The best-known non-impact printers are the inkjet printer, of which several makes of low-cost color printers are an example, and the laser printer. The inkjet sprays ink from an ink cartridge at very close range to the paper as it rolls by.
Here is an easy way to find your draw length, simply stand upright with your hands stretched out (hold naturally, do not hyperextend) and measure your arm span from fingertip to fingertip. Take this measurement in inches and divide by 2.5. This will give a good working draw length for your bow.
First, look on the bow itself. Sometimes there is writing on the bottom limb or on the side of the riser. A typical writing might read, 58/30#. This means that you have a 58 inch bow from tip to tip and a poundage of 30 at a 28 draw length. Since the length of the bow is 58 inches you would need a 58 AMO bowstring. However, AMO measurements have actual string lengths that are 4 inches less. Therefore, your 58 AMO string is really only 54.