FAQ

Here are the answers to some frequently asked questions.
If you can’t find the information you want here, please get in touch

/

The light of the stroboscopes of the HELIO-STROB series are significantly improved by extremely short light impulses of constant brightness. Even the smallest parts are depicted pin sharply – without any motion blurs. What is the physical principle?

Rapid, uniformly repetitive movements, such as rotation or vibration, are illuminated by a stroboscope with a flash frequency adapted to the rate and always at the same position. The observer perceives an apparently standing picture.

How can I create a standing image?

  • Highlight the object with the maximum possible frequency / object speed
  • Then continuously reduce the frequency until the object seems to have come to a standstill

How can I get an accurate measurement?

  • Highlight the object with the maximum possible frequency / object speed.
  • Then continuously reduce the frequency until the object seems to have come to a standstill.
  • Now you can read the measured number of revolutions on the display of the stroboscope.

Our recommendation for mobile measuring:

Should you need even more light:

How can I verify my measurements?

  • Double the measured flash frequency.
  • When measuring correctly the section of the object respectively the mark on the object is visible twice.
  • If the object or the marks on the object appear only once, there is an error of measurement. The effective flash frequency is a multiple in whole numbers.

Our tip: With a single keystroke you activate the handy frequency divider and multiplier of the HELIO-STROB micro.

What can I do if the number of revolutions or the frequency is higher than the measurement range of the stroboscope?

You will seldom if ever get into this situation as the ELMED stroboscope offer – depending on the model - a maximum flash frequency of 315 Hz to 2000 Hz (this corresponds to 18900 min-1 to 99000 min-1). Stroboscopes can also measure higher frequencies. However, in this case the mark on the object appears several times.

An external trigger signal can be supplied over the jack “external impulse“. Thus the stroboscope is automatically synchronised with the moving object. The frequency of the signal defines the flash frequency of the stroboscope.
External trigger signals can be generated by i.e. a machine control or an optic or magnetic encoder. The results are pin sharp pictures even under different speeds without manual adjustment of the stroboscope

Can I observe a motion sequence from any angle?

By means of the function “phase shift” you can define or change the observed section respectively the exact  moment within a repetitive motion (rotation, vibration, etc.)

Can I observe the entire motion sequence of a test object?

  • Highlight the object with the maximum possible frequency / object speed.
  • Then continuously reduce the frequency until the object seems to have come to a standstill.
  • Subsequently, increase the flash frequency until the object moves in the desired speed.

How can I invert the rotational direction?

Slowly reduce the flash frequency until the oppositely directed motion adjusts to the desired speed.

Can I use the slow motion function when the flash frequency is externally triggered?

The slow motion function is available (optional) for the HELIO-STROB BETA in standard version. With an external impulse, positive or negative values (=direction of motion) can be adjusted to get the desired slow motion effect. (The range of the so-called beat frequency is between –5 Hz and 5 Hz). The selected value is recorded and is thus retained, even if other device functions are activated or the stroboscope is switched off.

 

 

ELMED Stroboskope

+49 2056 9329-0

Flash haber:

Presentation of the ISOTEST® holiday detectors at NAPEC 2019 from 10 to 13 March in Oran / Algeria

As in previous years, the 9th edition of the NAPEC (North Africa...

(daha)