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Building a pedal board - 7 Print E-mail
Written by Vidar Fagerjord   
Wednesday, 15 October 2008 21:10
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Building a pedal board
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Update 11.07.2009

Summer vacation! Sadly, it started bad for me - the last week, I've been almost knocked out by some stomach problems, and have slept a LOT. Hopefully it's over now, so that I can enjoy the beautiful weather. Some work has been done though.

I have painted / varnished all the sharps to their final color. All the pedals are now ready for the last sanding and clear lacquer.

I started by masking the main piece of the pedal so that I could paint the playing surface without ruining the rest of the pedal:

Just some household masking tape placed precisely along the edge of the playing surface. Then I could work with the paintbrush focusing only on getting the varnish evenly distributed.

After the varnish had dried and hardened, I removed the masking tape - and the result is perfect! A little fine adjustment by sanding paper, plus a very light sanding with extra fine sanding paper all over (to give the clear lacquer a surface it can "grab"), and the only thing left to do is to add a couple of layers with clear lacquer.

The playing surfaces will get 4-6 coats with clear lacquer in order to build up a wear-resistant finish.

I glued the curved front frame piece to its base, using wooden dowels to strengthen the bond (just like the aft curved frame piece). I used a lot of clamps for this:

As described on page 3 (at the bottom), each pedal is guided by a dowel pin at the front. The dowel pins runs in the slots I made on the front of each pedal. I used rods of 5.6mm (.22") piano wire (musical wire) for this. I cut each dowel pin with an angle grinder with a cutting wheel, and formed each pin to the required length (I used 70mm) with the table grinder.

I made 33 pins - one extra in case I would do something wrong in the process. That's one thing I've learnt: make at least one extra of every piece there are more than one of! One extra playing surface, one extra pedal... Should anything go wrong, you will have a spare piece ready to go. And it is MUCH faster making an extra piece while your tools are set up, than making a single piece later on!

I grinded each pin to the correct length (most was off by .5mm or more due to the eye-balling cutting with a beast of an angle grinder...) and rounded off the edges to make the pins slide into the frame easily - and to prevent anything from being damaged at the top of the pin should there be a situation where it could happen.

33 dowel pins ready to go! And the leftmost pin is too short - good thing I made one extra!

These pins are made to go 20mm into the frame. I will make a tool to get the exact depth when I'm hammering the pins in - simply a wooden block made to the correct length with a hole through it. When the top of the dowel pin is flush with the top of the tool, every single dowel pin will be exactly the same height above the frame. Simple and effective!

I also made a tool for drilling the holes for the dowel pins. Each pin needs to be at exactly 90° to the curved frame (at each pin position) so that the vertical pedal movement follows the arc in the frame. The tool consists of a wooden block with a hole for the drill bit - i used the correct drill bit then sanded the hole slightly larger - and a support plate on each side. I also drilled a hole so that I can check where the tip of the drill bit will hit the frame, and in addition the wood chips have somewhere to go.

The side plates are glued and screwed onto the wooden piece. PS: the wooden piece is a scrap piece from other areas of the pedal board. Never throw anything away - you WILL need it later on! Great way to save money!

Here's an image of how the tool will work:

I will adjust the tool to its exact position, then clamp it before I start drilling. The drill bit will have a depth-stopper attached so that every hole is drilled to the same depth.

The dowel pins will just be hammered into the wood. They are 5.6mm, and the drill bit is 5mm. Remember the "proof of concept" test I did on page 3? That dowel pin was too short and I needed to remove it. I had to clamp it into the vice and use a lot of force to remove it from the frame! They won't go anywhere unless I really want them to...

Next up is to drill the dowel pin holes, assemble the pedal board (without the dowel pins - they go in after I've added lacquer to the front frame piece) and adjust the length of each playing surface on the naturals, as some of them are a bit too long. Then I'm going to break out the paintbrush and the lacquer for real! I am using water-based lacquer, and it dries within 30-45 minutes depending on the temperature. That means that I could get a lot of layers per day! The first layer needs to be sanded and adjusted though.

Not THAT much left to do. I can't wait to start using my pedals! But remember: It is soooo easy to rush the final steps just because you can see the end of a project. Just don't do it - you do not climb to the top of the mountain just to take a quick peak before you return!

Update 13.07.2009

Today I bought a new toy - a combined jointer / planer, so that I can mill my own stock. The only tool I miss now is an electric miter saw. Oh well... you can read about the tools I use at the tool page.

The main task for today was to drill the holes for the dowel pins in the arched front frame piece. In addition, I sanded it down and added the first coat of lacquer. I let the first coat dry and harden over night, before I scrape and sand the surface smooth for the subsequent coats.

I started by drawing the centerline, a task I simplified by making a small jig. I made a square cutout half the width of the arched frame piece, and cut a small dent / slot in the front so that the pencil tip was halfway embedded in the jig. Then I just had to drag the jig / pencil thingy across the arched piece, and the centerline was established. Since the position for each pedal was marked on the piece from back when I got the final placement of all the pedals (see update 11.11.2008), I could just find the center for each pedal and mark it on the centerline with the caliper. I then traced a line 90° across the curved piece to aid the alignment of the drilling tool I made the other day (see the image just above here).

I then hooked an adjustable depth-guide to the drill bit* so that each hole is exactly 20mm (.787") deep. All I had to do was to fasten the bit in the drill, center the tip of the drill bit on the line I marked and drill down until the depth-guide hit the drill-guide tool. Simple and effective!

*Note: a simple way to set the depth-guide in this situation is to insert just the drill bit into the guide, align with the mark and tap the top of the drill bit with a hammer until the tip of the drill-bit is embedded in the wood. Then use the caliper to set the desired depth for the depth-guide.

32 dowel pin holes drilled - the only thing left is to drill the hole for the pedal spring, which I will do when the pedals are mounted. That way, I get the exact placement and angle for the spring holes in the curved frame piece. Remember - every pedal meet the frame at different angles.

The last task of the day was to apply the first coat of clear lacquer. I use a water-based lacquer meant for hardwood floors. It dries within an hour, so that you can do many coats per day. And - there are no toxic contents, nor does it smell bad!

The first coat is applied - note that I rest the piece on triangular pieces of wood. That way I can coat the whole piece, and the support pieces only leaves a tiny line in the finish, which I can remove pretty easily. To remove the sanding marks from that process (makes the surface opaque), I simply use a paper towel with a small amount of lacquer and wipe the sanded area. Dries in minutes and leaves no trace!

Tomorrow, I will add two coats of clear lacquer to the piece, and it is ready for the dowel pins. In the meantime, the lacquer does its job drying and hardening while I sleep. That's my favvy way to work...



Last Updated on Tuesday, 26 June 2012 21:15
 
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