Key features VibroDAQ 2

Dynamic one and two-plane balancing of rigid rotors. In-place and stand balancing. Machine technical state evaluating basing on vibration measurements. Innovative digital measurements method with 16-bit resolution. Two independent measurement channels. Laser speed sensor. Temperature measurement in sensor mount place. Operation with full range of vibration sensors: accelerometric, velocity and displacement. Wide interfaces supported: ICP, current loop, voltage level. Grinding wheel balancing directly on the grinder. Measured rotational speed range 0,1Hz - 10kHz. Sampling rate range: 10Hz - 200kHz. Buffer length: max. 32k 16-bit samples per channel. Synchronous and asynchronous spectrum analysis. Correction mass decomposition. Connector for automated stand operation. Status and error LEDs. Power supply directly from USB port, optional external supplier. Fast USB 2.0 interface (High speed, Full speed) for short data transfer times. Multi-language user interface. Durable and esthetic metal case. Carry case for instrument and accessories.

Gallery

General characteristics

VibroDAQ 2 - advanced measurement and diagnostic system - allows one-plane and two-plane balancing as well analysis of vibrations. It offers also in-place balancing (field balancing) without disassembling of the rotor what reduce costs and time of operation. VibroDAQ 2 is fully digital instrument adjust to work with PC computer via USB interface.
Construction if VibroDAQ 2 system is based on FPGA solution and 16-bit A/D converters and allows very high precision measurements. Technical state of the machine may be determined using FFT spectral analysis. Graphically presented results and easy to use software makes balancing process simple and quick.
As far as the balancing procedure is concerned, user has to make two (one-plane balancing) or three (two-plane balancing) very simple measurement steps to get proper result and get precise location and size of correction mass.
Whole measurement process is very simplified, so the user is informed what he has to do online on the computer screen. Apart from it, during balancing process user stays informed about all significant measurement parameters like rotational speed, unbalance, angles etc.
Graphical chart of the vibrations and spectrum analysis view is also available. The software provides many additional features: balance tunning - eliminates errors in placement of correction mass, correction mass division for balancing of propeller fans, balancing of grinding wheels directly on the grinder.

 

One-plane and two-plane balancing:

VibroDAQ allows one and two place inflexible rotor balancing. The differences between these two types of balancing are described in ISO 1940/1-1986 norms. Roughly speaking one plane balancing can be used if the rules is followed b < l / 3, in other cases two plane balancing must used. For one place balancing, VibroDAQ must make two measurements. First measurement in done without control mass and the second measurement with mass added in any place of rotor balancing plane.

Examples of rotors meeting one plane balancing requirements

Examples of rotors for two plane balancing

Two plane balancing is used for rotors, when b < l / 3 condition is not met. The method of two plane balancing is similar to one plane, the difference is only, that 3 measurements must be done by user until VibroDAQ 2 calculates the proper result. The procedure is as follows:

• first measurement: no cotrol mass needed
• second measurement: user put the control mass on plane I
• third measurement: user put the control mass on plane II

In all measurement steps, the user makes the rotor to mormal speed of working and VibroDAQ 2 will be measuring proper rotor parameters.

After making the full measurement cycle VibroDAQ 2 calculates proper balance parameters (Correction mass and angle for both planes) If during balancing procedure unbalance of the rotor is still not satisfactory, the disbalance tunning can be done. In this procedure measurement by measurement the system will be showing the correction mass and angle online, after each time making the rotor working. It allows the user to balance the rotor very accurately.

During balancing process all information and suggestions are displayed on computer screen.

Measurement screens during balancing process

 

In-place and stand balancing

VibroDAQ 2 is universal system which allows balancing in-place and stand balancing as well.
The stand balancing is made on special kind of mechanical stands, especially done for balancing purposes. Balance stands are used in production cycle of different detail like engines, automobile wheels, abrasive wheels, fans and many other parts of different devices.
In-place balancing is made in place of rotor placement during his normal working process. This very accurate way of balancing since it compensates unprecise rotor mounting possibility. So, it eliminates so called technological unbalance, which can be appeared during mounting the rotor in the bearing system. In the case of in-place balancing of abrasive wheels, special kind of balancing head can be used, like it seen on the picture. VibroDAQ includes special kind mathematical procedures to speed up the process.
In-place balancing saves also time and money needed for disassembling rotor and putting it in balancing stand.

 

Synchronous and asynchronous spectrum analysis

VibroDAQ 2 allows synchronous and asynchronous FFT vibration spectrum graph displaying. The difference between synchronous and asynchronous spectrum graph is that the first one is made synchronously to the rotor speed (required laser sensor usage) and second one does not need to have laser sensor, only one vibration sensor has to be used. Synchronous measurement allows to observe vibration harmonics in relation to rotor turns. In the case measured angle values are correct.

 

Correction mass vector decomposition

Correction mass vector dividing is mathematical procedure which divides the correction mass calculated by VibroDAQ 2 on given number of parts. This is very useful, during balancing rotors like fans etc., where the placement of correction mass are limited only for blades of the rotor. The number of rotor blades can be defined in the software, so the user has many possibilities of making comfortable mass placement for him. VibroDAQ 2 can calculate mass placement around heavy point and it can calculate the correction drilling also around light point of rotor.

 

Grinding wheel balancing

VibroDAQ 2 is equipped in mathematical procedure allowing cooperation with so called balancing head. Almost every grinding machine is equipped with balancing head, which allows the user easy in-place or stand balancing procedure making.   In case of grinding machine in-place balancing process should be applied, so as to be able proper accuracy to be achieved. Normally, the grinding wheels should be balanced by wheel manufacturer, but during grinding process the wheel should balanced by user as well, as often as required to archive proper surface smoothness of material.

 

Temperature measurement in sensor mount place

Optionally VibroDAQ 2 may be equipped with a special type of sensors, enabling the control of temperature in the place of vibration measurement. The temperature can be monitored on two channels simultaneously. This allows the identification of bearing failures or other defects in addition to the detection of unbalance.

VibroDAQ 2 suite contains

• VibroDAQ 2 instrument
• Rotation detector
• Two vibration sensors
• CD with software
• USB cable
• Carry case for instrument and accessories

Historical pictures

 

Downloads

Documents
VibroDAQ 2, vibro-diagnostic and balancing system (brochure)   209kB, updated: 2010-04-27 16:05