Trouble with Operation Wolf Recoil

jaafaman

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Having a spot of trouble getting an OW Uzi's recoil going. I have continuity, and the motor runs fine connected to a 12V source. The game voltage triggers, but it only gives about 7V, which won't even power the motor anywhere near as well as 12V did - and it just barely run then.

Anyone know what voltage is supposed to be supplied to the gun motor? It's certainly not readily apparent from staring at the schematics, which just list "M+" and "M-". Any hints would also be appreciated...
 
i have an op wolf, im sure i could help, but its going to be awhile before i can spend time taking it apart to pin out voltages for ya. Make sure the mechanism is good and lubed with some thin grease that helps also. Ive found sil-glide brake lubricant works great. Makes a mess, but works great! no lube or too thick of a lube will slow it awy down as well. Neither of my op wolfs( used to have another one) have a super fast recoil, as long as its not one recoil per 2 seconds, may juat be the way it is i dont know.


Might want to check into the wiring from the gun down to the rest of the cab, notorious for rubbing through wires. ALso theres a seperate power supply board for the gun, iirc. make sure theres no cold solder on the header pins of it..
 
I've already cleaned off all of the old axle grease and caked-up WD40 and what-not, then used Lubri-Plate (have old bingos, too). Hooked the lines straight to a 12V supply and everything works smoothly, so there shouldn't be a problem with operation.

Although I haven't visually inspected the harness, I do get "proper" signals up to and from the gun, save for the 7V. I did check the aux pwr supply, and it's getting the 13V and outputting as it should.

It seems as though everything should be working - it just doesn't...
 
FWIW, the schematics are a bit hard to follow, but it looks to me like the gun uses the regular 12V of the switcher; not the unregulated 13V off of the aux PS.

Also, the PCB provides not the supply voltage, but a ground path. And it looks like there are two different "speeds" selectable by the game "MOTOR1" which passes the ground path thru a 5ohm resistor, and "MOTOR2" which is straight to ground.
 
I've already checked the 5-ohm and the two SCRs in that path, and initially tried disconnecting the aux pwr supply board to see if the power originated from there (that's why I knew its voltages were good).

The only thing it seemed to affect was the sound though.

Also, as I'm only getting 7V to the gun, I at first thought it may be a weak power supply, so I tried a new one. Now I think that perhaps the lower voltage may be an "M1" trip judging by DarrenF's post...
 
It looks like the slow speed is for regular shooting, and the fast speed is for the free shot power-up. I had not really paid attention to that before, but I just verified it today.
 
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