Syncing cams, setting drawlength, setting letoff and determing exact point of rollover to deliver most mechanical advantage (reflected as speed).
There's way more to this than you realize. As you add twists to a cable you add more degrees of rotation, thus more draw length. This has to be corrected with the string and the limb pre-load (A to A) can't change as that would increase or decrease draw weight. Of course if you increase draw weight or poundage you will gain speed. We're looking for the perfect sweet spot in the cam. I talked with Michael last night and he spent 8 1/2 hours doing this to his personal bow. With the right tools this time can be greatly decreased. This is why I personally recommend the E.L.P. press designed by Larry Asford who is a PSE Pro Staffer. It has a built in timing machine (vertical drawboard). This is a tremendous help, to be able to use the same machine to press my bow and adjust strings and cables and checking drawlength and synching cams and setting the drawstop. I don't pay any attention to the numbers on the scale on the adjustable drawstop as once the cams are properly synched and the bow is timed for optimum rollover then I simply use a digital scale to determine draw stop setting if I'm looking for less than 80% letoff or a direct measurement if I'm looking for maximum letoff which may not always be exactly 80%. It may be 77% or 78% or whatever. It is the setting which yields the highest letoff and longest valley. Now that I've said all that, do you know how or more importantly do you have the tools. You'll need a press, drawboard of some sort, chrono & digital scale as a minimum to do this right.
There's way more to this than you realize. As you add twists to a cable you add more degrees of rotation, thus more draw length. This has to be corrected with the string and the limb pre-load (A to A) can't change as that would increase or decrease draw weight. Of course if you increase draw weight or poundage you will gain speed. We're looking for the perfect sweet spot in the cam. I talked with Michael last night and he spent 8 1/2 hours doing this to his personal bow. With the right tools this time can be greatly decreased. This is why I personally recommend the E.L.P. press designed by Larry Asford who is a PSE Pro Staffer. It has a built in timing machine (vertical drawboard). This is a tremendous help, to be able to use the same machine to press my bow and adjust strings and cables and checking drawlength and synching cams and setting the drawstop. I don't pay any attention to the numbers on the scale on the adjustable drawstop as once the cams are properly synched and the bow is timed for optimum rollover then I simply use a digital scale to determine draw stop setting if I'm looking for less than 80% letoff or a direct measurement if I'm looking for maximum letoff which may not always be exactly 80%. It may be 77% or 78% or whatever. It is the setting which yields the highest letoff and longest valley. Now that I've said all that, do you know how or more importantly do you have the tools. You'll need a press, drawboard of some sort, chrono & digital scale as a minimum to do this right.
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