If there’s anything that betrays poor building technique faster than a cut that has gone off track, it’s a straight cut. On the surface, you might think it has something to do with the saw (dull blade, material moved, or saw’s difficulty), and those things may well be to blame for the error. But in my experience, such early errors occur before you ever start the cut. A good, straight cut relies on several smaller tasks being performed correctly—the line being clearly marked; the material resting on a steady and unyielding surface; the body standing evenly; the cut initiated with a light touch and a good grip; the saw pushed gently and steadily through the material instead of forcing its way forward; and the line being followed, rather than the cut being forced to remain on the line. The effect of any one of these things not happening as it should can be seen immediately at the edge of the material.
A typical beginner error is to focus on just the front part of the saw. This feels intuitively correct because the front of the saw feels like the most crucial part of the cut, but it is frequently the cause of a cut not following a straight line. Straight cuts are performed by looking at and following the line before you reach it and not just reacting at the point of contact. When you fix your eyes only on the front part of the saw, you find your body (and your eyes) are constantly correcting the cut in the moment, and that leads to a meandering path. Try instead to have your eyes a bit ahead of the line as you follow a straight line. You find your cut is much more straight since you’re guiding the saw to stay on the line from much earlier in the movement and not constantly making “corrections” later in the movement. Often one small change such as this will make the difference between an errant cut and one that looks straight and true.
Early practice sessions should be performed on scrap materials and on short distances, not big, ambitious cuts that seem to require confidence in order to execute. Try drawing a few cut lines on a board to start with that are short enough that your full focus can be maintained through the entire cut. Set the material onto solid, non-moving material. Draw a cut line and start the cut on a slow speed, with a lighter pressure. This isn’t about getting through the cut fast. This is about learning to see how the saw gets into the cut, how much pressure the saw needs in order to cut, and how to maintain the line throughout the entire cut. If you are cutting and feel it starting to deviate from the line, stop. See how the saw is sitting, check the material that it’s sitting on and whether it is sitting near to the line, make adjustments to the way it is sitting and start again. Most of these errors and corrections can be made before you even start the cut.
To begin with, try using a short fifteen-minute session. Use the first few minutes to practice drawing a few cut lines. Make sure the material that you are cutting on is resting on material that won’t move and that will provide stability. Draw a few short cut lines (not very long lines, just ones that you can fully concentrate on), then spend a few minutes on the cutting part of the session, making sure to take your time. Make sure you know how to properly position the blade, your body, and grip on the saw. Finally, take some time to actually inspect the cuts that you’ve made rather than rushing into another round of the same exercise. Take a close look at the edges where the cuts have been made. Are there signs of burning? Are the edges of the material chipped? Do the edges look straight and level or are they slightly at a slant? This last point is very important. Just because a cut looks straight when looking from the top does not mean it isn’t drifting slightly at the beginning and end of the cut, when viewed from the front.
It is not uncommon for beginners to simply give up after a few cuts go off the mark. Often, the mistake is too vague (somehow it is wrong, you can see that much), but the problem isn’t quite clear. In this instance, the best option is to stop, reduce the difficulty of what you are doing, and instead of repeating the task a few more times, practice making the same cut. But rather than making the whole length of cut, just make the first few inches of the cut on a few pieces of scrap material. Just make the middle few inches of the cut. Try a cut very carefully and a cut very hurriedly and look at the results of the two. Building a skill becomes more effective when the errors you make are more clearly defined. A drift isn’t just one issue; it could be that the cut line itself isn’t clear, that your body position isn’t right, you are applying too much pressure and your support is poor. Identifying the problem helps you to fix the problem.
Eventually, straight line cutting becomes less about tension and more about timing. Your body will get a feel for how much pressure you should apply and the line will seem to be in your head. Your eyes will be on the line well in advance and will know when to stop applying pressure and when to begin. The hands will learn a proper grip and know when to apply pressure and when to simply let the blade do its work. This isn’t something that you can achieve faster by rushing the work. You achieve this goal by making several cuts and checking them out. The cuts you are making need to be straight and true in order to make your cuts and this skill only comes with repetition and inspection of your work. When you begin to cut, you need to be mindful that you are cutting straight, that the edge is square to your saw. Cutting straight cuts is more than just making a good looking cut.
