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.
If a compound bow is set for a 29 draw length, for example, it should always be drawn back to a full 29 and then shot from that position. You should never attempt to shoot from the middle of the powerstroke. You only shoot after you reach full draw. If you haven't shot a compound bow before, don't worry.