Uploaded by MPOWERTools on Nov 29, 2010
http://www.m-powertools.com/products/...
Need to draw a circle? or rather Need to draw an accurate circle? One where the finishing point actually meets the starting point? M.POWERs Flat Lying Trammel Head Set will guarantee you exactly that. Simply clip the two Trammel Scribe heads onto any length of steel or Aluminium Rule from 6 inch to - feet in length. Choose the pencil or the hyper fine cutting blade and strike that arc. Reducing the innacuracy of the traditional pair of compasses! Another Excellent woodworking tool!
Trammel Bar Compass vs. Flat Lying Compass
Lets compare. Have you ever tried to draw an arc or circle with a radius nearly as long as your reach with trammel points? Due to the vertical orientation of traditional trammel points, while marking or scribing an arc or circle they must be held perpendicular (90-degrees) to the work piece at all times to ensure accuracy and precision, and if the blade to which you've secured them flexes a bit, your arc or circle is no longer true, and if the blade lays over (such as when youre off-balance from having over-extended your reach) you may get a wild mark or no mark at all as the blade flexes and the focal trammel point slips out of its hole. Unless you have really long arms and a super-rigid rule, its usually tedious, aggravating, and inaccurate.
Can you see where laying the rules blade flat to the table top would solidify both the length and position of the marking apparatus? M.POWER's Scribe Heads have been designed to lay flat on the work piece, making them inherently stable, consequently giving you much more precise and consistently accurate marking of arcs and circles.
Do you sometimes need, or simply prefer, a blade instead of a pencil line? We've got you covered there, too. The Blade post is included in the kit and creates a cutting gauge that can cut parallel lines and circles. Add another for Japanese-style mortise marking with a knife. Ideal for trimming veneers and cards precisely, the Tri-Blade also allows very fine and accurate marking lines to be cut. This ability can be very useful when marking across the grain where a precise cut is more appropriate than a torn scribing line.
We all like marking gauges until they slip in soft grain or spalting or stick in a knot and make a wild mark, at which point we realize that it's not the gauge we like, it's only our expectation of the gauge.(Sounds like dating, doesn't it?) The problem with standard marking gauges is that you apply force perpendicular to the pivot point created by the gauges scribe, which is supported by nothing but the resistance of the wood to the scribe point, so if the point buries and sticks, your hand has a tendency to keep moving. Simply put, they wobble, are difficult to master, and don't make woodworking easy or fun because the leverage is all wrong and the scribe point is unsupported, so a material flaw or an untimely sneeze can quickly make a mess of your work piece. Adding a Tri-Scribe unit to a standard try-square or combination square transforms it into a very accurate and stable marking gauge because the forces in the marking unit are now parallel instead of perpendicular. Since the trammel heads will hold your choice of a scribe, pencil or blade, it is a both a marking and cutting tool, versatile, accurate, and simple to use.
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