Quick Answer
Adjust the cam timing on your compound bow when you notice inconsistent arrow flight, inconsistent paper tunnel widths during paper tuning, or excessive arrow deflection. This typically occurs after making significant changes to the bow's configuration, such as adjusting the arrow rest or changing arrow weights.
Understanding Cam Timing and Its Impact
Cam timing refers to the relationship between the cam’s rotation and the bow’s draw cycle. Proper cam timing ensures consistent arrow flight and performance. When cam timing is off, it can result in inconsistent arrow speeds, deflection, and accuracy.
When to Adjust Cam Timing
You should adjust cam timing after making significant changes to the bow’s configuration, such as:
- Adjusting the arrow rest to a new position
- Changing arrow weights or lengths
- Installing new cams or limbs
- Changing the draw length or weight stop
Adjusting Cam Timing Using the Walk-Back Method
The walk-back method is a reliable technique for adjusting cam timing. To use this method:
- Set up the bow at the recommended draw length and draw weight
- Use a bow scope or rangefinder to measure the arrow’s impact point at the target
- Slowly walk the bow back until the arrow’s impact point moves from the target towards the shooter, typically 1-3 inches
- This indicates that the cam timing is too early and needs to be adjusted
- Repeat the process, making small adjustments to the cam timing until the arrow’s impact point is centered on the target
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