Coin Mech help needed

[Retro_Russ]

Hi guys
Bought my first arcade machine back in June : Donkey Kong.
I would like the ability to use coins to credit games.
I presume the coin mech is for 100yen coins as i have tried replica US Quarters and they are too big for the slot.
The 100yen coins seem to get success only on 1 coin door but probably once in every 20 attempts?
Can anyone shed any light on the coin mech/type/requirements from the attached photos?

 

[bones]

Unfortunately the business part of this mech is facing away from us. It's similar to the old S1 mechs but I see that the coins 1st port of call is the S10 style cradle which is designed to catch the right diameter coin and then tip it out onto the rundown(diameter and width maybe) to the microswitch. Observe the coins journey to determine if it's getting past the cradle section or dropping out. Sometimes over time these cradles do open up a little meaning the coin drops straight through and into the reject area. This part is the security for the diameter of the coin. The 2nd part of the security on this old mechanical mech is the rundown. In the old S1 mechs this rundown did do both the diameter and width of the coin but you could launch at speed a 2p coin past an old 10ps security checks so maybe why this has a cradle too. As I can't see the other side of the mech I'm not sure what it's achieving but may just be checking the width but could still be diameter too. Normally there's a couple of screws that when loosened slightly you can move the 'ramp' the coin runs down up a bit(coin diameter). There will be a screw also I'd think that moves this detachable plate part away from the main body of the mech(coin width).The ramp is partially on each side if the mech parts and the gap between them adjusts. Thinner coins will drop through into the reject,fatter coins get stuck on entry and when reject is push they drop out into the reject as well. I say detachable because you can slide the 'spring' the bit of metal that's like a cylindrical 'c' shape off by pulling it towards the back off the mech. You can see it's positional guides in the pics. Tricky to set these up, tiny adjustments required but easy once you know how it works. You need to determine exactly where the coin is being rejected to work out what you need to adjust.
I did like this style mech without the cradle because as long as the coin you wanted to 'let through' was able to fit through the slot then you could set the mech accordingly. I adjusted my old style 10p/50p cocktail table mechs to the new 10p and 50p coin though I did have to and a bit of plastic to ensure they activated the micro switch and didn't just slip by without crediting.

 

[bones]

Re read and slightly wrong about the ramp set up duh but forgot about the washer stopper too lol

 

[Retro_Russ]

Unfortunately the business part of this mech is facing away from us. It's similar to the old S1 mechs but I see that the coins 1st port of call is the S10 style cradle which is designed to catch the right diameter coin and then tip it out onto the rundown(diameter and width maybe) to the microswitch. Observe the coins journey to determine if it's getting past the cradle section or dropping out. Sometimes over time these cradles do open up a little meaning the coin drops straight through and into the reject area. This part is the security for the diameter of the coin. The 2nd part of the security on this old mechanical mech is the rundown. In the old S1 mechs this rundown did do both the diameter and width of the coin but you could launch at speed a 2p coin past an old 10ps security checks so maybe why this has a cradle too. As I can't see the other side of the mech I'm not sure what it's achieving but may just be checking the width but could still be diameter too. Normally there's a couple of screws that when loosened slightly you can move the 'ramp' the coin runs down up a bit(coin diameter). There will be a screw also I'd think that moves this detachable plate part away from the main body of the mech(coin width).The ramp is partially on each side if the mech parts and the gap between them adjusts. Thinner coins will drop through into the reject,fatter coins get stuck on entry and when reject is push they drop out into the reject as well. I say detachable because you can slide the 'spring' the bit of metal that's like a cylindrical 'c' shape off by pulling it towards the back off the mech. You can see it's positional guides in the pics. Tricky to set these up, tiny adjustments required but easy once you know how it works. You need to determine exactly where the coin is being rejected to work out what you need to adjust.
I did like this style mech without the cradle because as long as the coin you wanted to 'let through' was able to fit through the slot then you could set the mech accordingly. I adjusted my old style 10p/50p cocktail table mechs to the new 10p and 50p coin though I did have to and a bit of plastic to ensure they activated the micro switch and didn't just slip by without crediting.

Thank you for replying i appreciate it. I will check what i can from the guidance you have given. Cheers