Compound Miters, AngleMaster Pro and Other Stuff

Tomorrow is the beginning of my annual work retreat–truly the highlight of my year. I have several ideas percolating that I can’t wait to explore without interruption…. And for those of you who are trying to figure out how to manage you own work retreat, watch Jason Fried explain why the office is the worst place for productivity.

For those of you patiently waiting for the CT-17, we were ready to begin shipping about a week ago when I decided to change the lead screw–suffice it to say that the change is worth us eating the now old lead screws. This tool is now scheduled to ship in March. A similar event occurred earlier in the year when we delayed the Jointmaker Pro run after a  discovery led to a major improvement–it cost us a lot of money to do this but if it makes the product better, that is how it has to be.

The Universal Jaws are being made by the same shop as the CT-17, so when that job is complete, on to the jaws.

The TM-1 Tenonmaker components are built, and are being anodized and then off for laser etching. They should ship in the next two weeks or so.

I am often asked, “Why does it take so long to make BCTW tools?”  Below is a pic of our FDA approved testing of the KM-1 Kerfmaker. Yes, that is baby Calder working overtime. And, who puts their baby in skull and cross bones gear? Oh, that would be Michael.



HELPFUL TIPS REGARDING ANGLED CUTS AND COMPOUND MITERS
Yesterday we filmed a short video on how we use the AMPv2 to cut compound miters. The cool thing about the AMPv2 and the app is that the math is perfect out to 9 decimals–so math is never the issue, we as craftspeople are the reason things don’t come out light-tight. I hope you find the following tips helpful–these are the behind the scenes aspects of what you don’t see in the video.

  • Never rely on a static setup for quality work–we tested this yesterday and the difference between the static alignment of the miter gage/table saw blade and the actual cut was about 1/2 a degree. Always check your cut before you commit.
  • Angled cuts, either by miter gage, blade tilt, or both, create forces that challenge your ability to firmly hold the stock against the miter gage. We recommend that the face of the miter gage be skinned with 120 grit sand paper.  This completely eliminates the “squirt” effect. (Yes, I made that up, but it’s descriptive)  We really like the 3M Stikit Paper rolls for such purposes.
  • When a cut requires the saw blade to be tilted, raise the blade as far as possible and dial in your angle with test cuts in a strip of Masonite. This beats cutting 8/4 stock, all the dust, etc, and gives you the longest possible reference edge to check.  It typically takes me about 4-6 cuts before my cut is light tight against the reference.  Then lower the blade to the appropriate height for your stock.
  • Compound miters are a different beast. It is one of the few joints where both edges of your stock are placed against the miter gage. For this joint to be successful, your stock edges need to be parallel–otherwise your joint is doomed.
  • A little dry lube in the miter gage slot does wonders.
  • Back to compound miters; always dial in the blade tilt first with a miter gage set for a perfect 90 degree cut. Once this is light tight, repeat the process for the miter gage. Again, Masonite strips (about 6″ wide) are a great way to accomplish your intent.
  • When you are going to make a mission critical project, mill some identical stock out of something inexpensive (poplar is our choice out here), and test your processes. Nothing beats knowing that you are dead on.


–John

5 comments on this post:

  1. Oh man! March?!? Christmas is coming late this year (it will be this year, won’t it?). I have all these unfinished projects sitting around waiting for a double-bevel block plane. The customers are getting restless…

    Well, if you say it’ll be an improved product, I guess I’ll have to believe you.

    Great advice on the miters and compound miters. Much trickier to achieve with the Festool system (I don’t have a table saw), but I’m game to try.

    Hope you have a great work retreat. What do you use to lubricate the imagination? I had my annual brilliant insight yesterday, so that’s it for the rest of the year…

    – Peter

  2. Hey John,
    All the new tools rolling out are looking great, I am fairly new to BCTW but have already invested alot and couldn’t be more pleased. I know you must have a good surplus of new products to make, and I’ve already mentioned to Michael, that there seems to be a huge demand for pattern makers vises (or something to fill that demand). My sensei (master luthier Geza Burghardt) had me search out the discontinued Lee Valley Tucker vise, and after about 6 months of looking and almost shelling out $600 for a very vintage Emmert vise, I finally found one. But there are still lot’s of folks out there looking. Can’t wait to see the next video!

  3. John,

    Like Peter, I too am really bummed about the wait until March. However, knowing you there is a very good reason for the change and it will be well worth the wait. I am also very excited about the AMPv2. After playing with the prototype at the WIA and after you showed me the different procedures it can help me or anyone else with, I think it may be one of the best tools you have made.

    Fred

  4. Fred/Peter; It might not be that long. I am so bad at guessing dates I hedged my guess. That said, one of the drawbacks of outsourcing is that you have to get in a queue you cannot control. If this had not been a CT edition, I may have been less likely to add the delay. It will be worth it–it’s a good thing. I played it safe with the design and what this accomplished was a negative. By changing the geometry of the lead screw I am able to double the life of the iron (usable metal that can be sharpened). I should have caught it but didn’t, so I am the culprit.

    John

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