Washer type load cells |Force Washer load cell

Washer Type Load Cells

Force Washer Cell - FW

FEATURES

Washer type load cells with central hole are used for measuring force applied in their axial direction.

These washers find application for the indication and for the automatic control and feedback of axial thrusts static and dynamic on punching machines, on machine tools, on presses, on power hammers installed directly or, better, through a thrust spherical plane bearing.

MAIN CONSTRUCTIVE PECULIARITIES:

Low profile, compactness, high strength, easiness of installation.
Central hole diameter: large, for standard metric shafts and screws.
Internal sensors and electrical circuits: entirely stuffed by water-repellent and high insulating filler.

TECHNICAL SPECIFICATION

Bootstrap Zebra-Striped Tables

Model	FW
Measuring ranges	0.5tf ~ 10tf
Total error	lesser than ± 0.2% FS.
Sensitivity	2 mV/V, typical.
Temperature effect on zero	lesser than ± 0.1 % FS.
Return to zero from FS	lesser than ± 0.1 % FS.)
Safe load limit	50% over FS
Creep	lesser than ± 0.1 % FS.
Ultimate load limit	2 times FS

DIMENSION TABLE

Bootstrap Zebra-Striped Tables

Capacity	D	A	H	B	C
0.5tf, 1tf	49	10.1	26	34	44
2tf	78	30.1	27.5	57	67
5tf	98	40.1	29	75	79
10tf	116	50.1	31	93	92

DIMENSION DETAILS

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Web Tension - WT
Force Transducers for Measuring the Web / Spindle Tension

FEATURES

Range of measurement: from 100N to 2kN
Accuracy class: 0.5%
Corrosion resistant
Internally generated calibration signal
Orientation of the axis of maximum sensitivity for 35 independently from the position of the fixing holes
Grade of protection: IP65 (DIN 40050)
Integrated protection against overloads.

TECHNICAL SPECIFICATION

Bootstrap Zebra-Striped Tables

Model	WT
Accuracy	0.50%
Nominal full scale load (Ln)	100N...2kN
Nominal output at FSO	2mV/V
Output tolerance at Ln	lesser than ± 1% FSO
Combined errors: Non linearity,Hysteresis, Repeatability	lesser than ± 0.5% FSO
Creep (after 30 min. at Ln)	lesser than ± 0.06% FSO
Zero load out of balance signal	lesser than ± 1% FSO
Thermal drift in compensated range Sensitivity	lesser than ± 0.005% FSO°C
Thermal drift in compensated range Zero	lesser than ± 0.01% FSO°C
Thermal drift in compensated range Calibration	-
Nominal bridge resistance	350 Ohm
Isolation resistance	> 10 G Ohm
Nominal supply voltage	10V
Maximum supply voltage	15 V
Compensated temperature range	-10...+50°C
Maximum temperature range	-20...+60°C
Storage temperature range	-30...+80°C
Permitted static load	100% Ln
Maximum applicable load	300% Ln
Rupture load	> 500% Ln [6 kN max.]
Maximum static lateral load	150% Ln
Maximum elastic deformation at Ln	lesser than 0,5 mm
Grade of protection (DIN40050)	IP65
Electr. connections: Connector	VPT02A10-6PT2
Elastic element Material	Aluminium (100...1kN) Stainless steel (1.5kN - 2 kN)
Case Material	Anodised aluminium (Flange and bearing in AISI 303)

DIMENSION DETAILS

WIRING INFORMATION

CALCULATION OF RESULTANT APPLIED TO CELL

F = Resultant T = Tension in laminate P = Roll weight

The red point on the bearing support identifies the axis of maximum cell sensitivity and therefore the direction that F has to take with respect to the transducer.

Bootstrap Zebra-Striped Tables

HORIZONTAL RESULTANT	VERTICAL RESULTANT	DOWNWARD RESULTANT	UPWARD RESULTANT


This configuration gives the best performance because it does not consider roll weight. It is advised for low tension, to prevent roll weight from representing an excessive fraction of the resultant, with consequent reduction of the usable field. This is the only configuration in which, in the absence of tension T, there is a zero signal of approximately 0 mV/V.	In this configuration, roll weight is completely in the direction of maximum sensitivity of the cell that generates a signal in mV/V positive. This signal should be considered as tare: it will be considered during calibration of the instrument connected to the cell.	In this configuration, roll weight is completely in the direction of maximum sensitivity of the cell that generates a signal in mV/V positive. This signal should be considered as tare: it will be considered during calibration of the instrument connected to the cell.	In this configuration, roll weight is completely in the direction of maximum sensitivity of the cell that generates a signal in mV/V negative. This signal should be considered as tare: it will be considered during calibration of the instrument connected to the cell.