Golf simulator for high-end budget?

[ZMax]

No, this is indoor. Indoor the spin as well as spin axis is measured. Indoor two small metal disc's on the ball are needed to allow the TM to pick up the data. I have checked the spin data from the TM using a other radar system (zelocity) and some how-brew software, The values are correct.

Compared to Zelocity? You've got to be kidding me, right?

As for spin axis, all the material that I could find from Flightscope and TM both say spin axis is calculated from the curvature of the ball flight. I know that metallic dots are put on the balls for the radar to track spin rate when indoors, but none of the material specifically say that spin axis can also be determined from the use of these dots/discs.

Can you point to a document or specs that claim the TM can indeed determine spin axis from the use of metallic dots?

[Frans@france]

Compared to Zelocity? You've got to be kidding me, right?

No You saw my paper about the PureLaunch? You ever saw my software that I wrote for it? I'm not joking if I make statements like that!

As for spin axis, all the material that I could find from Flightscope and TM both say spin axis is calculated from the curvature of the ball flight. I know that metallic dots are put on the balls for the radar to track spin rate when indoors, but none of the material specifically say that spin axis can also be determined from the use of these dots/discs.

You must have been misinformed! None of the two read spin axis information from the curvation! TM reads the spin axis from the sub-radar images and the detail can be found in the patent.

http://trackman.dk/Company/Technology-(1).aspx

Measuring spin rate of sport balls by radar using multiple harmonic spectrum traces US2009/0075744
Measuring spin axis orientation of sport balls from trajectory measurements by radar. US2009/0075744

FS claimed to read the seam of the ball and used that for spin axis. However in Europe there is now a patent infringment claim filled by TM against them http://trackman.dk/Media/News/patent-claim.aspx

Can you point to a document or specs that claim the TM can indeed determine spin axis from the use of metallic dots?

It's even in their newsletter explaining the max ball speed and spin for each indoor ball lfight length.
page 11 http://www.trackman.dk/download/news...ewsletter7.pdf

[ZMax]

No You saw my paper about the PureLaunch? You ever saw my software that I wrote for it? I'm not joking if I make statements like that!

Yes. I've read your paper(clubfitter73). But why not compare the TM to a FS? Your Purelaunch can measure spin as accurate as the TM?

You must have been misinformed! None of the two read spin axis information from the curvation! TM reads the spin axis from the sub-radar images and the detail can be found in the patent.

http://trackman.dk/Company/Technology-(1).aspx


FS claimed to read the seam of the ball and used that for spin axis. However in Europe there is now a patent infringment claim filled by TM against them http://trackman.dk/Media/News/patent-claim.aspx

According to the patent:

Description: Patents: > Comparing a target direction indicated in an image, e.g. by using a camera, with the ball direction determined by radar. (US2009/0295624, EP1763683, CN1981207B, KR7002764/2007, JP2008/504534) > Measuring spin rate of sport balls by radar using multiple harmonic spectrum traces. (US2009/0075744, EP1698380, DE602006009719.0, GB/EP/1698380, CN101384308A, JP2008/538085A and KR10/0947898) > Measuring spin axis orientation of sport balls from trajectory measurements by radar. (US2009/0075744, EP1853362, DE602006015036.9, GB/EP/1853362, CN101384308A, JP2008/538085A and KR10/0947898)

Can you post a passage from the patent that specifically deals with determining spin axis from using metallic dots?

It's even in their newsletter explaining the max ball speed and spin for each indoor ball lfight length.
page 11 http://www.trackman.dk/download/news...ewsletter7.pdf

I've read the newsletter and the section for indoors does not mention spin axis, only total spin rate.

Now using just 10 feet (3 meters) of ball flight, TrackMan is
able to achieve our own industry-leading standard of precision
for measuring spin. This is a major breakthrough for indoor golf
facilities using launch monitors. Unlike other launch monitor
technologies that estimate or simply imply spin rate, TrackMan
has always directly measured spin rate, in addition to club delivery.
Now that TrackMan is able to precisely measure spin rate with a
ball flight distance of just 10 feet (3 meters), facilities with limited
space can now take advantage of our world-class technology.

TrackMan co-founder and CTO Fredrik Tuxen says “Measuring
spin directly and accurately is important for two reasons: first of all,
knowing a golfer’s spin rate is essential when making driver fitting
recommendations. And secondly, if you do not track the ball for
the entire flight, as is the case indoors, the results of a ball flight
model will be significantly impacted by the quality of the spin rate
assumption entered in the model.

[Frans@france]

Yes. I've read your paper(clubfitter73). But why not compare the TM to a FS? Your Purelaunch can measure spin as accurate as the TM?

euh and where can I find a FS ? I don't own one... Besides that using two radar unit at the same time that uses the same bandwith is not possible. The returned radar images from one beam will interfere with the reading of the other unit..

The purelaunch can be used to measure spin within 50-90rpm of the TM. The resolution and the firmware make it a bit difficult but it was doable. I also own a other doppler radar unit but rewriting the Launchpi software for the Zelocity was much faster.

According to the patent:.............

read the this one : DETERMINATION OF SPIN PARAMETERS OF A SPORTS BALL, look at figure 2

http://www.google.com/patents?id=GzG...page&q&f=false

Your right that the newspaper only talks about spin but...if you have the spin data then combined with the information in the patent you can see how it can pickup the axis tilt.