Differences

This shows you the differences between two versions of the page.

--- fuss:arcade [2020/03/01 10:34] – office
+++ fuss:arcade [2022/04/19 08:28] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
-====== Allan Universal/Comparable Coin Slot Mechanism Not Accepting Coins ======
+====== Allan Universal/Comparable Coin Slot Mechanism (JY 133A) ======
-The Allan coin slot mechanism is an arcade coin slot mechanism that allows the device to be programmed by adding a sample coin to be matched against to the mechanism. The device will then compare inserted coins with the sample and accept or reject them depending on whether the new coin matches the sample.
+The Allan JY133A is an induction-based coin acceptor. It features an adaptive mechanism that allows the owner to use a coin as a template for detecting coin insertion. From a usability perspective, the coin acceptor is easy to operate and requires that the owner lift a latch and slide a coin inside to be used as a template for accepting coins.
-{{fuss:fuss_arcade_fixing_coin_slot_mechanism.png?512}}
+{{fuss:fuss_arcade_fixing_coin_slot_mechanism_jy_133a.png?512}}
-It may happen that the device does not accept coins anymore, in which case, the matching precision of the device can be decreased by turning the small screw at the back of the device counter-clockwise till the device accepts the coin type.
+The coin acceptor has three switches on the back and a potentiometer marked ''VR'' on the back.
-It seems that Allan comparable coin slot mechanisms are susceptible to heat: the more an aracde cabinet stays on, the more likely that the coin slot mechanism will not accept coins anymore and will need to be adjusted for a lower sensitivity (or place frozen raw meat on the coin acceptor).
+The potentiometer marked ''VR'' can be slid counter-clockwise to make the accuracy of detecting coins less permissive, respectively clockwise to make the detection of coins more strict. In case coins are inserted and the JY 133A displays an intermittently flashing LED and returns the coin, then the ''VR'' knob should be slid clockwise till the coin acceptor displays no error. Conversely, if other coins of different sizes seem to be accepted, then the ''VR'' knob should be slid counter-clockwise.
+^ Switches ^ Description ^
+| ''SW1''  | Unknown (manual mentions PC with revolving lamp?) |
+| ''SW2''  | [[/fuss/arcade#coin_acceptor_coin_signal|Coin signal period]]. |
+| ''SW3''  | Unknown. |
+====== Coin Acceptor Coin Signal======
+Taking as an example the JY 133A coin acceptor, the second switch marked ''SW2'' on the plastic bevel allows the user to specify the signal length (time) that the coin acceptor will generate when a coin is inserted.
+{{fuss:fuss_arcade_fixing_coin_slot_mechanism_switch_sw2.png?512}}
+The switch on the JY 133A is a SPTR switch with three positions corresponding to:
+    * $20ms$ (fast),
+    * $50ms$ (medium),
+    * $100ms$ (slow)
+the descriptions in the manual (if any) mentions some descriptions such as "suitable for amusement machine" for the $100ms$ setting but does not explain what the setting is for.
+Imagine an ideal signal plotted in time:
+<code>
+v ^               T
+  |            .......
+  |            .     .
+  |-----+      +-----+      +-----+
+  |     |      |     |      |
+  |     |      |     |      |
++-----+------+-----+------+-----> t
+  |                  .      .
+  |                  ........
+  |                     T
+</code>
+where:
+  * $v$ is the amplitude, binary in this display with a maximum value of $1$ and a minimum value of $0$,
+  * $T$ is the period of the signal or the length,
+Switch ''SW2'' on the JY 133A allows the user to pick the length of the signal generated whenever a coin is inserted. If you load up any game on the arcade, enter the service menu and then pick the input test you can observe the different settings of ''SW2'':
+{{fuss:fuss_arcade_service_menu_inpot_test.png}}
+Inserting a coin should show the ''0'' next to the ''COIN'' label turn into a ''1'' and then turn back into a ''0''. The time it takes for the number ''1'' to be displayed is exactly the value of $T$.
+In other words, if some games do not seem to accept a coin even though the coin acceptor does not display an error, the switch ''SW2'' should be switched to a position with a larger period $T$.
+It might be that the "suitable for amusement machine" description for the $100ms$ setting is that some arcade games might interpret a longer period $T$ as having inserted more than one coin such that the creator of the coin acceptor labeled the setting as "amusement" as in to not be used in production.