FMS RMGZ400B/600B Force Measuring Roller for Tension Measurement Installation Guide

June 3, 2024
Fms

FMS RMGZ400B/600B Force Measuring Roller for Tension Measurement

This installation manual is also available in German.
Please contact your local FMS representative.

Safety Instructions

All safety related regulations, local codes and instructions that appear in the manual or on equipment must be observed to ensure personal safety and to prevent damage to the equipment connected to it. If equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.
Do not stress the equipment over the specification limits neither during assembly nor operation. To do so can be potentially harmful to persons or equipment in the event of a fault to the equipment.

Description Conditions
a) Danger of health injury or loss of life
Danger
This symbol refers to high risk for persons to get health injury or loss life. It has to be followed strictly.
b) Risk of damage of machines
Caution
This symbol refers to information, that, if ignored, could cause heavy mechanical damage. This warning has to be followed absolutely.
c) Note for proper function

Note
This symbol refers to an important information about proper use. If not followed, malfunction can be the result.

List of Safety Instructions
The Force Measuring Rollers may be stressed over the specification limits neither during assembly nor operation. The unit’s overload protection value may not be exceeded.
The attachment points for the Force Measuring Rollers on the machine frame must be properly designed. The bearings need to be appropriately mounted.
For correct installation and operation, follow the electrical wiring diagram and instructions in this manual.

Product Information

Dimensions

FMS RMGZ400B 600B Force Measuring Roller for Tension
Measurement-1

RMGZ 400B / 600B Product Range

Nominal

Force

| Order code| Dimensions in mm and [in.]| | |
N

[lbf]

| d1| d2| d3| l1| l2| l3
60 [13.5]| RMGZ416B| | | | | |
100 [22]| RMGZ421B|

85

[3.35]|

100

[3.94]|

110

[4.33]|

6.5

[.256]|

4

[.157]|

13

[.512]
200 [45]| RMGZ422B
500 [112]| RMGZ425B| | | | | |
1000 [225]| RMGZ631B| | | | | |
2000 [450]| RMGZ632B| 110 [4.33]| 125 [4.92]| 136 [5.35]| 7.5 [.295]| 5 [.197]| 13.5 [.531]
4000 [900]| RMGZ634B| | | | | |

Options

  • H14 = Right angle connector
  • H16 = Temperature range up to 120°C, [248°F]
  • H31= For vacuum applications

Order Code

Order Code Example:

FMS RMGZ400B 600B Force Measuring Roller for Tension
Measurement-2

Scope of Delivery

  1. Force Measuring Roller; 1 Straight Connector; Pin ø3×5 [0.118“ x 0.197“] Installation Manual

Not included:
Sheave; sensor cable; mounting brackets

Assembly

Assembly Conditions
The Force Measuring Rollers RMGZ 400B and RMGZ 600B are defined as “partly completed machinery” according to the Directives 2006/42/EC, article 2. In order to assure a proper functionality of the parts and guarantee the essential health and safety requirements of operators working with it, the following conditions for the assembly must be met:

Caution
The Measuring Rollers may be stressed over the specification limits neither during assembly nor operation. The unit’s overload protection value may not be exceeded.

Caution
The attachment points for the Force Measuring Rollers on the machine frame must be properly designed. The bearings need to be appropriately mounted.

Caution
For correct installation and operation, follow the electrical wiring diagram and instructions in this manual.

Assembly Preparations
The Force Measuring Rollers RMGZ 400B and RMGZ600B are usually mounted on a mounting bracket which is in turn installed on the machine frame or on the rotating base plate of a stranding machine. The built-in flange on the force measuring roller provides M8 thread holes for easier assembly. If mounting brackets are used, they need to have mounting holes with a spline groove (see drawing Fig. 1, detail A).
Mounting brackets and machine must be prepared for the installation of the force measuring rollers. The corresponding mounting holes must be drilled in the machine frame.

Caution
If the RMGZ 400B/600B Force Measuring Rollers are used as a replacement for their predecessor products RMGZ 400A/600A, the 4mm 0[.157“] position pin must be replaced with the supplied pin ø3×5 [0.118“ x 0.197“].

Mounting the Force Measuring Roller on static Machine
The support surface for the mounting brackets on the machine frame must be meticulously crafted. The brackets are mounted on the machine. The Force Measuring Roller is screwed to the mounting holes of the mounting brackets whereas the spline groove holds the position pin preventing the roller from twisting out of position. Red point and position pin are aligned to each other (see Fig. 1).Their positions depend on the direction of the resulting force. If the force acts in the direction of the red point, the measuring amplifier will show positive measuring values.

Red Point Alignment in a Stranding Machine
In rotating applications (e.g. in stranding machines) the force measuring rollers are mounted such that centrifugal forces are compensated. Using FMS RMGZ sensors this can be achieved by turning the Red Point parallel to the rotation axis and in direction of the positive force component (refer to Fig. 2).

FMS RMGZ400B 600B Force Measuring Roller for Tension
Measurement-3

Caution It is of paramount importance to compensate the centrifugal forces caused by the rotating base plate of the strander. In fast rotating machines already a small deviation in parallelism between rotation axis and Red Point (of e.g. 0.3°) can lead to a zero point error.
The adjustment of the Red Point and hence the quality of the sensor adjustment as described in chapters 3.4 can be tested after offset compensation and calibration. If the reading of an unloaded Force Measuring Roller stays at zero (e.g. 0 N) regardless of the load cell position (e.g. at 12 o’clock or at 6 o’clock position), the red point is correctly aligned.

Electrical Connection

Signals in the Wheatstone-bridgeQ

FMS RMGZ400B 600B Force Measuring Roller for Tension
Measurement-4

Wiring the Force Measuring Roller to the measuring amplifier is achieved by using a 2x2x0.25mm2 [AWG 23] shielded twisted-pair cable. This cable must be installed away from power lines. The connection is done according to Fig.3. The shield needs to be connected only to the measuring amplifier.

Caution
In order to avoid ground loops and hence electrical interferences, the cable shield needs to be connected only to the measuring amplifier. On the force measuring side the shield must stay open.

Signal Assignment on Sensor Cable Connector

FMS RMGZ400B 600B Force Measuring Roller for Tension
Measurement-5

Design and Functionality

The Force Measuring Roller RMGZ 400/600 series are used to measure the tension of individual strands, wires, cables, and similar materials in stranding machines. An application specific sheave can be mounted on the rotating flange. The lifetime lubricated deep groove ball bearing is build-in. The mating parts of the ball bearing form a frictionless gap type seal for the bearing. The force sensor itself, which consists of two rings connected by a measuring body, is situated inside the stationary inner ring.

  1. Functional Description
    A foil type strain gauge mounted in a full Wheatstone -bridge configuration measures the actual tension. Factory set overload protection devices prevent deformation of the measuring web caused by overload. The load must be applied in the middle of the bearing so that no tilting forces can act on the bearing and the measuring body.

Technical Specification

Sensitivity 1.8mV/V ±2%
Tolerance of sensitivity < ±0.2%
Accuracy class ±0.5% (based on F nominal)
Deflection 0.1 mm; [0.004”]
Load rating (bearing) C dynamic RMGZ 400B: 11.8 kN; [2652.7 lbf]

RMGZ 600B: 21.2 kN; [4765.9 lbf]

Speed limit| RMGZ 400B: 8500 rpm RMGZ 600B: 6700 rpm
Temperature coefficient| ±0.1% / 10K
Temperature range| –10…+60°C [14…+140°F]

(Option H16: –10…+120°C [14…248°F])

Overload Protection [x Fn]| 10 times the rated nominal force
Input resistance| 350 Ω
Supply voltage| 1…12 VDC
Protection Class| IP 42
Electrical Connector| 5-pole mini connector
Sensor Material| Stainless steel
Material of Rotating Flange| Aluminium
Weight| RMGZ 400B: 0.75 kg; [1.65 lbs] RMGZ 600B: 0.9 kg; [1.98lbs]

FMS Force Measuring Systems AG
Aspstrasse 6
8154 Oberglatt (Switzerland)
Tel. +41 44 852 80 80 Fax +41 44 850 60 06 info@fms- technology.com www.fms- technology.com

FMS Italy Via Baranzate 67
I-20026 Novate Milanese Tel: +39 02 39487035
Fax: +39 02 39487035
fmsit@fms-technology.com

FMS USA, Inc.
2155 Stonington Ave. Suite

119
Hoffman Estates, IL 60169 USA
Tel. +1 847 519 4400
Fax +1 847 519 4401 fmsusa@fms-technology.com

FMS UK

Highfield, Atch Lench Road
Church Lench Evesham WR11 4UG, Great Britain
Tel. +44 1386 871023
Fax +44 1386 871021 fmsuk@fms-technology.com

References

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