Explanation of Pin Spacing Choices That I have used. This information might be useful to a Do It Yourselfer.
Fine Sett: Hypotenuse, slightly less than 3/8" (actually 9mm) Sides, exactly 1/4"
Medium Sett: Hypotenuse, slightly less than 7/16" (.442") Sides, exactly 5/16"
Standard 1/2" Sett: Hypotenuse 1//2" Sides, exactly 9mm
You can see that the Medium Sett is about half way between the fine sett and the standard sett.
The first Hideaway brand adjustable triloom I made was a 3' loom, medium sett, that adjusts down to 2.5', 2', and 1.5' sizes. The current version adjusts down in 3 inch increments. The 3' size is a full 36" along the hypotenuse (long) side of the triangle. The smaller you adjust this type of loom, the more you have extra wood rails sticking out in 3 directions. Still, it is practical for use when it adjusts down a foot or so smaller than the largest hypotenuse measurement. At first I used the mediuim sett pin spacing but I later figured out that I can make adjustable looms in fine seet too. I can now make adjustable trilooms in any of the 3 pin spacing plans shown below. Photo below shows the 3' adjustable triloom set at 2 1/2'.
Go to www.etsy.com/shop/RogersLooms and you can see what I have presently have listed for sale there. I can sell any of these looms directly to you if you contact me using the CONTACT link. I can discount the Etsy price. This is also a way to arrange for a custom order or if you have questions. Pictured below is one of my large Hideaway Adjustable Triangle Looms. These triangle looms adjust like many others, in a "pinwheel" fashion. That is: the smaller the adjusted size, the more the excess wood rails stick out in 3 directions. In my opinion, the loom is most practical when used in one of the larger adjusted sizes. I make them adjust down smaller as it is possible someone could use them at the smaller settings, for example hung on a large wall space.
When I changed my method of making multi-size triangle looms, I made the adjustable loom with "Medium Sett" pin spacing. This is about 7/16" between nails on the hypotenuse or long side. This is a little closer than most triangle looms. It seemed to suit a lot of continuous strand weavers, I made a lot of them.
Now in May, 2017 I have started making my large adjustable trilooms in the standard 1/2 sett, the same as most triangle loom makers. I may have been missing out on sales. I want people to get the loom that works best for them, and the coarser sett can always be 'double woven' to get the tighter weave. There are 2 ways to do this: Use two strands as one or double up on some of the pins. I will always be able to make someone a Medium or Fine Sett loom upon request. If you don't see one in my Etsy shop, be sure to ask me. firstname.lastname@example.org
For my 7' adjustable triangle looms I have been making the size 7', 6.5', 6', 5.5', 5'.& 4.5'. The adjustment settings are every 6 inches, going down from the largest size. I have started making the looms adjust to smaller sizes even though I do not think it is practical for everyone.
My looms have one-piece oak rails that are very strong. Even though triloom continuous strand weavers know to weave loosely, sometimes the tension can get very tight and lots of strain is put on the wood rails.
Triloom Frame Strength
A standard pin spacing 7' (84") loom with 1/2" hypotenuse spacing has 169 pins on each side.
My medium sett 7' loom has 191 pins on each side. 13% more on each side than standard sett.
My fine sett 7' loom has 238 pins on each side. 41% more than standard sett.
Each strand of yarn exerts a pull on the loom frame rails. The more strands of yarn, the more strain on the loom frame. The tighter you weave, the more strain on the frame. Towards the end of the project the weaving gets tighter and tighter and can be enough to bend the rails. Or as some have found out with home-built looms, the tension can cause structural failure. Just saying, looms with finer pin spacing need to be strong and one-piece oak rails are strong.
Formula for figuring the yardage needed to complete a triangle loom project. Additional yarn would be needed if you want a fringe.
Measure the length of the longest side (hypotenuse) in inches.
Multiply that length by the number of pins on a side. Triangle loom side all have the same number of pins on each side so count any side.
Divide by 36 to get total length in yards. This formula works with any triangle loom, regardless of pin spacing.
Additional info on this can be found at www.waynesthisandthat.com/triloom2.htm - look down on page
My 7' Hideaway Adjustable Triangle Loom has a weaving hypotenuse of a full 84 inches at the largest setting. Some other common brands have sold looms that fall short of their advertised size. Medium Sett shown here.
Click here for Triangle Loom basic weaving instructions - continuous strand weaving. Also look for youtube videos - Weaving on the Triangle
My small Hideaway adjustable trilooms are 3', 4', or 5' in size. There are made with 1.5" wide oak wood and fastened at the corners with screws that turn into pre-tapped holes in the oak rail ends.
Machine screws turn into hidden metal dowel nuts. There are no fasteners showing from the front. The back of the loom is smooth, it can be hung on a wall without damaging the wall.
Large HIDEAWAY Adjustable Triloom Sizes: These are made with 2.25" wide oak wood and are fastened as shown with machine screws that turn into sunken metal nuts.