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[quote=580072] (1)...The CAM timing is a little harder for me to measure because of the two holes it uses to measure it. I took two 3/32 drill bits (the smooth sides of them) and leveled the bow as best I could, and it seems to be correct. I have not checked Idler wheel lean.(4) Can I do a “walk back tune” to get sites minimally accurate during this break-in process, or should I just wait to make sure everything is settled in? [/quote] Unfortunately the Cam Timing Post in the Technical FAQ forum lost all of the images when the forum was upgraded.
The process of timing the Drenalin cam rotation is to get the holes in the cam to align so that they are parallel to the string, not the bow. Here are several ways to do it: a) mount the bow upside down with a plumb bob fastened to a pin in the highest timing hole. Use a line level to get the string plumb. Check the plumb bob string to see if it passes through the lowest cam timing hole ... if not, adjust cam rotation so that it does. b) here is how I do it with a DIY tool. Fasten two pins and a line level bubble to a short piece of aluminum angle with JB Weld. This is best done with the pins in the cam timing holes and use clothes pins, etc., as clamps to hold the angle in place until the JB Weld sets. Use a line level to level the string.
Adjust the cam rotation so that the DIY Timing Tool's level agrees with the string's level.
As for 'tuning', I wouldn't recommend attempting any tuning until the idler lean is adjusted. To adjust/check idler lean come to full draw and have someone observe how the string tracks off the idler. You can't reliably do this yourself because in the process of looking up it is most likely you will torque the bow and get a false reading ... which brings up the point that bow hand grip/torque will affect idler lean, so a good consistent grip is necessary for accuracy. If you want to set nock height and centershot so that you can have some confidence in shooting the bow before making idler lean adjustments or cam timing, I'd recommend doing a Short Distance Tune. First, check that the arrow rest supports the arrow at the berger hole (rest mount bolt hole) in the full up position. Then set the nock height at 1/8"-3/16" above perpendicular, and set the centershot at 13/16" from the riser (11/16" for most fall away rests), this is just a good initial setting to get started.
Short Distance Tune is an easy, quick method that doesn't require any special equipment and can be done indoors at 12 yards even without paper tuning. The procedure is explained on page 8 of the Easton Arrow Tuning and Maintenance Guide. After cam timing and idler lean adjustment, paper tuning and walkback tuning, then moving on to more advanced tuning methods like Fine/Group Tuning and Broadhead Tuning can be done with confidence and good results.
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