40 - Vacuum Clamping System, страница 28
SHOP PROJECT ?edeeta\ I began work on the support stand by making the pedestal. It consists of two parts: a base that anchors the support stand, and a column that houses a support post, see drawing. BASE In addition to holding the sand, the base adds rigidity to the column of the support stand. BUILD A BOX. The base nothing more than a simple box. But because the sand is quite heavy (about 70 pounds), it needs to be sturdy. So the ends (A) and sides (B) of the base are made fromlW-thick hardwood (maple), see Fig. 1. And they're joined together with rabbets and woodscrews. This requires cutting a rabbet in each end of the sides. There's also a rabbet in the top and bottom edge of each piece. These rabbets accept a plywood top and bottom that are added next. TOP/BOTTOM. The top and bottom (C) are identical except for one thing—a square opening centered on the top. Later, this opening accepts the end of the column. ASSEMBLY. To secure the column, you'll need access to the top. So set it aside for now and screw the other pieces together. Note: Don't use glue — you'll need to disassemble the box to add the sand. LEVELERS. With the box complete, I added four levelers. Each leveler threads into a T-nut installed in the corner of the base. This requires drilling a deep hole to accept the barrel of the T-nut and the threaded shank ofthe leveler, see detail b.' CASTERS. All that's left to complete the base is to attach a pair of fixed casters to one end. The casters are screwed in place so the wheels are above the floor, see detail 'a'. This prevents the stand from rolling when it's in use. But when you tilt it back, the wheels contact the floor so you can roll it around. COLUMN Now you can turn your attention to the column. Basically, it's a tall, hollow sleeve that allows a support post for the head to slide up and down inside. To create this sleeve, the column is made up of four plywood panels: a pair of curved 28 ShopNotes 40 |
