod. PND3101001 |
Coordinometer X
(cod. PND3101002) |
| Range |
100 mm for X coordinate
50 mm for Y coordinate |
100 mm for X coordinate |
| Resolution |
0,02 mm |
0,02 mm |
| Resolution of the mechanical counter |
0,01 mm |
0,01 mm |
| Absolute GRAY Encoder |
10 bit |
10 bit |
| Precision |
0,1 mm |
0,1 mm |
| Operating temperature |
From -20°C to +60°C |
From -20°C to +60°C |
| Power Supply |
24 Vac
Upon Request: 220Vac or 100Vac o 12 Vac
(±10%) |
24 Vac
Upon Request: 220Vac or 100Vac o 12 Vac
(±10%) |
| Absorption |
60 VA without heaters
160 VA with heaters |
60 VA without heaters
160 VA with heaters |
| Output |
Standard: Serialized data in current loop 0/20 mA (in digital form)
Optional: 19 conductor cable with remote data transmission and alarm signals in GRAY code |
Standard: Serialized data in current loop 0/20 mA (in digital form)
Optional: 19 conductor cable with remote data transmission and alarm signals in GRAY code |
Accessories and spare parts
| Support device |
Device manufactured on specific requirements |
Related Products
| EGS-2C Portable Electronic Telependulum |
Removable electronic and optical instrument for manual measurements |
| Base for EGS-2C Telependulum |
Support base for EGS-2C telependulum |
| Optical Coordinometer |
Removable optical instrument for manual readings |
| Pair of tablets for optical coordinometer |
To manufacture the base of the optical coordinometer |
| Control Bench for optical coordinometer |
Bench for the periodic control and the calibration of optical coordinometer |
Technical Assistance
If you have any requests or questions about our instruments or if you have special needs that require different solutions from the standard, please contact us. Our team will provide all the necessary information and will be very happy to work with you to study, develop and customize instruments and solutions suitable for your specific needs.
All information in our datasheet is subject to change without prior notice.
Please check the datasheet/details carefully and contact Pizzi Instruments for further information
