Why to use our System?
The high precise Emirates-Green Measuring System reach the high accuracy throughout three measuring spindles which are operating simultaneously together in order to obtain the stop point at which the measurement is taken. Due to a good vibration, generated by the ratchet, transmitted via spindles to the measurement probes, accrues the greatest possible accuracy for repeating measurement, independently of the user's sense of touch.
The plastic coating protects against spray water, dirt and thermal expansion. The temperature-compensated design enables highly accurate measurements even if the standard ambient temperature of 20°C is not achieved, since the material expansions of the workpiece and the measuring instrument are almost completely balanced out.
On top our system is Maintenance-free!
Cost Reduction
A single Microtest Internal Micrometer may be slightly more expensive than a conventional product, but it can reduce costs by up to 50% in a short time. Depending upon the size of instrument, one Micrometer can replace between 2 and 8 conventional devices.
Furthermore, only a small number of adjustment rings are required. Regular calibration and certification costs are reduced to a fraction of what they were before. Microtest internal micrometers are helping to optimize quality standards in a radical manner. Temperature and readout errors are eliminated, and thus expensive wastage is avoided. Additional advantages for you are a functionality that is constant and reliable, a universality of application, and maintenance of a high level of accuracy over a long period of time.
Technical Comparison
The Microtest Spindle Measuring System is the first which succeeded in combining a high accuracy of measurement with a multiple measuring range. These two qualities were incompatible so far. The three point internal micrometers currently used are based on cone or similar shaped cone-system. Those systems are very limited in measuring range and / or accuracy. A measuring spindle which is positioned at the top of the instrument brings a longitudinal movement via the shaft to the cone which pushes out the measuring probes.
Mechanical Wear
The measurement female thread on the probe exhibits only a minimal wear that is distributed linearly over the whole domain, since the thread flanks are supported over a large surface area. After 1000 measurements at the same location: Low levels of wear linear over the entire range, but almost undetectable. Automatic linear compensation at every routine adjustment!
Cone systems: The measuring probes touch the cone by a line which wears quickly, which only applies locally and non-linear. This problem is often not taken into account in the calibration procedure, since calibration rings are usually only present at the end of the measuring range. This can lead to significant inaccuracies.
Compensation impossible!
Thermal Influence
The Microtest system exhibits proportional, linear behavior. Temperature expansion errors are to a large extent compensated out. In the case of measurements not taken at the standard temperature of 20°C the results achieved are thus approximately of equal accuracy to those taken in the measurement room. In spite of having a design that is to a large extent temperature-independent our measurement unit is insulated at all points of contact with the user, in order to exclude any undesirable heat transfer from the user's hands.
Conventional cone systems behave in an undefined and uncontrolled manner. The behavior is dependent on the expansion at the time of the measurement of the connecting elements between cone and measurement spindle. Usually no protection against heat transfer from the user's hands is provided.
Our Centring System
The contact-longline of the probes provides optimal three dimensional centring. The hard ratchet at the scale head creates a vibration that is transmitted to the probe/spindle system. This allows the device to be quickly and correctly centred. Because a constant measuring pressure is developed, the manual "sense" for measurement is not needed. This provides a repetition accuracy of ± 1µm, regardless of who is measuring. (up to Ø 400)
Although the clutch coupling does permit constant measuring pressure, it does not support centring; it makes tilting in the hole. The scatter is approx. ± 3 – 5 µm. The ratchet permits a better centring, but has certain problems of ist own, since repeated ratcheting causes the cone to penetrate too far into the probe system, thus distorting the results and also causes the scatter.
