Somebody mention DUCKS?
QUACK
http://finance.yahoo.com/mbview/searchview/?&bn=73a427ba-debe-3e32-8aa2-e1fc7530b7f3&q=smot&in=b&sm=Gen 3 SMOT KITS now available
by smot.poker55 • Mar 10, 2011 1:56 AM Flag
SMOT - Mark III
by Greg Watson
Texts, schemes, and test report by Greg Watson
In all SMOT ramps developed to date, the magnet arrays were built first and then the ramp was adjusted to best suit the arrays magnetic fields. While this approach has worked for many, I believe it is wrong and has been the major source of many SMOT failures for others.
In the development of the SMOT Mk3 single circular ramp, the ramp was designed first and THEN the necessary magnetic field profiles were adjusted to the ramp and the job it was required to do. This approach, which is probably the correct way to go, has resulted in a relative simple to build and adjust circular ramp.
The SMOT Mk2 single circular ramp is formed of flexible N gauge model railway track. The track is secured to a strong and stable circular ramp with a 8mm overall lift and an average length of 521.5mm. The ramp has an inside diameter of 150mm and an outside diameter of 182mm and an average diameter of 166mm. The ramp is 16mm wide, which is the width of the 16mm wide sleepers of the N gauge track. The ramp has a lift of 1.53mm per 100mm of track. This is a very gentle ramp slope in comparison to the SMOT Mk1 & Smot Mk2 ramps. The steel ball is 12.5mm in diameter and is Chrome plated.
Unlike the SMOT Mk1 & SMOT Mk2 ramps where the ramp and the magnet arrays were parallel, the SMOT Mk3 magnet arrays are not. The SMOT Mk3 circular magnetic arrays have a 14mm differential between the bottom and top of the ramp. At the bottom, the centre line of the magnetic arrays are 2mm below the centre line of the steel ball and at the top, the centre line of the magnetic arrays are 4mm above the centre line of the steel ball. The magnetic arrays are not linear and for most of the array length, their centre line is 3mm above the steel ball's centre line. This above position assists the steel ball's rotation as it produces more attractive force on the top of the ball than the bottom. It also greatly reduces noise generating as there is less slip between the ball and the track.
The best results to date have been about 5 minutes of operation before the ball gets stuck at the exit point (either doesn't drop or gets sucked side ways). The average "Rollaround" time is just over 1 minute to date.
The ball will climb the ramp from most starting points (95%) on the circular ramps 521.5mm average length, but I start the "Ball Rolling" by gently pushing the ball off the top of the ramp.
I have built 2 SMOT Mk3 ramps to date. I am continuing the development of the 2nd unit to increase the stability of its operational characteristics and improve it "Rollaround" performance. I have found that exit guides (reducing the exit width to 13mm) help to reduce "Side Sticks", but I am still testing methods to eliminate exit hangs by experimenting with different exit radius curves. The exit is velocity sensitive as most SMOT builders know only too well. The original SMOT Mk3 units had sharp 90 deg top exits and 5mm bottom recovery curves like the SMOT Mk2 ramps.
Just to repeat by earlier statement on my SMOT Mk2 kits.
ALL SMOT Mk2 kit purchasers will receive a SMOT Mk3 single circular ramp at No Extra Charge. When the SMOT Mk3 single circular ramp is stable and easy to manufacture, I will start shipping SMOT Mk3 kits in place of SMOT Mk2 kits
Please send MUNNY asap
Sales of SunPubes seem to be a bit slow at the moment.