PT-30 discussion

[nuphotonix]

I have read the threads on the PT-30 galvos. I didnt see any specs on them and also found another set capable of 65k at 5 degrees but will do 38k at 20 degrees for the same price shipped by te-lighting.
anyone know what the specs were on the pt-30.. ther are about $235 shipped to my door.
thanks!

[polishedball]

http://shop.spacelas.com/index.php?m...roducts_id=242

[-bart-]

Rumor has it that they have plain silvered mirrors.
Which have a terrible reflectance at 45 degrees for a 445 nm beam (that is usually polarized). 405nm even worse.

Refractiveindex is your friend.

Not really a big deal, because 445 is the cheapest wavelength so far, but I though I'd mention it.

[nuphotonix]

well well well... the PT-30k Galvos arrived today!! Fast shipping and only $179!!! Cant wait to install them!!! funny thing the istructions are for Spacelas!!! but the printing on the galvos are Phoniex....

[Picasso]

Take pics of the driver please, does it say printed on the board PT40?

[nuphotonix]

Well here is one of the new driver board with heatsink. First thing is that these are MUCH bigger, about a 25mm all around. the power supply is alot more beefier too.


You can (hopfully ) see the Phoniex logo on the pc board..

[Solonar]

I've got the PT-20's and PT-30's, I have not had any problems with the mirrors at low wavelengths.

[DZ]

will do 38k at 20 degrees

I'd be surprised if that's true. What controller are you using and can you test to see if that spec is true? The DT-40Pro's could do 30K at 15 degrees, which is pretty good.

[nuphotonix]

Well it looks that in order to achieve the scan rate I have to swap out the Mirror set. They also included the thin.. and I mean T H I N galvo mirros in order to achieve it. it is easily 2/3'rds thinner that the stock set that came on it. I do get how by lowering the mass of the mirror it can move faster. The power supply is MONSTER compared to the old one.


As far as my controller I am using the Riya DAC with both LSX and Spaghetti

[DZ]

Well it looks that in order to achieve the scan rate I have to swap out the Mirror set. They also included the thin.. and I mean T H I N galvo mirros in order to achieve it. it is easily 2/3'rds thinner that the stock set that came on it.

That's interesting. It's not just a replacement set, it's physically different? I'd be careful swapping out the mirrors for a smaller set, there was some discussion about this a while ago. Even the DT-40's were originally using .6mm mirrors. At the recommendation of pangolin they switched to .8mm mirrors. If I'm not mistaken, the cambridge scanners use either .8mm or 1mm mirrors.

I do get how by lowering the mass of the mirror it can move faster.

Less mass on the shaft means less torque required to move it to the next position. Too thin a mirror and you can have other problems.

The power supply is MONSTER compared to the old one.

The size isn't really as important as the specs, they may both be only capable of an amp or two.

As far as my controller I am using the Riya DAC with both LSX and Spaghetti

It will be interesting to see some photos of the ILDA test pattern at various scan angles to see how these really perform. It's certainly a good price, I just have a hard time believing the specs they quote.