A weekend of birdhouses
Posted: Sun Jul 20, 2008 7:20 pm
This weekend our friends Jim and Kendall came up to visit from Baltimore. Jim had previously expressed interest in the Shopsmith, and we had come up with the idea of building some birdhouses as a weekend project. Jim and I would handle the construction aspect, and the womenfolk would handle the decorating. We decided to crank out a dozen birdhouses assembly line style, six for each couple.
For all pictures below, you can click on them to see a more detailed image.
First I started out by finding a rough plan to go by:
some birdhouse plans
I chose the one on the right but made some slight modifications to the way the roofs attach. I decided to use 1x5 lumber for the sides/bottom, and 1x6 for the front/back/roof. I created a spreadsheet which takes the two lumber widths and the roof angle as input, and gave me all the cut lengths needed. First we cut all the various pieces out:
[ATTACH]1796[/ATTACH]
The side pieces have a straight bottom and a slanted top. To cut these, I added the short and long sides together in the spreadsheet, and added another 1/4" as margin. I then cut long pieces out to this length, one per birdhouse. I then cut at 30 degree to bisect the piece, resulting in two side pieces. After this was done, the pieces were slightly longer than they needed to be (due to the extra margin I added). This was an extremely easy operation thanks to the miter gauge extension and its stop block:
[ATTACH]1797[/ATTACH]
This is easier to see if you click on the picture above to see the closeup.
One thing I noticed was that the acute angle side being drawn against the saw blade rotation developed some fuzzies:
[ATTACH]1798[/ATTACH]
This only happened for the specific combination of acute angle being pulled against the blade. It did not happen on the very same pieces when they were cut straight across. I have a Freud blade which is supposed to be good, but maybe this is normal.
The next step was to put 30 degree bevels in both ends of the roof panels and one end of the front panel. This was accomplished by tilting the table:
[ATTACH]1799[/ATTACH]
All the panels were originally cut from stock with a flat table, and the panels which needed bevel cuts were cut slightly oversize to allow the bevel cut with the tilted table. You can see how I cut them above. I used masking tape and taped a stop block to the rip fence. This prevented the stop block from getting pulled toward the blade as I advanced the miter gauge. The stop block automatically moved up and down the table as I adjusted the rip fence to cut a precise bevel from the flat end of a piece of stock.
I think a normal table saw would have been easier. Since the blade tilts and not the table, I could have loaded up the full 8' length of a piece of stock and just made repeated slant cuts to the precise length of the needed panels, instead of having to straight-cut the panels then bevel them afterwards.
Next we converted the Shopsmith to drill press mode to cut the entry holes and perch holes:
[ATTACH]1800[/ATTACH]
Using the bimetal hole saws was a bit scary because I was not sure what speed to run them against (it was not specified anywhere in the Milwaukee hole saw manual) and they made some interesting noises when first engaging with the wood surface. We had to clean up impacted sawdust from the hole saw teeth often. A good spade bit would probably have been easier. We cut holes at 1.5", 1.75" and 2" in diameter.
The Shopsmith in drill press mode made this operation trivially easy. We moved the rip fence to the desired vertical position of the hole, and used the flip-down stop to always keep the bit centered horizontally centered on the front panels.
...continued...
For all pictures below, you can click on them to see a more detailed image.
First I started out by finding a rough plan to go by:
some birdhouse plans
I chose the one on the right but made some slight modifications to the way the roofs attach. I decided to use 1x5 lumber for the sides/bottom, and 1x6 for the front/back/roof. I created a spreadsheet which takes the two lumber widths and the roof angle as input, and gave me all the cut lengths needed. First we cut all the various pieces out:
[ATTACH]1796[/ATTACH]
The side pieces have a straight bottom and a slanted top. To cut these, I added the short and long sides together in the spreadsheet, and added another 1/4" as margin. I then cut long pieces out to this length, one per birdhouse. I then cut at 30 degree to bisect the piece, resulting in two side pieces. After this was done, the pieces were slightly longer than they needed to be (due to the extra margin I added). This was an extremely easy operation thanks to the miter gauge extension and its stop block:
[ATTACH]1797[/ATTACH]
This is easier to see if you click on the picture above to see the closeup.
One thing I noticed was that the acute angle side being drawn against the saw blade rotation developed some fuzzies:
[ATTACH]1798[/ATTACH]
This only happened for the specific combination of acute angle being pulled against the blade. It did not happen on the very same pieces when they were cut straight across. I have a Freud blade which is supposed to be good, but maybe this is normal.
The next step was to put 30 degree bevels in both ends of the roof panels and one end of the front panel. This was accomplished by tilting the table:
[ATTACH]1799[/ATTACH]
All the panels were originally cut from stock with a flat table, and the panels which needed bevel cuts were cut slightly oversize to allow the bevel cut with the tilted table. You can see how I cut them above. I used masking tape and taped a stop block to the rip fence. This prevented the stop block from getting pulled toward the blade as I advanced the miter gauge. The stop block automatically moved up and down the table as I adjusted the rip fence to cut a precise bevel from the flat end of a piece of stock.
I think a normal table saw would have been easier. Since the blade tilts and not the table, I could have loaded up the full 8' length of a piece of stock and just made repeated slant cuts to the precise length of the needed panels, instead of having to straight-cut the panels then bevel them afterwards.
Next we converted the Shopsmith to drill press mode to cut the entry holes and perch holes:
[ATTACH]1800[/ATTACH]
Using the bimetal hole saws was a bit scary because I was not sure what speed to run them against (it was not specified anywhere in the Milwaukee hole saw manual) and they made some interesting noises when first engaging with the wood surface. We had to clean up impacted sawdust from the hole saw teeth often. A good spade bit would probably have been easier. We cut holes at 1.5", 1.75" and 2" in diameter.
The Shopsmith in drill press mode made this operation trivially easy. We moved the rip fence to the desired vertical position of the hole, and used the flip-down stop to always keep the bit centered horizontally centered on the front panels.
...continued...