Voest is one of those German diphthongs I can never get right. I haven't a clue what the diaeresis (the two little dots over the "o") does nor can I distort me speaking apparatus to get the correct sounds. I've sung enough German and butchered it to be completely intimidated by correctly pronouncing "Voest." I usually chump and pronounce "Vohst" but as I understand it should be "Veust' with a hint of "r" in it. Maybe a native German speaker will assist.
Denis, mine is like the picture in your link. The DA 210 has had a model change. Mine is the squared off version made from the late "60's. The earlier model had more rounded castings for head and tailstock. Both had fabricated steel pedestals.
Look at the images if you're curious:
http://www.lathes.co.uk/voest/
Import levels expanded
The quirks I was referring to is the glass vial is lapped so the center where the bubble rests is barrel shaped to a specific radius. This has to be tested at several small angles during the lapping process on a sine bar.to ensure the radius is correct and uniform. Cheap levels may not register slope angles accurately or even uniformly over its range.
Buy a good 10 arc second level and you can put it to work immediately, confident of the accuracy of its graduations. Apply it on a job, note the reading, work a little ratio and proportion, make a calculated adjustment and your correction will be accurate to small percents.
A cheap level requires immediate receipt inspection and calibration as to the accuracy of its graduation. The procedure is simple and requires only a set of cheap Jo blocks and a smooth machine table whose "strike" ( a perpendicular to a slope, that, is a level line) is known and marked with a Sharpie or blocked with a heavy parallel.
The level is set on the line and adjusted by the reversal process so the bubble is accurately centered. The graduations are checked by selecting stacks of Jo blocks corresponding to successive multiples of the arc second graduations, setting the level on the line you marked with the blocks tacks at the very ends of the level and testing the level with them - again by the reversal process.
Example: a 15" level frame and a 10 arc second vial. 10 arc seconds on 10" is 0.000485.". First graduation on a 15" level requires 0.000727" difference in block height, second 0.001454" (calculated values, naturally you should round to some practical value) and so on. In a perfect level the graduations on the vial will track the calculated block height. Import levels may not due to errors of the barrel shape. If you wish to use your import level for accurate determinations, you might make up a correction card.noting the actual slope indicated by each graduation.
The barrel shape in the vial may not be a perfect circle. It may be shaped more like a pear than an apple. Therefore your correction card may not show symmetrical readings and you will have to mark your level which end is which.
That is if you use your level to accurately measure small slopes for some reason and need accurate calibration of each graduation. Us simpler folk require only a level that registers 0.0005" slope in 10" predictably enough for us to level and align our machine tools. Proceed according to your requirements and enthusiasms..
Be careful of body heat from your hands as you handle the level. Accuracy is en elusive target if heat input to the apparatus is uncontrolled.
