Miniature tuning fork choppers

EOPC has introduced a new range of miniature tuning fork choppers with integrated drive electronics, which are suitable for high volume, dedicated application, long life systems and portable instruments.

The low cost choppers fit emerging trends of building smaller, portable and handheld inexpensive systems. Tuning fork choppers are used in industrial, scientific, medical and military applications worldwide.

The product features an integrated driver, making it simple to use, with no wiring and no adjustments require. It features a TTL monitor output (reference signal), low power electronics and an aperture up to 5mm.

It offers one fixed frequency to 3kHz, and is small in size and lightweight. It is able to withstand shock and vibration, and its rugged design has no wearing parts, making it maintenance free.

The excellent frequency stability of the tuning fork chopper is due to very high 'Q' of the tuning fork (Q=>5000). This high 'Q' will provide short-term stability in frequency of 1-3 PPM if the temperature is constant.

To minimise the temperature effect on the frequency, the tuning forks are made of a special alloy (constant modulus alloy). This nickel-chromium-titanium-iron alloy has a thermoelastic coefficient (TEC) defined as the algebraic sum of the thermal coefficient of modulus of elasticity and the thermal coefficient of expansion about +/- 10 PPM/0F, which is 15 times better than regular steel.

There is no jitter associated with the imperfections of slots in disk type choppers or motor bearings noise.