Eye-Magic 4000 Scanners

[Lasernerd]

Who uses these scanners?
I have a rebuilt set, new magnets etc.
wow these are very fast!
I swapped out the mirrors and installed the broadband Dielectric type
much smaller dimensions of mirrors
These things are getting close to 50K!!

cons.
Very loud
wierd shape of scanners
scanners are very long

[Skyko]

I have a set of EMS 4000 scanners that I bought a couple of years ago for a project that got put on hold indefinately. Have they changed them recently or would it be possible that mine will do 40k to 50k also? They have only been used for a total of 30 minutes or so for some testing (but not speed tests) when I first got them.

Any good way to measure the response without a ILDA test pattern setup? (thinking of a function generator set to output a sine wave or something here?)

I would be interested in selling them if they are in good working order as I don't think I will ever get around to using them.

[Lasernerd]

I have a set of EMS 4000 scanners that I bought a couple of years ago for a project that got put on hold indefinately. Have they changed them recently or would it be possible that mine will do 40k to 50k also? They have only been used for a total of 30 minutes or so for some testing (but not speed tests) when I first got them.

Any good way to measure the response without a ILDA test pattern setup? (thinking of a function generator set to output a sine wave or something here?)

I would be interested in selling them if they are in good working order as I don't think I will ever get around to using them.

It might be possible you have the old magnets,,
They had a coating that delaminates,
It was a 300$ upgrade to the revised magnets,

I would advise you keep them.They are very fast and accurate
and spendy 1600$
yep they should do 40K and very wide scan angles 50 deg.

[Skyko]

So two questions:

Is there any way to tell which type magnets are used in mine?


Back to the idea of the function generator test. I can probably figure this out, but at what frequency sine wave would the galvos start to distort if they will do 40k ILDA test pattern? I was never really sure what exactly 40k meant...40,000 points I guess, but that isn't really very descriptive.

[fuzcub]

Given that your set is a few years old, and the warrentty is no longer valid, you can gently wedge a blade into the seam that holds the cover onto the base to crack the glue join. Then slide the cover off the scanner, in the direction of the slot around the 10P IDC connector. once the cover is off, you can see the magnet .
The old style magnet was coated with silvery (nickel?) plating that was prone to flakeing and jamming . The new magnets are coated with teflon, which is a mild grey colour.
The newer scanners also have a spring loaded bearing that replaced the sinterlyte ones.

Barney.

[Skyko]

How about a less destructive way?

Say, serial number comparison?

My EMS 4000 are serial number 003421 and 003427

any ideas on what rev those might be?

[Lasernerd]

mine 003685-003688
and they both needed the revisions

[Skyko]

darn. I hate paying more for something that I have never even used yet. Can't you just scrape off the nickel coating on the magnets?

[fuzcub]

How about a less destructive way?

Popping the lid off the scanner isn't destructive - just wholesomely educational.
Sometimes you can slide it off without the assistance of a blade . Just make sure that you add some glue when you reassemble it - otherwise it can slip off during transport.

The coating on the magnet protects it from moisture, the magnet can go spongey after a while if the coating is removed .
To see if the coating is beginning to flake, *gentley* twist the mirror,(power off!), and it should jump (click) from one endstop to the other , if it feels gritty,or stops midway then the coating is flaking.


Barney.

[Skyko]

Well, Steve just informed me that his serial numbers, which are higher than mine, had the old style magnets

The company should have really just done a recall. If you make a shabby product with that big of a defect it is kind of BS to then charge the buyer another $300 to fix it. I don't think I would ever buy an EyeMagic product again.

The magnet coating probably isn't flaking on these yet as they have only been run for a total of 15 to 30 minutes, and even that was not continuous. They have never even gotten warm. Unless the coating is so bad that it just flakes over time.

I am just going to list them in the for sale section here and let someone else get some use out of them until they need new magnets.

Thanks