Transcript
Velox.S VLF 260 non-contact speed & length measurement
FAE S.r.l Via Tertulliano, 41 – 20137 Milano Tel.: +39 02 55187133; Fax : +39 02 55187399 Email:
[email protected]; www.fae.it
®
VLF260 SETS STANDARDS
SPECIFICATIONS
in highly accurate, non-contact speed and length measurement
Speed Range VLF260 0*... 3600 m/min
Being capable to measure speed and length with a typical accuracy better +/-0.05% (1σ;length>5m), VLF260 is the ideal gauge for replacing contact tachometers which tend to measurement errors caused by slippage, chatter or vibration, dirt build-up and day to day wear problems. The most compact and easy to handle in class VLF260 uses proven laser doppler technology. Thus it has no moving parts, is maintenance free and permanently calibrated, resulting in significant time and money savings. RANGE OF APPLICATIONS VLF260 works at almost any moving objects, such as web, coils, tubes, rods, sheets, plates,… and is well suited for a wide range of applications, including continuous online control, cut-to-length control and differential speed measurement of: • Textile, non-woven and leather • Steel, aluminium, metal • Wire, cable and fibre • Plastic, film, foil and tape • Paper and corrugated products • Rubber and synthetic materials • Wood, glass, ceramics
Typical Accuracy +/- 0,05 % (2σ;L>10m/3σ;L>20m) Standoff Distance 110 mm +/- 5 mm (+/- 20 mm) 230 mm +/- 10 mm (+/- 40 mm) Interfaces 1x RS 232 unidirectional (printer) 1x RS 232 bidirectional (PC-COM) I²C-Bus (spec. applications)
Figure 1: Cut-to-length control VLF260 provides length measurement for a precise cutting of web material. The material surface stays untouched, thus slippage, day to day wear problems and measurement traces are avoided.
Outputs analog 0…4 V (programmable) pulse 0.01 … 10.000 per meter open collector 2x pre selection (pre-/end contact) , 1x alarm Degree of Protection Sensor head IP 65 Processing unit IP 44 Dimensions (L x W x H) Sensor head 154x94x39mm Processing unit 180x144x96mm Laser Diode 25 mW, 780 nm (Class 3B) Voltage 110-230 VAC / 50-60 Hz
Figure 2: Resulting length Highly reliable measurement of textile belts to deliver as much material as required and as little as possible without waste.
Units of Measure (Selectable) m, km, inch, ft
BENEFITS • • • • • • • • • •
Direct replacement for tachometers Non-contact measurement Non-marking, no slippage Independent of mat., surface, colour High accuracy and repeatability No parametration necessary Permanently calibrated Control functions included Memory functions included Certified by PTB (national metrology institution Braunschweig, Germany) • Compact package; easy to handle • Usable as portable calibration tool
Optional Accessories • Configuration- & Monitoring and PPS-compatible software • Forward and reverse measurement by IMP module • */Lowest speed measurement by IMP module • Isolated quadrature pulse outputs • Module for short piece measurem. • Longterm memory (50000 files) • Differential speed measurement • Certified PTB version • Customer specific adoptions
► Specifications are subject to change without notice
INVISIBLE LASER RADIATION AVOID DIRECT EXPOSURE TO BEAM INVISIBLE LASER RADIATION WHEN OPEN LASER CLASS 3B WAVELENGTH 780nm CW OUTPUT POWER 25mW EN 60825-1:2001
This unit is a class IIIB laser product and complies with EN608251:2001. Complies with 21 CFR 1040.10 and 1040.11 except for deviations pursuant to Laser Notice No. 50, dated July 26, 2001.
The following safety features required to comply with the Bureau of Radiological Health Class IIB laser requirements are included: Key-operated power switch on controller Laser indicator light on controller and laser Delayed laser startup-laser indicator light on prior to laser radiation Laser beam blocking device Interlock capability for remote shut-off
Bild 3: Differential Speed Feed rate optimization at an inspection machine for highly elastic textiles by means of diff. speed measurement.
FAE S.r.l Via Tertulliano, 41 – 20137 Milano Tel.: +39 02 55187133; Fax : +39 02 55187399 Email:
[email protected]; www.fae.it
Dimensional drawing
Impulse-Processing µSpeed-IMP Æ certified by national metrology institution PTB Æ applied for patent encoder that in most cases is already mounted to the machine). Hereby µSpeedIMP detects the direction as well as start and stop of the material movement (not machine movement). In addition speed below the measurement limit of µSpeed is measured by µSpeed-IMP. As the external encoder is getting continuously calibrated by µSpeed, day to day use problems as well as material and thickness changes won’t affect the measurement. By using this configuration the complete measurement system is long term stable and long term calibrated.
Description µSpeed-IMP provides four functions: a.) direction recognition b.) start and stop detection c.) low speed measurement d.) pulse output By the use of µSpeed-IMP the signals of an external pulse generator device are processed to achieve the functions a, b and c. The pulse generator device can be either a encoder, which is driven by contact wheel or by transporting cylinder, or directly by a electric drive. The pulse output function (d) operates without any other external device and enables µSpeed to send quadrature pulse signals to replace contact tachometers. µSpeed-IMP is certified by the national metrology institution PTB (Germany) and has been applied for patent. For achieving the function a, b and c, two shifted by 90° pulse input signals are necessary, which in general will be provided by a external encoder (contact wheel plus
Connection The fast and easy connection with µSpeedIMP is done by plugging in the included in delivery 9-pole Sub-D cable in the µSpeed TTL I/O. The external encoder has to be connected to the corresponding clamp (channel A/B) of the µSpeed-IMP. See Figure 1. The pulse output signals are at clamp 9, 10, 13 and 14. µSpeed-IMP is designed to be mounted by top hat rail. Similarly the µSpeed-IMP has to be connected to the power supply (carried out by 24V auxiliary supply). The Grounding of the external encoder has to be the same as for the IMP unit (important: similar reference ground). Impulse-Processing µSpeed-IMP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Input Input Output Output Supply Output Output Supply
Impulse A Impulse B n.c. n.c. n.c. n.c. n.c. n.c. Channel /A Channel /B n.c. 24V Channel A Channel B n.c. 0V
Table 1: Connector pin assignment
Encoder
Impulse
A, B 24V=
Spur A
1 2 3 4
Spur B
Dir
Imp
5 6 7 8
µAWS TTL I/O
Spur /B
Gate
Spur /B
Power
TTL I/O
Spur /A
24V=
Spur /A 9 10 11 12
Masse
Spur A
Figure 4: Timing diagram quadrature pulse output
13 14 15 16
Spur B
Features & Translation
Figure 1: Connector pin assignment schema
Channel (Spur) Ground (Masse) Supply (Versorgung)........ 8-24V= µSpeed (µAWS)………… Sensor system Power consumption......... max. 2W Inputs…........................... Imp. A Imp. B TTL I/O Input resistance…….........10kΩ optional 10kΩ Pullup resistance Input - Hi.......................... 3-24V Input - Lo......................... <1.5V Input frequency…............ <10kHz Pulse resolution.............. <4mm/Impuls Scope of delivery............. µSpeed-IMP TTL I/O cable
2,7kΩ
24V
Spur A Spur B 1,5kΩ
Spur /A Spur /B
0V
Figure 2: Input circuit
Parametration of µSpeed Processing unit: 24V 30Ω
Spur A Spur B
30Ω
Spur /A Spur /B 0V
Figure 3: Output circuit
To be set up in the under menu I/O: a.) pulses/m……………... (…) Æ enter four times the number of pulses per meter which µSpeed + IMP should send to the machine control b.) IMP ………………….. on Æ to activate the direction, low speed and gate function of the µSpeed c.) IMP auto…………….. on Æ to activate the auto calibration function d.) IMP line periode..….. (…) Æ enter the number of pulses per meter which the external wheel encoder sends out (standard set up value: 1000imp/m)
TECHNICAL DATA
VLF260 Speed measuring1)
0 ...1800 m/min
Range Measuring distance Depth measuring field Max. depth of field 3)
120 mm (4.72 in.)
Averaging time Accuracy 4) Repeatability 4)
5 ms ... 1 s (factory setting 25 ms: corresponds to a measuring rate of 40/s) 0.05 % (1 sigma) 0.02 %
Meas. dynamic ratio Meas. principle Laser diode
1:500 Laser Doppler 25 mW, 780 nm (class 3B)
Direction recognition Interfaces / connections Inputs
YES (by IMP module) Opto-isolated-inputs: 1 x Direction signal 1 x Gate (Pause: length measurement stops) 1 x Start / Stop 1 x Interlock (remote control of the laser) 1 x Analog output 0 ... 4 V (programmable)
Outputs
1 x Pulse output 0.01 ... 10' 000 pulses/m (programmable) Opto-isolated-outputs: 2 x Pre-selectable stop signals (Stop and Pre Contact) 1 x Hold/Error signal Interfaces Mains connection
2 x RS-232 230 VAC / 50 Hz or 115 VAC / 60 Hz (depends of model used)
Power requirements 20 VA Operating conditions / Miscellaneous Dimensions Measuring unit: 150 x 100 x 40 (5.9 x 3.94 x 1.57 in.) (L x W x H) Weight Type of protection
Processing unit: 180 x 150 x 100 (7.09 x 5.9 x 3.94 in.) Measuring unit: 0.9 kg Measuring unit: IP65
Processing unit: 1.5 kg Processing unit: IP40
1) Measurement starts from 0m/min by the use of the optional IMP module 2) Higher speed measuring range on request 3) Accuracy will be reduced more, the more the systems is operated at the limit of the max. depth of field 4) Accuracy will be achieved at following minimum measured length: : > 5 m
