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SlotsNZ

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Posts posted by SlotsNZ


  1. 8 hours ago, slotmadmac said:

    i can only imagine

    The problem young reptile, is that the age gap from you to the “senior members” remains exactly the same as it was 10 years ago.

    The obvious come-back, is that you are in the prime of life, and to enquire periodically as to how our mobility/memory/contenance/arthritis/hip replacement booking/pharmaceutical schedule is working out. :lol:


  2. It isn’t even  “electronics” Greg. It is a basic electrical principle, and the same principle that makes a motor rotate when you apply voltage to it - simply the flip side of the same coin, and it is something that people normally learn their first month choosing motors etc in  club racing.

    I find it hard to conceive that a guy who debates the finer parts of alternative digital systems electronics across the forums is sitting here pleading ignorance on the basic principles of motor braking. 

    And it is not about “not upsetting those who are good with electronics”, it is simply about not writing wrong information that would create confusion for new spotters. 

     


  3.  Mr Flippant, you just did the same thing. Power is not “going back to the motor”.

    for you, Den, anyone else reading this thread, it IS important to understand correctly how this works, or you will not understand how the addition of resistance to the circuit works,  thus reducing the motor generated braking, nor the impact of swapping out one motor for another with a stronger magnetic field/higher torque - and thus stronger braking.

    Den - yes, I’ve come across tracks with a 25 or 50 ohm pot wired into the stations. But I didn’t know some Tassie tracks had that facility.
    when I originally designed my controller stations, I put in a hole in the panels, for a pot to be mounted and offered that as an optional extra…but after a couple of years I only ever sold one set of stations with it…. Ah well. 
    worse, we had a guy in club who sometimes wired his motors wrong way round, so would flip over the DPDT direction reversing switches - and not flip them back when he moved to the next lane :ph34r:

     


  4. That's weird SportsRacer - your controller image has disappeared.

    - So has r377. I spent some time writing a full and definitive reply regarding his issue, [Phil also took some time] and not a bean back since, in 2 1/2 months.

    On 7/4/2021 at 10:55 PM, big den said:

    Hi Shayne,

    The difference is exactly where (or if) the red wire (brake) is installed within the track wiring. When you release the trigger (hopefully) you activate what is known as 'dynamic braking' in which a reverse current is applied to the motor thus slowing it down. If the brake wire isn't installed in the correct position there isn't any dynamic braking and the car will just coast rather than brake. (as was the case at my local track until February this year).

    Den

    Den, what you wrote there is not quite correct. 
    Nothing is "applied" to the motor, the circuit simply becomes a dead short, and so the motor itself attempts to become a generator - into a dead short - thus causing the fixed magnets to resist the rotation of the armature caused by the rolling of the rear wheels moving back through the gear train, which is generating a conflicting magnetic field


  5. 3 hours ago, Sports Racer said:

    We can run a car with MJK's on a lane and it will get good grip. Run one with silicone tyres for 3 min on that lane then run the MJK car again and the lap times will be much slower.

    I know there's no scientific reason but real world testing on several of our tracks show otherwise. 

    The silicone tyres seem to lift the rubber off the track and it sticks to the silicone. The more you clean the rubber residue off the silicone tyres the more they keep cleaning the track until there's no more rubber to lift.

    I have no argument with that,  all that is happening, is that the urethanes are depositing material onto the track surface, which sticks, and aids further urethanes to grip to the "doctored" track surface.

    But the usual charges against silicons

    a ) "laying down a film of silicon that ruined the rubber grip"
    or
    b ) "removing the build-up of rubber" (by making it stick to the tyres)

    Are both untrue.

    In fact, if you used treated soft rubber tyres after the urethanes - the same thing would likely happen.
    If you routinely used treated rubber tyres, then switched to urethanes - a similar thing would happen.

    But if you run a clean track - you can run any combination of tyres that you wish, without the slightest issue of incompatibility between compounds/tyre types.

    BTW - I didn't mention before but

    4 hours ago, Sports Racer said:

    Your NZ tracks are weird - bright colours and silicone resistant.

    Bright coloured tracks ? 
    That comment showed how absolutely little idea you have about the NZ slot scene.
    Having supplied the braid, router bits and timing systems for around 120 tracks in NZ, I feel I have a reasonably good handle on the market and hobby here.

    There was ONE - I repeat WAS just ONE blue track built by Chris Wong in 2009, with a 2 pot gloss surface in a pale blue.
    (and a very nice track it was, factory built at a furniture and caravan company, it raised the bar on track quality.)
    npsr.jpg
    That is the only track I could imagine fits the description of "bright" . Chris' track has been mothballed for several years, as the magnabraid rusted after it was moved to a waterfront location.

    FWIW - I don't know of any clubs running silicon tyres in NZ.
    I sold about 10 packs of Slot.it S1 and S2, and a few packs of indiygrips and max-track the past few years, and about 50 packs of my own urethanes, versus about 25,000-30,000 packs of soft rubbers from the 5 usual suspects. NSR, Sideways Slot.it, Policar and ScaleAuto


  6. 1 hour ago, Sports Racer said:

    Your NZ tracks are weird - bright colours and silicone resistant.

     

    I have some background in the chemical industry Paul, I went through this a decade ago when it was a hot topic, and utterly destroyed every false premise about silicons

    Just for a start - they are chemically inert and stable. There isn't even any solvent commonly used around slot tracks which can affect or degrade them.
    That is why similar silicon compounds are used as valve seats and seals on the valves of IBC tanks containing aggressive, acids, alkalis and petro-chemical solvent cuts.
    I could tell you stories about the wrong seals being used on IBC tanks and pipe fittings, and the resulting port closures, factory evacuations, but you'd lose interest quite quickly.

    They do not shed any "film", they do not magically spit out a portion of their simple inorganic compound, and anyone who says otherwise is simply acting off false interpretation of what is taking place in their track environment - to their detriment and continued ignorance.
    At the time I was "proving this" I also conducted solvent tests, just as demonstration; so best you leave the subject to those who act out of facts, not myth.

    FWIW - what I HAVE seen, is that tracks which have been rubbered up - especially with tyres using treatments, when the rubber “goo” builds is sticky, IT can stick to other surfaces…. Eg such as silicon tyres - but also to urethanes, steel rollers, plastic tyres etc, but it has nothing to do with silicon per-se, only to to with the way the track has become coated, and what with, from rubber tyre use and -in most cases - form of tyre treatment  

    essentially - a misdiagnosed problem, with a solution which resolved the issue - but not through understanding, merely by removing the perceived cause.

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