Second is the operating space around the machine. When the table saw is used to cut a piece of four-by-eight-foot plywood, the tool space increases geometrically, as the thirty-two-square-foot sheet of stock is pushed and pulled through the blade. Even if you’re not planning on using your table saw to cut plywood, you need to allow ripping and crosscutting space. This means that in front of and beyond the blade, you need distances at least as great as the length of the longest board you’ll need to rip; and that you’ll require space for cutoff work on either side of the saw.
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One of the misconceptions about planers is that they make lumber straight. They do some straightening, but they don’t make lumber straight. That is what jointers do. Many lumber mills just send rough lumber through the planer allowing the board to exit the machine with the same ups and downs and whoops that is entered with, only now to a consistent thickness. This is especially apparent when gluing up a couple of these roller coaster type of boards and trying to get them to line up. After a couple of those glue-ups, you will swear by lumber that has seen the jointer before the planer, and never skip the jointer.
Your sense of space and how to use it will be slightly different depending on the focus of your craft. If you are building furniture with hand tools, you will be able to make do with less space (under 300 sq ft.) than if you’re using mainly power tools and building sets of cabinets (over 400 sq ft.). Some 3D modelling with a program like Sketch-Up or some 2D layouts on graph paper with scaled cutouts can allow you to experiment with arranging your space and how much of it you will need. You should include not only the tools, benches and storage that you currently possess but also enough room to tackle new types of projects and new tools that you anticipate needing down the road. When you think you have a layout that works, test it out by mentally working through a range of different projects you might tackle and the needs you will have for material storage, assembly and finishing. Then revise as necessary; this process will allow you to hone in on a general square footage and layout ideas that will set you up to move forward.
High-velocity fans are also an important tool in their own right, particularly at your finishing station. Increased air flow will help dissipate fumes from paints and sprays for your safety, and you can train a fan on your project to help paint dry more quickly between coats on humid days. To get the most out of your fan, look for floor fans that are easy to aim or wall-mounted fans that will save space in smaller shops.
In addition to sheer power, look for a model with a built-in thermostat so you can set it and forget it. This convenience feature is well worth it so you don’t have to stop what you’re doing mid-project to manually turn your heater on and off to maintain your desired temp. A good garage heater will mount to the wall or ceiling to save space and will come with a durable housing and full safety screen to keep dust and wood chips from reaching the heating elements and starting a fire.
Let’s be clear about one thing: No workshop is perfect for everyone. If there were, I could simply give you a precise plan to follow with clear dimensions. Every person who comes to the hobby, avocation, or profession of woodworking has his own particular collection of tools and his own peculiar work style, skills, and desires for the kind of woodworking he wants to do that gives him a unique approach as to how he will lay out a shop: where the tools should go, where lumber and supplies are stored, and how much bench area he needs.