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Terminator 2 canon issue

Stereojet

Stereojet

Registered
Joined
Aug 1, 2024
Messages
9
Location
Uk
Hi everyone, finally got my T2 pin set up today and there seems to be an issue with the canon, it doesn’t seem to be aligned correctly with the ramp (when it’s at rest) where the ball comes in and the ball gets stuck on the slightly misaligned canon lip. Does anyone know how to fix this issue? I’m a complete noob at pinball fixing. Thanks for your time.

View attachment IMG_9659.mov
 
Under the cannon under the playfield there’s 2 micro switches, one of them needs adjusting/moving slightly. With the playfield raised up move the cannon about top side to see underneath which micro switch it is.
I had the same problem 6 month ago. Ken
 
Yup. Common problem, and easy fix. The cannon will rest when the switch is closed (or open - don't remember which off the top of my head). It's just resting too early. Adjust the switch.

There is a some Philips screws that need loosening and it allows you to move the switch left and right and up and down ever so slightly.

I can get pics tomorrow for you.
 
A second issue I’ve noticed during play is that the ball seem to get stuck at the top of the playfield, kinda just hangs out near the top bumpers or behind the skull, do I need to raise the back feet slightly do you think so that the playfield is at more of an angle?
 
Stereojet said:
A second issue I’ve noticed during play is that the ball seem to get stuck at the top of the playfield, kinda just hangs out near the top bumpers or behind the skull, do I need to raise the back feet slightly do you think so that the playfield is at more of an angle?
Click to expand...
That would probably help - give it a try. You’re looking for 6-7 degrees of pitch measured between the flippers (not on the glass)
 
Dinsdale said:
Yup. Common problem, and easy fix. The cannon will rest when the switch is closed (or open - don't remember which off the top of my head). It's just resting too early. Adjust the switch.

There is a some Philips screws that need loosening and it allows you to move the switch left and right and up and down ever so slightly.

I can get pics tomorrow for you.
Click to expand...
Ok, I adjusted the switch, the canon now goes up to where it’s aligned with the ramp. I went into the menu to test the canon and target. I can get the target ok, but I can’t get it to the “rest” position. I try to calibrate it, but it just goes up and down forever, any idea what I’m doing wrong?

I’m off to bed now, I’ll try again tomorrow.
 
Dinsdale said:
Yup. Common problem, and easy fix. The cannon will rest when the switch is closed (or open - don't remember which off the top of my head). It's just resting too early. Adjust the switch.

There is a some Philips screws that need loosening and it allows you to move the switch left and right and up and down ever so slightly.

I can get pics tomorrow for you.
Click to expand...
Did you have those photos of the correct position of the switch? My gun is just going up and down constantly now…
 
Stereojet said:
Ok, I adjusted the switch, the canon now goes up to where it’s aligned with the ramp. I went into the menu to test the canon and target. I can get the target ok, but I can’t get it to the “rest” position. I try to calibrate it, but it just goes up and down forever, any idea what I’m doing wrong?

I’m off to bed now, I’ll try again tomorrow.
Click to expand...
Sorry, I've had a manic day and only just saw this now. I have set a reminder to do this tomorrow.

Glad you solved the first problem.

My gun calibration also went back and forth forever. I fixed this (if I remember correctly) by looking at a roller switch which is on the motor.

Do the calibration test with your playfield testing vertical (you'll have to peer around it while navigating the menu, annoying).

You'll notice there's a little groove/notch on the gun assembly plate. The switch goes into that notch which makes room for it to close (or open?), and the test is done after so many successfully closures (or openings?)

Interesting to know what the behaviour is when the ball is in the gun during gameplay. I assume it just goes back and forth forever?
 
IMG_2981.webp

This is what mine looks like. The bottom switch is when the gun is at rest. This arm can be bent as needed but I think yours is fine.

The top switch is the position I have it in. Loosen the screws and you can shift the switch up, down, left, and right as necessary.
 
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You could check if those two switches are working or not with the ordinary switch tests, or the specially provided Gun Test; the switch with the long blade closes to show the gun 'Home', the other is usually Closed, unless the arm with roller drops into one of the cut-outs on the motor cam, where it opens to show gun 'Mark'. So normally, the gun when ready for loading has both switches showing Closed. With a ball loaded into the gun, the motor starts, leaving Home, which goes Open. At the Mark position on the way out, the trigger becomes active, limiting the field of fire (malicious punters could want to hit the skull, l/h ramp or the sign on it). At the Mark position on the way back, the gun fires if the ball is still present. On reaching Home again the motor stops. The only time both switches are Open is with the gun at one of the Mark positions.
 
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