Among the large number of applications possible with the Taylor Hobson DA400 dual axis autocollimator, and common, is the simultaneous two axis straightness measurement of machine tool slideways.
The new software used with the Taylor Hobson autocollimator offers significant time-savings when carrying out these measurements.
Measurements are automatically entered into the computer for both X and Y directions at each measuring position along the slideway.
Typically a ten metre slide can be checked in just a few minutes - a considerable reduction in the amount of time taken compared with more conventional methods.
With the addition of the Talyvel electronic level, twist or roll can also be measured.
The autocollimator is normally mounted directly onto the machine slideway using a bracket, rigidly bolted to the end of the slide. If this is not possible the autocollimator can be placed directly on the slide.
When small slideways are to be measured and no attachment holes are available, the autocollimator can be mounted on a separate stand or tripod.
A reflector is used in conjunction with the autocollimator, mounted onto a carriage, specifically designed for dual axis measurement.
Up to 90 measuring steps can be taken for straightness checking and all steps must be of equal distance.
The reflector carriage is moved along the slideway in equidistant steps. Any out-of-straightness in either of the two surfaces (side and top of the slide) will cause the carriage to change angle with respect to the autocollimator, and it is these changes which are measured and computed to determine the error in straightness.
Communication between the system and operator on the PC is in simple conversational language, enabling inexperienced personnel to carry out measurements.
Each stage of measurement to be carried out is prompted by the computer display, which also indicates when any error of operation has occurred.
The new software also allows the results to be presented in a variety of graphical and tabular forms and printed in the form of a certificate with a record of any additional measurement/environmental data.
The DA400 dual axis autocollimator is available from Rosebank Engineering.