CLA Connect Open Forum

Topic: Dexter Stacked Dryer Sometimes Does Not Recognize Money 

1.  Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 9 days ago
Hi Everyone,

Been having some minor issues with one of my  stacked Dexter Dryers. Customers will sometimes put in quarters and try to press one of the dryer options but the board won't recognize it. I replaced the coin switch and still having the issue. Next option is to send the board in to be inspected. The only thing is it doesn't happen all the time, its more of a hit or miss. Anyone else experience this?

Thank you all in advance.

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Ben Waker

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2.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 8 days ago
Ben,

You mentioned coin switch. Make sure the switch has free movement all the way back up. If it can't get all the way up, it won't reset. Bend wire to achieve a free and full swing.

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Larry Adamski
Muskegon Laundromat
Spring Lake MI
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3.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 8 days ago
Edited by Paulie B 8 days ago
Ben,

Larry made a good point. Try moving the switch's hair wire with your finger to see if it registers.
It could be out of adjustment. The mounting screws allow the switch to be adjusted for this purpose.

I would also check the entire length of the wires to make sure the terminals are clean and the wires are properly crimped.


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Paulie B
Multiple Mat Owner since 1976
New York City, NY
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4.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 8 days ago
I have also noticed that new switches have a straight wire, and the old ones are bent down at the tip by 10-15*. Bent ones seem to work better so I save the old wires and change them on the new switches.​

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Adam Carson
Owner/Operator
Busy Bubbles LLC
Port Orford, OR
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5.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 8 days ago
Yes, I have replaced the switches and even checked them to make sure they are in place. One of them was loose so I straightened it and seems like its doing the same thing. I called tech support they said it could possibly be the board or the 2 wires that connect to the coin drop. Wanted to see if anyone else had this issue and what their solution was before I send the boards out for repairs.

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Ben Waker

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6.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 8 days ago
Edited by John Miller 8 days ago




7.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 7 days ago
Edited by Paulie B 7 days ago
Ben,

I just re-read your original post. Maybe it's not the coin switch.

When the customer inserts the coin, does the "payment accepted" light blink on?
If no, then it must be the coin switch or it's wires, or the wire connections. Sometimes the switches have 3 spade connections on them. 1 common, 1 normally closed, and 1 normally open. Are you sure you have the wires on the 2 correct spades?

If the payment light does blink on, and the temperature selector buttons don't respond, then I would check the ribbon connector plug that connects the display board to the main computer board. Unplug it and then plug it back it to "wipe" the connections clean.

If it still does it, then try swapping the coin mech with another dryer to see if it is indeed the coin switch. The problem will follow the coin mech to the other dryer if it is.

Finally, you could also try swapping the main board with either a spare, or another dryer. Just the board though, not the whole assembly. If you still have the problem after swapping just the main board, then it's most likely the digital keypad or the display board.

Hope this helps. Let us know what fixes it.



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Paulie B
Multiple Mat Owner since 1976
New York City, NY
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8.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 7 days ago
I have problems with Wascomat TD3030 dryers accepting money.  When lint builds up in the coin drop, one coin may trigger multiple "reads" and give a lot of extra time for free.  Cleaning out the lint solves the problem.  Also, does anyone have a source for repairing the computer boards for these dryers?  Any tips would help.  I now have 6 dryers out of commission due to faulty boards.

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James Radovic
Owner
Jupiter Laundry and Downtown Stuart Laundry
Jupiter and Stuart, FL
CLA Member since 2000
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9.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 6 days ago
Edited by John M 6 days ago
Had the same thing happen today also on a dexter. Installed a new switch, swapped drops and no luck. Even when I manually pulled the wire when it was off the drop. On about the third pull will it register on the display.

I swapped per the entire controller board and did not correct. I'm assuming it must be the wires which I will attack later.

@Paulie B, CLA Member  why only swap the board and not the whole controller?  I would guess it helps isolate the problem but won't swapping the whole controller be quicker and still determine if the issue is somewhere on that controller and can then be drilled down further if needed?  Enlighten me....🤔😜

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John
Store Owner/ Employee
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10.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 6 days ago
John,

Sure, you can just swap the whole controller. That will at least tell you if it's something on the controller or if it's the switch.
I should have said to do that first. If it's not the switch, then he can go ahead and determine if it's the main board or the display board.

BUT!!!! Dexter has (or used to have) A small capacitor that they can give you. It comes mounted to 2 spades that allow you to mount it across the 2 terminals of the coin switch specifically for this issue.
I have used them in the past and they do solve the problem of a switch that has gone a little bad.
Apparently, some switches do not establish a clean click connection to send the required micropulse to the board, and the capacitor sort of boosts the pulse somewhat.

Being the OEM maniac I am though, I always looked at this capacitor thing as a bandaid approach even though it does work.

I prefer to just buy new OEM switches (a generic switch could be yet another cause of this issue).

Due to the low voltage of this connection, the wires AND the switch must be able to send a clean cut pulse to the computer.
So a good test for the OP to do would be to swap the touchy switch with a known good switch from another dryer.

Perhaps this should have been the first test. Sorry for that.

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Paulie B
Multiple Mat Owner since 1976
New York City, NY
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11.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 6 days ago
Paulie B,

No reason to be sorry. I don't have anywhere near the experience as you and others and just wondering if there was a reason behind your first post.  I still go after the most complicated fix first (sometimes) and waste a lot of time in the process.

Just had a dexter dryer that the flame would not come on. Kept testing voltage like dexter recommends in their support video and everything was correct. Couldn't figure it out. Finally swapped the ignighter box and bam....we have flame.  Had I done the box first it would have been 5 minutes vs hours.

Getting better though.

You also explained NC and NO which up until a week ago I had no clue what it meant. I moved my magnetic lock controller and didn't take the best notes when disconnecting the wires. So again, took hours to reassemble.  Still don't completely understand the whole concept behind NC, NO and COM wiring but I know how to find it on the internet.




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John
Store Owner/ Employee
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12.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 6 days ago
John,

COM - power coming into switch.
NC- power going out of switch when button is out.
NO - power going out of switch when button is in.

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Larry Adamski
Muskegon Laundromat
Spring Lake MI
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13.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 6 days ago
Larry

 So NC means normally closed and NO means normally opened. So in the case of an electromagnet, normally close would indicate that  The circuit is closed and no current running through and when, in this case, The timer opens the switch it allows the current to pass through and magnetize the Magnet.   is that how it works?

If so,  what's the point of having NC and NO?

Time to find some YouTube's on electronics.

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John
Store Owner/ Employee
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14.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 6 days ago
John,

A single pole, double throw switch simply means that a single circuit is completed (connected) from the COM to the NC when the switch plunger is OUT and the circuit is completed from the COM to the NO when the switch plunger is IN.

Most switches, such as a common light switch in your home, are single pole, single throw switches.  Such a switch has just a COM and NO.  Flicking this switch to the "ON" position completes the circuit from the COM to the NO thus energizing the light.  The act of flicking the switch to ON energized the Normally Open (normally not energized) terminal of the switch.

A single pole, double throw switch completes a circuit no matter which way the switch is thrown.  Plunger out - the circuit is completed from COM to NC; plunger in - the circuit is completed from COM to NO.  Thus, this kind of switch can provide power to one thing when the plunger is out and to an entirely different thing when the plunger is in.

Turning our attention to a relay (what you referred to as an elctromagnet); these work the same as switches except an electromagnetic coil moves the relay IN or OUT instead of a mechanical action moving a switch plunger IN or OUT.  So a relay is simply a switch that moves by electromagnetic force.  A relay will have 2 wires connected to the magnetic coil to make that work.  These wires often are energized by the timer or machine controller.  When the coil is on, it pulls the relay IN completing the circuit between any COM terminals and any NO terminals on the relay.  When the coil is off, a spring pushes the relay OUT completing the circuit between any COM terminals and any NC terminals on the relay.  Some more complex relays, for example 3 phase motor relays, may have 3 COM terminals and 3 NO terminals and 3 NC terminals opening or closing in unison on top of the relay.  Such a relay would be called a triple pole, double throw relay.

In summary, the point of having NO and NC on a relay is this allows the relay to provide power to one item when the relay is energized and to a different item when the relay is not energized.   For example, some washers use 3 relays to control drive motor function.  One relay might pull IN thus energizing its NO terminals to run the motor in one direction while, at the same instant, shutting off the NC terminals to prevent the motor from trying to run in the opposite direction at the same time.

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Larry Adamski
Muskegon Laundromat
Spring Lake MI
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15.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 4 days ago
@Larry Adamski, CLA Member

Thanks for the explanation. That makes a lot more sense now. Especially the last paragraph example.

actually have two dryers down now with same issue. Next check is the wiring harness.

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John
Store Owner/ Employee
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16.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 6 days ago
Paulie,

When customers insert a quarter the "green light" does not flash so as if it never took in the money. So the customer will add another quarter and again nothing. For some reason other times it will work fine with no issues. It's a hit and a miss. As mentioned, I replaced the coin switch with a new needle and it's doing the same thing. It is 3 dryers in particular that keep having this issue. I tried to switch out the board with another dryer but for some reason the other dryer boards are connected differently from one another and I'm not sure which is what.

Dexter support told me the 2 other areas to look into would be the board or the two wires that connect to the coin switch. I will try to take photos of the connections for some additional input.

Ben.

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Ben Waker

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17.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 6 days ago

Not sure if this is the case but some coin switch - printed circuit board interaction on whatever equipment requires the board to see or not see ground.  That is how the logic within the board deciphers if the switch was made by the coin.  Think about it ... if the common wire to the coin switch does not have a solid enough path to the needed ground wire then a loose connection within that path could cause the problem &/or intermittent problem.  It is possible the techies from Dexter do not thoroughly enough understand the exact interaction & therefore the most direct solution.

There are other things in the world of electronics that also switch on zero or ground so it is good for us to pay attention to that possibility.  It could make multimeter testing a bit trickier ... not to mention the fact that the pulse could be as fast as 50 ms which is 50/thousandths of a second.

I remember a dear friend who passed away used to service the two hand me down from local banks Brandt coin counters that we had bought used to help with sorting & counting of our coins.  He often had in his hand a nifty pulse counter ... anybody like Phu or whoever who invested in one of those & knows thoroughly how to use it?  An idea for a new app for pulse testing for our smart phones ... us coin people are not just waiting but are willing to pay for that type of testing device ...

That friend while he was still young enough ... took a lot of pride in making sure all our region's banks had coin counters in perfect operating order.  It almost seems like he was from a generation who cared about accuracy & not for just relying on the more "fly by night" dark internet susceptible way of processing money!!!



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Michael Walsh www.kingkoin.com
Store Owner/ Employee
King Koin Laundry, Car n Dog Wash
Bismarck ND
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18.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 5 days ago
Edited by Paulie B 5 days ago

It is 3 dryers in particular that keep having this issue. I tried to switch out the board with another dryer but for some reason the other dryer boards are connected differently from one another and I'm not sure which is what.
Ben Waker,  04-15-2018 13:44
Then try swapping the coin mechs with dryers that have no issues. I do suspect that maybe the new switches are not operating up to specs. I've been down that road before where the new parts are defective. That can drive you nuts until you realize it.

Larry, Great tutorial on switches you posted! The Dexter coin switch, like many coin switches I would assume, are NO (Normally Open), until the coin triggers the hair wire on the switch to briefly close it to create a pulse.

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Paulie B
Multiple Mat Owner since 1976
New York City, NY
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19.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 3 days ago
Got a chance to take some photos of the boards on how they are connected. Not sure why but some of them are wired differently. Any input would be appreciated.

Ben.

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Ben Waker

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20.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 3 days ago
Ben,

Are the schematics that are supposed support the same specific part number of these slightly different wire located PCBs the same?  If so be aware that some schematics are more focused on function than actual hookup.  In other words on the schematic ... it may show a common zero volts ground in more than one spot.  That may give you a clue to why the outward appearance of the wiring being different.  It looks like a board that would be very user friendly with with test equipment such as a pulse counter & a good multimeter.

I wonder if electrical noise is the problem.   You might need an oscilloscope for that ... not sure.

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Michael Walsh www.kingkoin.com
Store Owner/ Employee
King Koin Laundry, Car n Dog Wash
Bismarck ND
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21.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 2 days ago
I think you are using the wrong spades on coin switch. The one on top should be on the spade closest to the acceptor.

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Chris Mirisciotta
Store Owner/ Employee
Canon Coin Laundry
Canonsburg PA
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22.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 2 days ago
Agreed.

Coin in drop switch should be innermost and outermost. Middle is not used. Innermost is NO........Hows that Larry


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John
Store Owner/ Employee
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23.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 2 days ago
I am not an expert on computer chip firmware but from the limited learning experience that I have gained with PCB firmware changing in the last year or two ... sometimes code within a program is set up to respond to "any change"  That could potentially make normally open (NO) & normally closed (NC) less relevant.

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Michael Walsh www.kingkoin.com
Store Owner/ Employee
King Koin Laundry, Car n Dog Wash
Bismarck ND
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24.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 2 days ago

On my board this is the way it needs to be configured. Per Dexter, attaching it as shown in picture would result in intermittent coin acceptance.

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John
Store Owner/ Employee
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25.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 2 days ago
Also, These photos are from 3 different dryer boards. All 3 are having issues with sometimes recognizing the credits.

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Ben Waker

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26.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 2 days ago
Ben,

After looking at your photo #8, I suspect that the coin switch may need a little alinement.
It looks like the hair wire is not back far enough in it's resting position which may mean that a dropping coin won't always push the switch far enough for a click.





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Paulie B
Multiple Mat Owner since 1976
New York City, NY
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27.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 2 days ago

I checked a coin switch today. You definitely have the coin switch wrong. You need the other top spade leaving the center open. One is NO. The other is NC.

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Chris Mirisciotta
Store Owner/ Employee
Canon Coin Laundry
Canonsburg PA
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28.  RE: Dexter Stacked Dryer Sometimes Does Not Recognize Money

Posted 8 hours ago
Paulie,

I checked the switch and it seems like it is it normal resting position unless if it's not suppose to be.

Chris,

Can you clarify what you mean by its on wrong? All the other dryers are setup the same way. Again, its only these 3 dryers that are having this issue..

Ben

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Ben Waker

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