Medialas Megascan i50

[ledfreak3d]

The Specs :

Model Number: Megascan i50
Scan Angle: +/-70 Degrees
Deflection angle:
Scan speed:up to 30,000pps with 5x10mm mirror
Input:Analog +/-5V
Power:+/- 24VDC to +/-30VDC @ 1.2A
Mirror aperture: max. 70° optical
3.5mm, optional 4.5mm
Mirror size:5x11mm
Mirror Type: Coated Aluminum
Mirror Reflectivity: >98%

Whats included in the box :
2 x Scanners
1 x MicroDriver board
2 x Scanner mount
2 x Cables driver to scanner
2 x Cables driver to PSU/input signals
Also a nice clean short user manual was provided.

These Galvo’s where shipped with the standard 5x11 mirrors.
Just slightly smaller than on the Laserworld scanners.
According to the manual these should be able to reach 30kpps at 8 degrees scan angle.

First impressions Drivers:



The first thing u notice when u remove the driver from the box.
Is that both drivers are very small and mounted on a decent size heat sink.
These drivers have a high quality look and feel about them.
Good quality parts and connectors are used on these drivers.
And the heatsink is more then able to handle the heat produced by the drivers.



Another very good thing about these drivers.
Are the connectors.
These are able to lock the cable into place on the driver.
But can also be easily remove again without the need of a screwdriver.
This makes installation and removal of the driver a breeze.
An other closeup of the connector locked in place




Both drivers have there on fuse onboard to protect them against over current.
These scanners allowe for easy tuning details about this are provided in the manual.
These drivers are also able to drive the high-end CT68XX CT62XX

http://www.medialas.de/data/microamp_english.pdf

First impressions Galvo’s:




Can’t really say a lot about these.
The look like your generic style galvo’s
The do have a other type of connector on them.
Then what is normally found on galvo’s
Both galvo’s are properly labeled for x and y axis.
And the mirrors are fitted on the galvo’s axel without any glue.



These galvo’s are outfitted with the standard 5x11 mirrors
The mirrors have a high efficiently of 98 %.
This was also specified in the manual.
But this was also measured using my coherent laser check and
Using my 100 mw 532 nm Cni test laser I’ve only lost about 5-6 mw of power after all the mirrors.
So that’s pretty good.
The mirrors fitted to these galvo’s are broadband mirrors.
These are coated for a range of between 400 nm -700 nm.
So any visible light laser should work fine with these mirrors with minor losses.




The mounting block:

Or should I say mounting stands.
These stands are simular to whats found on the widemove scanners.
The have a stirdy and heavy feel to them and the slide togerther easely.
Mounting can be done via de center hole and the slot on the end of the stands.
The allow for easy adjustment of the galvo’s and the mounting stands them selves.

Now for the important part

I’ll let the pictures do all the talking.
In most of the pictures u will see the ilda pattern.
Since this is still seen as one of the industries standard test frames for turning scanners.
But I’ll try to keep u awake with some other frames and movies to

Movie :

http://www.youtube.com/watch?v=6gtXQxqURDY

Pics :

8 Degrees @ 30 kpps



15 Degrees @ 15 kpps



8 Degrees30kpps

Stil very nice clean lines no round edges et etc
The image tilt is not causes by the scanners but is because of the door I’m projecting on !!



At 30k 8 Degrees



8 degrees 30 kpps



at 30k 8 Degrees



These scanners perform very well at all speeds and scan angles.
There are no obvious over or undershoots in the scanned output.
Frankly I’ve not seen such clean lines and alignment on any of the budget scanners.
This set comes very close to the high end ct scanners when it comes to alignment.
All the lines are perfectly aligned at all speeds and scan angles.
No distortions or over or undershoots are seen when running the scanners on their rated output and scan angles.
A 30kpps the scanners stay at normal room temp.
The driver does become pretty warm 43-50 degrees
But the highest temp I recorded was about 51 degrees.
And this was at 21 degrees room temperature running the amps and galvos for 1 hour
In most cases a new set of scanner might require some fine tuning to get everything looking just fine.
But these where already spot on.
For more info regarding Scanner / Galvo tuning see

http://www.photonlexicon.com/forums/...ead.php?t=3707
And
http://www.laserfx.com/Backstage.Las...Scanning1.html
Both are excellent guide for tuning your scanners and understanding how they actually work.

Conclusion:

So in conclusion.
These scanners seem to do the job perfectly without any problems
The price is 479 Euro’s so with the current exchange rate that’s
645 Us dollars
Or
424 Pounds
And that’s pretty good considering u still have to pay in access of 1200 dollars for a proper ct set.
Scanner performance is as advertised with the 5x11 mirrors installed.
The drivers work great and are easy to mount.
So overall I can recommend this set to anybody.
And it can compete just fine with the other top performers like the dt40 and even Ct

For more info
Please contact.

Dirk Baur
+49 7433 90799-11
Email :dbaur@medialas.com

MediaLas Laser products GmbH
Hoelzlestr. 13
72336 Balingen / Germany
Ph. +49 7433 90799-0
Fax +49 7433 90799-22
www.medialas.com
dbaur@medialas.com

[ledfreak3d]

updated all links should work now hosting provider was down

[JeroenVDV]

What's the max. scan angle you can get, and what's the max speed at that angle?

Still looking for affordable wide scanning scanset..

[ledfreak3d]

Max speed at 70 degrees is not noted in the manual

but ive not tested the ilda patern at 70 degrees but at 40 degrees @ 15k and it stil looked great.
i do have a picture of that someone but could not fit the entire patern on the picture (small room)

[dave]

These drivers don’t have any type of fuse on them to protect them against over current.

LOL, yes they do. Perhaps you need to look at the boards a little closer!

[ledfreak3d]

LOL, yes they do. Perhaps you need to look at the boards a little closer!

yea i already corrected this 2 days ago on lpf

but for some reason it did not save the changes on here

[dave]

Martijn

When are you sending my set of test scanners back? You promised me a tracking number 2 weeks ago.. I'm still waiting buddy boy.

[ledfreak3d]

Hi Dave

its already on its way
i shal send u the tracking number when im back at home.
forgot to send u the tracking number kinda hectic over here at the moment
sorry about that
im currently out of the country

[Pangolin]

Max speed at 70 degrees is not noted in the manual

but ive tested the ilda patern at 70 degrees and 15k and that stil looked great.
i do have a picture of that someone but could not fit the entire patern on the picture (small room)

As a sanity check, could you please let us know the distance that existed between the scanners and the projection surface, and the width of the pattern being scanned across the projection surface?

If you still have the scanners, I would appreciate it if you repeat the test and provide accurate distance and width measurements.

Also, as another sanity check, could you let us know who's software you are using to project the test patterns? It might make a difference...

Best regards,

William Benner

[ledfreak3d]

sorry forgot all about those stats

at 8 degrees

Distance was about 1.5 meters or 59 inches scan size was about 21 cm or 8.24 inches.
i was using mamba black he_laserscan.
yes i know the suck but did not have decent pangolin hardware and software available to me