Showing posts with label work shop. Show all posts
Showing posts with label work shop. Show all posts

Saturday, January 31, 2015

Memories of the Past - Carvings Surface from the Boxes

As I have been going through the shop I have been finding all kinds of things. One of the things that occupied my time before the turning bug bit was wood carving. I still have a lot of the stuff around including some finished and unfinished carvings.


One of these days I have to get back to it or them or whatever. For now it is back to the massive cleanup. Maybe to find more memories.

Today's Postings

Start of the Cleanup

Wednesday, November 16, 2011

Ready the Band Saw for Wood Turning


After the wood lathe itself, one of the most used tools in the woodturning workshop is the band saw. For many woodturners, after the lathe and the grinder have been bought and set up, the band saw is the next purchase for large machinery. A few simple steps make it a better tool for woodturners and other woodworkers.
Like many woodworking machines, the band saw needs to be set up and periodically tuned for safe and accurate use. Most such machines in the home shop are typically two wheel saws, fourteen inches in diameter. The size refers to the diameter of the wheels and not to the depth of cut which will likely be in the six inch range.
Those wheels will look much like bicycle tires with rubber rims. While they will of course be clean in a new saw, as the tool is used the tires need periodically to be brushed clean of dust which will cake on to them especially from green softwoods. They also need to be properly lined up.
This means they need to be parallel to one another and running coplanar. There should be a means to adjust the distance of the free running wheel, that is, the one not powered by the motor. While this may be form shims, set screws or some other method, it should be noted in the instructions from the saw. A straight edge spanning both wheels, placed immediately before the axles, should touch the top and bottom rims of both the top and bottom wheels simultaneously for the wheels to be coplanar and parallel.
Once this is done, the blade should run at the center of both wheels. There will be an adjusting knob to track the blade. With the saw unplugged rotate the wheels by hand and adjust to track in the middle. Tighten the blade so it can be moved a quarter of an inch at center or follow the instructions with your saw. Each blade will need to be tracked and tensioned when it is installed and may need periodic adjustment during use.
A band saw is useful for wood preparation both for small projects and for large. For small, finer cuts a one quarter inch six tooth blade is a good one to start with for general use and wood up to a couple of inches thick. Heavier green wood for bowls and the like will require a three eighths three point blade or something similar. Like all saws, blades need to be kept sharp and clean for good use. Having a couple of extras on hand is a good idea.
Band saws are versatile for straight or curved cuts and a valuable asset for the woodturner. They are easy to set up and use as well as being one of the safest cutting tools in the shop.

Tuesday, October 18, 2011

Choosing A Wood Lathe: What To Look For When Sturdy Counts


While it is obvious that wood lathes spin wood around, it is not always obvious to the first time buyer that spinning wood, if out of balance, vibrates tremendously. In addition, wood lathes may be asked to spin very heavy sections of wood and need to be able to withstand considerable force. There are a couple of simple things to look for to ensure that a lathe is sturdy enough for the work at hand.
If you have a small shop and intend to turn small objects, it may seem as if sturdiness will not be a factor, but this is simply not so. Most small lathes turn at high speeds and have a very high minimum speed. Just as on a car, an unbalanced wheel does not seem a problem at low speeds but vibrates at high ones, the same thing happens on a lathe with unbalanced wood or with unbalanced lathe parts. While a small piece on a small lathe may not try to walk across the floor, vibration encourages poor cuts and difficulty in a good finish.
Larger lathes tend to have lower minimum speeds and thus allow for less vibration in unbalanced pieces. However they also are generally bought with the purpose of handling larger pieces of wood and thus more weight. A bowl blank of forty pounds is not unusual on a lathe with a twelve to sixteen inch swing and can literally walk a light lathe across the floor of the shop.
The solution to the problem is to have a lathe sturdy enough to handle the work. It starts with a good foundation such as a stand that is well made and heavy enough to not move under the forces of turning. Sand is a good vibration absorber and many turners design their lathe stands to hold hundred of pounds of sand.
The lathe itself should have lots of cast iron and steel in its construction. Stamped metal parts tend to give little support. Good welds should be looked for. Check with your woodturning friends and find out what lathes they use for the type of turning you intend to do and then find out if they are satisfied. Good bearings are a must and even more important are the bearing housings. Bearings are easily replaced but not where they live in the lathe.
One of the best tests of sturdiness is common sense when looking at the lathe. If it looks solid it likely is. This would not be just a catalogue look but rather a chance to stand at it and see if the steel is substantial and the iron castings are solid and well finished. The mechanisms to hold the headstock, tailstock and tool rest should be strong and lock firmly. Speed controls should move easily and switches readily accessible.
The final test of the lathe will happen as you turn on it. Many turners will push the envelope of size and speed and safety is each individual's responsibility but much of it can be ensured with good planning and a little foresight.

Friday, July 20, 2007

wood turning out of confusion


"Out of clutter, find simplicity. From discord, find harmony. In the middle of difficulty, find opportunity."
A. Einstein

I am in my annual or semiannual or whatever, 'clean the workshop' mode. As you can see I am also at the computer, fighting the mode well. At times the clutter is overwhelming and it needs to be cleaned. Sometimes it leads to more than a clean shop. A while ago it meant more turning when part of the cleaning was the intention of moving some wood out of the way. You might call it a bit of simplicity from the clutter and some harmony from the discord of walking through the mess.

I wonder how much turning results from the thoughts of cleaning a messed up shop and finding another log to work with or saying "I thought I was going to make a ### with that?" How many shapes have we just put in drawers or on shelves before picking up a piece of wood to move and seeing a curve just like the one on the pliers handle and saying "aha!"

Then of course there are the 'oopses' in turning. A side too thin or an intended bowl that is now a funnel. Design opportunities from accident. Opportunities in difficulty. Neat stuff. Einstein had a lot to say to a wood turner.