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| Building a Penny Pusher Arcade Game |
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| Noitoen:
On the pwm controller, do you have a free-wheel diode across the motor? I've had experience where the motor would vibrate and the diode corrected it. |
| mattinker:
Sorry about that, I got my wires crossed, I don't know why, I thought that I'd seen something about limit switches on your thread, I've been back over it and I can't see where I mis-led myself! Regards, Matthew --- Quote from: mattinker on August 05, 2013, 10:58:28 AM ---Chris, I thought you might be interested in these :- http://uk.farnell.com/hamlin/59140-010/sensor-magnetic-spst/dp/1839038?Ntt=59140-010 They are magnetic switches, when approached by a magnet, the switch closes, they are very easy to set up when compared with mechanical limit switches. They will switch a relay or light diodes. Given as 10watts at a maximum of 200 volts they are pretty flexible. Regards, Matthew --- End quote --- |
| raynerd:
--- Quote from: awemawson on August 05, 2013, 02:39:37 PM ---Chris, Have you considered the not insignificant weight of a table of pennies or 2p pieces? The frictional load will be quite a bit I suspect as it pushes forwards. The actual movement of the pusher is somewhat less than on your prototype. Don't forget that when the pennies tip over the edge in the commercial machine, a portion of the 'haul' is split off by a divider so the punter only gets about 75% of what falls - the remainder re-circulates. Andrew --- End quote --- Andrew, regarding the weight of the pennies, are you saying that the motor won't cope with it or I'm not sure? I do appreciate a table of pennies will be a significant weight. Regarding the house winnings, all the commercial machines I have seen have the hidden trap at the edges. ALL the coins that fall off the front lip are won by the punter however there is a small slot, normally about 15mm x 70mm along either edge of the machine. Coins that fall into these slots of eaten by the machine. The hidden slot is normally covered by a small flap. |
| raynerd:
--- Quote from: Noitoen on August 05, 2013, 03:10:41 PM ---On the pwm controller, do you have a free-wheel diode across the motor? I've had experience where the motor would vibrate and the diode corrected it. --- End quote --- Not that I know of... :zap: |
| John Rudd:
:Doh: --- Quote from: John Rudd on August 01, 2013, 01:20:04 PM ---Chris, Usually an inductor that is being switched, I.e like your motor, would have a resistor and a capacitor (a snubber network to dampen the ringing) and a hi PIV diode across the motor...... taking the switching frequency to somewhere around 10Khz will eliminate the whine......If you go to Vellemans website and look up their pwm kit,look at the schematic especially around the output stage.That will explain a lot...(hopefully ) --- End quote --- |
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