Help with JAMMA cab

[nutts]

[ukvac] Help with JAMMA cab
Hi

I have an old but sturdy Silverline JAMMA cab, with a rotatable
monitor (by lifting out the monitor through the front of the cab,
turning it onto its side, and replacing it).

I want to replace the monitor, and I happen to have a new WG monitor
that I bought for my Defender, but no longer need for that purpose, so
I thought I'd swap them around. Problem is, the new one doesn't fit -
the triangular metal chassis is too big to fit into the space.

My joinery skills aren't too bad, so one fine weekend I'm thinking I
might wheel it outside for some minor surgery to fit the new monitor,
but also while I'm there, I wonder how easy it would be to build in a
method for easy rotation of the monitor, without back pain-inducing
lifting each time. I've never seen a 'proper' cab with rotating
monitor, though, so I've no idea where to start.

Has anyone done either of these things with such a cab? Would they
recommend I just buy a new cab with the rotation facility already
there?

Cheers,
andy

 

[P-Man]

RE: [ukvac] Help with JAMMA cab
There were some cabs made in Europe, (Holland I think?) that had
motorized rotating monitors.. havn't seen one in the flesh, but seen
pics of them.

There is a jamma cab make, can't remember the name tho, that has a
circularmonitor mount, you remove the screen glass, undo a screw and
twist the fram round, and put the screw back in to hold it in its next
orientation. Pretty nifty, I had one once, but for the life of me can't
remember the name of the cab... but don't some later Goliaths do this?

Once upon a time I had devised a circuit that would actuate a motor and
stop/start in the right places to do just this, automatically, all it
would require is to make the circular monitor mount suspended on
bearings so that it 'twists' with great ease.. this way, a motor could
be hooked up to spin it either way attatched to either a gear, or
pulley-system.. You would still need a stepper motor with high torque to
drag it round. I looked into electric motor gearboxes off the shelf
that'd work. Then you'd have to think of a latching system to latch it
in place, I didn't do that bit tho, my best guess was to make the
rotating of the monitor an equally weighted motion, therefore it
wouldn't want to spin back round and settle in another position... I did
the electronics side with simple ttl and microswitches at
'end-of-travel' positions, and a simple one button press for each
orientation..

But like a lot of projects, its shelved for a rainy day, and since I've
not owned a jamma cabinet for about 5 years (until about a month ago)
I've not had the need either hehe...

But there's some ideas, if you wanted to do the legwork, I could
probably write a schematic for the circuit to control it, but you'd have
to spec everything hardware wise and do a lot of testing..

Or find one of those crazy euro cabs

Andy Welburn
www.andys-arcade.com

>

 

[guddler]

Re: [ukvac] Help with JAMMA cab
BAS jamma cabs have the round wooden plate that you just spin round.

On most, the bolts are long gone too so it's even easier

Just find some new ones before you move the cab too far.

On 17/06/05, Andy Welburn <warlords@punkass.com> wrote:
> There were some cabs made in Europe, (Holland I think?) that had
> motorized rotating monitors.. havn't seen one in the flesh, but seen
> pics of them.
>
> There is a jamma cab make, can't remember the name tho, that has a
> circularmonitor mount, you remove the screen glass, undo a screw and
> twist the fram round, and put the screw back in to hold it in its next
> orientation. Pretty nifty, I had one once, but for the life of me can't
> remember the name of the cab... but don't some later Goliaths do this?
>
> Once upon a time I had devised a circuit that would actuate a motor and
> stop/start in the right places to do just this, automatically, all it
> would require is to make the circular monitor mount suspended on
> bearings so that it 'twists' with great ease.. this way, a motor could
> be hooked up to spin it either way attatched to either a gear, or
> pulley-system.. You would still need a stepper motor with high torque to
> drag it round. I looked into electric motor gearboxes off the shelf
> that'd work. Then you'd have to think of a latching system to latch it
> in place, I didn't do that bit tho, my best guess was to make the
> rotating of the monitor an equally weighted motion, therefore it
> wouldn't want to spin back round and settle in another position... I did
> the electronics side with simple ttl and microswitches at
> 'end-of-travel' positions, and a simple one button press for each
> orientation..
>
> But like a lot of projects, its shelved for a rainy day, and since I've
> not owned a jamma cabinet for about 5 years (until about a month ago)
> I've not had the need either hehe...
>
> But there's some ideas, if you wanted to do the legwork, I could
> probably write a schematic for the circuit to control it, but you'd have
> to spec everything hardware wise and do a lot of testing..
>
> Or find one of those crazy euro cabs
>
> Andy Welburn
> www.andys-arcade.com
>
>
> >

 

[Steve Clark]

Re: [ukvac] Help with JAMMA cab
one of the cabs here, a videomaster, has a wooden frame that comes
forward just
enough to allow the monitor to be rotated. If any pictures would help,
just let
me know.

Steve

> BAS jamma cabs have the round wooden plate that you just spin round.
>
> On most, the bolts are long gone too so it's even easier
>
> Just find some new ones before you move the cab too far.

 

[John Bennett]

Re: [ukvac] Help with JAMMA cab
The Taito Egret cabinet has a circular wheel - you undo the bolts, turn the
whole thing and you're done.

TJ




DATA Imported from archives: originally posted by TJ (tony@djhalo.com)

 

[andrewhannay]

RE: [ukvac] Help with JAMMA cab
You might have already checked for this and I might be stating the obvious,
but make sure the diagonal of the monitor is less than the width of the cab
before you start. ;-)
I think there are a few MAME projects out there that have rotating monitor
cabs, but I can't see any point in having it motorised unless you are
building a MAME cab.
Andrew

 

[nutts]

Re: [ukvac] Help with JAMMA cab
Thanks for the comments guys. Andy - might be a bit ambitious for me,
it'd be great to see if you ever build it though! Andrew, good point -
it was the lack of diagonal awareness that made me fail in the simple
swapout in the first place

Steve, I'd really appreciate a couple of pics if you could spare the time.

Nice one all
andy

On 6/17/05, Andrew Hannay <andrew.hannay@candc.co.uk> wrote:
> You might have already checked for this and I might be stating the obvious,
> but make sure the diagonal of the monitor is less than the width of the cab
> before you start. ;-)
> I think there are a few MAME projects out there that have rotating monitor
> cabs, but I can't see any point in having it motorised unless you are
> building a MAME cab.
> Andrew
>

 

[Steve Clark]

Re: [ukvac] Help with JAMMA cab
Quoting Nutts <gnutts@gmail.com>:

> Thanks for the comments guys. Andy - might be a bit ambitious for me,
> it'd be great to see if you ever build it though! Andrew, good point -
> it was the lack of diagonal awareness that made me fail in the simple
> swapout in the first place
>
> Steve, I'd really appreciate a couple of pics if you could spare the time.

I'll try to sort out a few snaps in the next couple of days...

Steve

 

[Steve Clark]

Re: [ukvac] Help with JAMMA cab
For anyone who's interested, here are a few pics of a videomaster cab's
rotatable monitor.

http://www.clarkweb.co.uk/monitorpics/monitorpics.zip

Hope these are helpful.

Steve

Quoting Steve Clark <ukvac@clarkweb.co.uk>:

> Quoting Nutts <gnutts@gmail.com>:
>
>> Thanks for the comments guys. Andy - might be a bit ambitious for me,
>> it'd be great to see if you ever build it though! Andrew, good point -
>> it was the lack of diagonal awareness that made me fail in the simple
>> swapout in the first place
>>
>> Steve, I'd really appreciate a couple of pics if you could spare the time.
>
> I'll try to sort out a few snaps in the next couple of days...
>
> Steve
>
>