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[macona]

Several different ways to measure using light. You can use an interferometer like I have in this thread, I can measure down to 5nm. This can only measure...

[macona]

Might have something about the tuning of the VFD. You drive does have an autotune feature and if something happened to change the characteristics of the...

[macona]

You wouldn't want that, look at a braking mechanism. electromagnetic, big commercial systems use hydraulic brakes to lock and conical pins at hard index...

[macona]

I had one of the 7x12 lathes that use that headstock and I never had any issues with the plastic gears and I actually did some decently heavy turning...

[macona]

I have a direct drive Yaskawa servo motor I am planning on using to make a 4th from: https://youtu.be/fNexwHbrKbs

I think it will be stiff...

[macona]

Its probably one of these, you can see the cold cathode tube about 3/4 the way thought manual: http://www.goldenengineering.com/wp-content/uploads/2...

[macona]

They can just use small x-ray tubes, they have been around for a while. The tubes are directional and you can use optics to collimate the beam. X-rays...

[macona]

https://www.ebay.com/itm/South-bend-...4AAOSwdD5e8MOZ

Make...

[macona]

Got the renishaw head working tonight. Set up a 29ls32 line receiver and dumped that into one of these: https://www.usdigital.com/products/accessorie...

[macona]

Yeah, very very low power, the most powerful one is 330 microwatts which is below the threshold to cause eye damage. A supermarket scanner has a laser...

[macona]

finally got the thing working. I ended up machining an aluminum block to attach to the side of the detector block I made to hold the HP special 4 pin...

[macona]

Yeah, I understand what you mean by end point now.

So far the running of the signal wires inside of the laser has been an utter disaster....

[macona]

No, you can measure flatness. One way to do it is using angular optics that are attached to a A plate with three feet. For the HP/Agilent system you have...

[macona]

Ignore that, I was thinking of checking for stress in materials using polarizers. You dont use polarizers with optical flats....

[macona]

Oh gosh no, I suck at programming. That is the HP/Agilent software for HP5529A USB box that I am using.

For the renishaw I will be using...

[macona]

Optical flats are used with a light source and a polarizer and then you can see the interference fringes and you can tell whats going on. Ideally the...

[macona]

Oh! And I got a rensishaw interferometer from HGR. Took a bit more work, it powered up but was locking in at about 1/3 the max power you would see while...

[macona]

Got the receiver made for the HP head that I mentioned in the first post. Tool and old HP 10780a receiver and gutted it and took the photodiode and circuit...

[macona]

I have a gyro out of a Mark 12 torpedo from around WWII era. Pretty neat, it has channels in the gimbal that route air to the outside of the gyro mass...

[macona]

Hah, this laser puts out 225 microwatts, you could stare into that beam for days and it wouldn't do anything....