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Double Back Beam
for Wolf Looms


Assembly Instructions

PARTS LIST
2 - Baby or Mighty Wolf apron rods
2 - Baby or Mighty Wolf lease sticks
1 - Wolf Double Back Beam Support - Left (with insert installed)
1 - Wolf Double Back Beam Support - Right
(with insert, carriage bolt with washer and lock nut, and roll pin installed)
1 - BW Rear Oval Beam, or MW Rear Oval Beam
1 - Baby or Mighty Wolf Warp Beam (with brake hub and axles installed)

1 - Wolf Double Beam Wooden Brake Handle Tab
1 - Wolf Double Beam Wooden Brake Handle
1 - Wolf Warp Crank Bar with Tapered Handle (and hardware)
1 - 61" Brake Cable Cord
5 - BW Apron Cords, or 7 - MW Apron Cords (42" long)

2 - Black Threaded Knobs
1 - Wolf Brake Bar (w/attached brake cable)
2 - Wolf Double Beam Metal Fold-up Supports

 

HARDWARE LIST
2 - 3/16 x 1 1/4" Carriage Bolts
5 - 3/16 Washers
2 - 3/16 Lock Nuts
2 - 1/4 x 2" Truss Head Machine Screws
1 - 1/4 Barrel Nut
1 - Wolf Brake Barrel Nut (1 ½" long)
6 - 1/4 Washers
3 - 1/4 Nylon Washers
1 - 5/16 Regular Hex Nuts
2 - 5/16 Locking Hex Nuts
1 - Slim 5/16 Locking Hex Nut
2 - 5/16 x 2" Carriage Bolts
2 - 3/8 Washers
1 - 3/8 Washer (with larger outside diameter)
1 - #8 x 1" Flat Head Wood Screw
1 - Wolf Brake Cap Nut
1 - Wolf Brake Spring (w/attached insert)
1 - Wolf Brake Plastic Peg
1 - 1" S-Hook
1 - 1/8" x 1 3/16" Eye Screw
1 - 1/4 x 1 3/4" Hex Head Machine Screw
1 - 1/4 Lock Nut
1 - Wolf Brake Bar Eye Bolt

Steps 1-3: Attach the Double Back Beam Supports (Diagrams 1 and 2)

1. Insert the 3/16" x 1 1/4" carriage bolts through the square holes in the metal fold-up bars (6). Place a 3/16" washer on the carriage screw and then place the screw through the hole in the loom legs at (C) from the inside to the outside of the leg so that the bar hangs straight down behind the loom’s warp beam. Install a washer and 3/16” lock nut on the bolt at the outside of the leg and tighten it so that the metal supports just pivot freely.

2. Attach the double back beam supports (7&8) to the inside of the rear loom legs at (A) as follows: Align the left and right supports with the cutout for the oval beam at the top/inside of the each support. Insert the 5/16" x 2" carriage bolts through the holes in the loom legs at (A) from the outside to the inside. Place the double back

beam supports on the screws and fasten with a 1/4" washer and a regular (not locking) hex nut. Tighten the nut drawing the head of the carriage screw all the way into the wood. Now, remove the regular hex nut you have just tightened and install a locking hex nut in its place. Tighten the lock nut just enough to allow the double back beam supports to pivot freely, but not loosely.

3. Locate the black threaded knobs, and place a ¼" nylon washer on each knob. Insert the black threaded knobs through the holes in the metal supports and then install them from the inside to the outside, into the inserts on the double back beam supports at (F). The knobs will be inside the double back beam supports.

 

Diagram 1
 

Steps 4-7: Assemble the Brake Release System (Diagram 1)

4. Attach the brake handle (15) to the outside of the right front leg (l) at (L). Place a 1/4" washer on the 1/4" x 1 ¾" hex head machine screw and insert the screw through the leg from inside to outside. Place a 1/4" nylon washer on the bolt between the leg and the handle, then set the handle on the bolt and fasten with a 1/4" washer and 1/4" lock nut.

5. Attach the brake handle tab (diagram 1, 16) to the underside of the right front leg at (M) using the 1" flat head wood screw. When you pull the brake handle up to release the friction brake, pivot the tab over to hold it in the release position while you are either winding on a warp or winding your fabric onto the cloth beam.

6. Attach the S-hook to one end of the brake cord, as follows: insert one end of the cord through the closed loop of the S-hook, then thread the long end of the cord through the 2nd hole from the end of the short end of the cord, and pull tight.

7. Screw the eye screw into hole (P) in the right rear leg. Thread the free end of the cord through the eye screw, then up through the hole (R) in the brake handle (15). Put the plastic peg through the 10th loop from the end of the brake cord to hold the cord to the handle.

Diagram 2
 

Steps 8-13: Install the 2nd Warp Beam, Brake Cable and Apron Bars
(Diagrams 1 and 2)

8. Place a regular 3/8" washer over both axles on the second warp beam and insert the axles into the holes (E) in the double back beam supports. Be sure the threaded brake hub end goes into the right support. You will have to loosen the black knobs and spread the beam supports slightly to accomplish this. Place the larger diameter 3/8" washer over the threaded bolt on the outside of the double back beam support. Face the small hex side of the warp crank (20) out and slip it on the threaded axle. Secure it with the cap nut (P). Use the handle as a wrench to tighten the cap nut.

9. Place the rear oval beam (10) in the slots in the top of the double back beam supports. Attach it with the 1/4" x 2" truss head machine screws and barrel nuts provided. Note: the longer special barrel nut (H) is installed on the friction brake side of the loom (right side, viewed from front) with the threaded hole in the oval beam.

10. Locate the carriage bolt (G) that is already installed in the right double back beam support just below the oval beam. Install the friction brake cable and bar for the second back beam as follows: Place the brake bar (11) with attached cable over the bolt. Place a 1/4" washer over the bolt. Wrap the cable counterclockwise around the brake hub (12) four times (from the outside of the loom to the inside and from under to over). Place the cable loop over the bolt followed by another 1/4" washer. Put a lock nut on the bolt and tighten, making sure the brake bar can still pivot freely.

11. Insert the loop of the brake spring (S) into the brake bar in the same hole as the brake cable is attached. Place a 3/16" washer on the eye bolt (J) and insert the bolt through the hole in the top of the special long barrel nut and screw it into the insert in the brake spring. Tighten the eye bolt enough so as to prevent the warp beam from turning in a counter-clockwise direction. Attach the brake release cord to the brake bar by putting the S-hook through the remaining hole in the back of the brake bar. Adjust the tension on the brake release at the front of the loom by lengthening or shortening the cord with the plastic peg on the brake release handle.

12. Attach the apron cords to the second back beam. There is one cord for each hole in the warp beam. Insert one end of a cord through a hole in the beam and pull the cord through, a few inches. Insert the long end of the cord through the second loop of the short end that you just put through the beam and pull firmly to tighten (Diagram 3-A). Repeat to install all the cords.

13. Attach one of the apron bars to the apron cords, starting with an outside cord. Fold the loose end of the cord 4" from the end and insert this loop through the second loop from the end (Diagram 3B). Pull until the loop is large enough to accommodate the apron bar. Slide the apron bar through this new loop (X in Diagram 3B).
Note: the extra apron bar can be used for warping methods that require an extra rod through warp loops.

diagram of wolf loom double back beam and apron bar and cords

Diagram 3
 

Your double back beam is now ready to use. After you warp your loom, you may need to adjust each friction brake to be sure it's holding. The warp that needs to vary the most should be on the second back beam. This beam's brake is controlled by a hand lever, which provides greater control over the tension on the threads.

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