Glass Optical or Magnetic scales

I have fitted this type of scale to my WM 16 on X & Y axes, just pick the length to suit your axes; fitting was relatively simple & drilling the cast frame proved easy enough... remember to set your scales level horizontally even though my pics show my Y axis as following the frame contour it is level on the horizontal plane.

**LINK**

see my album... DRO...

George.

Hi George,

These are similar to the DRO's which I first fitted to my mill which lasted about 12 months before they started to fail and give incorrect measurements. As they were past their warranty period, I replaced them with similar units. I did this twice in 3 years. Wasted a lot of money.

Regards, Paul.

Nothing etched on the Sino unless invisible to naked eye and decent lighting. Either way they need to be cleaned or theyre junk.

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So how do you think they work, Jon ?

MichaelG.

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Edit: Here is the conventional wisdom

Edited By Michael Gilligan on 01/06/2015 19:25:29

Gosh, How neat is this.

http://www.machine-dro.co.uk/high-accuracy-magnetic-linear-tape.html

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That's the same product that goes inside the 'normal' magnetic scales. The 10mm profile of the 'normal' scale is a piece of extruded aluminium that this tape slots into for support.

Nick

Does it matter how they work as said junk without a clean.

One particular scale has just started initial symptoms, i'l have a closer look next time.