Quick Answer
DRAW LENGTH AFFECTS THE CAM TIMING AND DRAW CYCLE, WHICH IN TURN IMPACTS THE PAPER TUNING AND ARROW REST ADJUSTMENT IN A COMPOUND BOW.
Understanding Draw Length and Cam Timing
When adjusting the draw length of a compound bow, it’s essential to consider its impact on cam timing. As the draw length increases, the cam timing will shift, affecting the bow’s draw cycle. This shift can result in changes to the bow’s overall performance, including its kinetic energy, arrow speed, and accuracy.
Adjusting for Draw Length Changes
To account for changes in draw length, archers can perform paper tuning and walk-back tuning techniques. Paper tuning involves shooting arrows through a target made of paper, and adjusting the bow’s settings to achieve a consistent, straight shot. Walk-back tuning involves adjusting the arrow rest to compensate for changes in cam timing and draw length. A general rule of thumb is to adjust the arrow rest 0.010 to 0.015 inches for every 1/2 inch change in draw length.
Fine-Tuning with Draw Length Adjustments
After making draw length changes, archers should re-tune their bow to optimize its performance. This may involve re-adjusting the cam timing, arrow rest, and other settings to achieve the desired kinetic energy and arrow speed. A well-tuned bow with the correct draw length will provide a smoother draw cycle, improved accuracy, and increased arrow speed. Archers should aim to fine-tune their bow within 1-2% kinetic energy and 5-10 fps arrow speed deviation from the optimal settings.
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