Gun talk - Sega Type-II IR Gun setup

Main > Lightguns

<< < (16/19) > >>

twistedsymphony:
So I got new hardware and disassembled both guns again to clean and grease them. The red gun was missing the tape on the shielding so I pulled it back and snapped a photo:

looks like I was wrong, there are a couple of chips under their.

I also pulled the plastic cap off the tip for a better pic of the sensor:

the sensor is a lot larger than the hole in the cover which is interesting. but we get a better look at it.

Howard_Casto:
That looks like 4 photo sensors to me. Averaging out the values of the 4 would give you the relative position. I suppose it's a bit more complicated than that though.

twistedsymphony:
Over the weekend I made up the extended harness for the LED emitters
over 250ft of wire and 120 crimps... my fingers hurt.

I also found that there's a dip-switch on the Gun I/O board labeled "29 <-> 50" I suspected that this inverts the X-Axis... and it does. most likely referring to the 29" monitor in the mirror cabs and the 50" monitor in the deluxe rear-projection cabs. hence why the 29 setting inverts the X-Axis (0,0 top right) while the 50 setting does not (0,0 top left)

Posted a video of Terminator 2:
https://www.instagram.com/p/BCEqJG2zGIV

Played around with calibration a bit. I found that most games simply have you center the gun but don't do any calibration for edge detection. Which means in these games that the gun will be centered properly but then be off the more you aim toward the edges of the screen the further off the calibration is. so far the only way I found to compensate for this is to tweak the saturation value in the MAME.ini. 0.83 seems to work pretty well I'm suspecting because the sensors sit further out from the screen so technically the visible area is only 83% of the tracking area.

I suspect this will cause problems when I move up to a wide-screen setup since I'll need some way to adjust the saturation of the X and Y axis independently.... I'm still thinking for some games it might be best to translate the "analog stick" data as a mouse pointer.

twistedsymphony:
More info... So I noticed some Time Crisis 4 equipment was up for sale on eBay...

Weird that all of these parts are clearly the same exact design but they're all also completely different PCBs.

LED board is nearly trace for trace identical but the silkscren is different.

Sensor is the same but uses a smaller connector which allows for a more narrow board

Gun I/O is probably identical to one of the later Sega models but most interesting is that it has the URL for the manufacturer ;D
http://www.ohmic.co.jp
and an email?: ohmic@ff.iij4u.or.jp

found it on their website: http://ohmic.co.jp/cat/zahyou-01.html

And if you though Happ's prices on the Sega equipment was high... don't even bother looking to see what they charge for these parts

jbserra:
Following this thread for a full read through later :-)

I have Lethal Enforcers 3 with mirrored CRTs and this gun technology, but was missing the optics board for P2 and found all replacement parts to be ridiculously expensive. Had planned to pull P1 and put into a smaller cabinet, but will need some of this information for the conversion.

I have the OMZ-2D LED from the previous post in mine.

Navigation

 Message Index

Go to full version