micrometer

[crayfish74]

hi,

how can I indentify the correct micrometer, only seeing the photos from Ebay, than are attached to newports rail? i need to move from 0.002 mm or 2 microns

do you recomend the newport 423 ? or other number you must suggest?

thanks....

[Craig Gerard]

HERE IS A LINK

The specifications of each micrometer are listed when viewing individual products via the link above.

Depending on which Newport stage you decide to purchase you would most likely be looking for an SM-25 or an SM-50 micrometer.

To make matters more confusing, other brands such as Mitutoyo and Starrett make micrometers compatible with Newport translation stages, but I'm not familiar with their specifications.

The 423 is a good translation stage and will serve you well. It will provide 1" (25mm) of translation and is reasonably easy to adapt for use as a macro rail. It is a ball bearing linear stage; I prefer the cross roller bearing models. An SM-25 or an SM-50 micrometer would be suitable for use with the 423.

http://www.newport.com/423-433-443-Seri ... /info.aspx


Craig

[crayfish74]

thanks


How about the setup newport 423 with the camera?


1) in the base of 423 newport, can I insert directly the camera + 200 mm lens?

2) the base of 423 newport must be coupled to a tripod or wooden table? or it can be free,mean it can be without being glued or nailed to another base?

Cheers,

[Craig Gerard]

1) in the base of 423 newport, can I insert directly the camera + 200 mm lens?

Yes, but this will most likely provide only one point of contact between the camera and stage which may lead to alignment and 'twist' issues. Another possible consideration is overall balance; but that is unlikely if you are working on a flat, level surface.

*If proceeding with this approach it may be necessary to turn the 423 upside down. There are two large 'holes' on top of the 423. A 1/4-20 hex socket head bolt fits through those holes and the thread protrudes on the other side of the stage for attachment to the camera. There is another method of attachment using a headless threaded bolt which would not require turning the 423 upside down but I am reluctant to suggest it at this point in time.

The 1/4-20 threaded holes on the heavy duty Newport stages are at 1" centers. If you have a Metric stage denoted with an 'M' in front of the model number; e.g. M423, the attachment holes will have an M6 thread (not as easy to work with when attaching camera and/or accessories).

2) the base of 423 newport must be coupled to a tripod or wooden table? or it can be free, mean it can be without being glued or nailed to another base?

It could possibly be used in this way on an anti-slip surface (if you have a very steady hand). I've just tried this method on an anti-slip mat (mouse pad) on a level surface, it appears to work rather well. If using a tripod collar physical access to the micrometer would be limited and could be deemed restrictive. The longer SM-50 micrometer would be more suitable if using the stage in this manner. However, it would be preferable to securely mount the stage to a baseplate or attach an Arca Swiss dovetail for use with AS clamps.



Craig