To measure the volumetric accuracy, a 1,000 mm (39.4 in.) master gauge (cylindrical measuring fixture) is placed vertically on the table and the deviations along the Y-axis <from 0 mm to 1,000 mm (39.4 in.)> are measured at 3 points on the X-axis <0 mm, ±200 mm (±7.9 in.)>. DIXI Machines achieve a positioning error within ±2.50 μm and without using the NC unit's offset functions.
During machine accuracy measurement in which nine φ 20 mm (φ 0.8 in.) holes were bored with a 200 mm (7.9 in.) pitch from the 0° and 180° positions on the B-axis, we achieved machining error within ±4.0 μm for all holes.
We move the Z-axis with a measuring instrument mounted on the top of the table, and measure the positioning accuracy and repeatability at heights H1 and H2.
Table 1 shows how even a small displacement on one axis results in greater deviation as the height increases.
There are errors on each axis, and these combine to give the total 3-dimensional deviation.
DIXI Machines are scraped and checked in accordance with the standard norms ISO 230-2 (Positioning & Repeatability) and ISO 10791-1 (Straightness & Angular Deviation).
This rigorous scraping and inspection process ensures the high precision of DIXI Machines, giving accuracy which is up to