Demonstration Date: 23 July 2015
Demonstrator: Terry Scott
Author of Article: Wim Nijmeijer
Terry started by first giving us some general information about the wood, being Coolabah Burl (Eucalyptus Coolabah, found throughout Australia)
The burl is water blasted under high pressure to remove the bark and further processed in order to satisfy NZ customs. Typically there is a 24% moisture loss due to processing prior to importation into NZ.
Next Terry showed us a typical “flywheel” (can be made from custom wood or preferably from plywood)
The flywheel is used to attach the burl and also to balance the off centered burl.
A few examples of off centered turnings were shown.
Next the center of the burl was determined.
Terry then demonstrated how to attach the wood onto the flywheel. This was achieved by using a packer board, spacers/wedges and a glue gun and plenty of glue!
The packer board is then positioned and fastened with screws to the flywheel. Terry then removed all this and replaced it with a pre-mounted burl already fitted to a flywheel. (Center of burl at center of rotation, tailstock in place)
It was noted that this assembly was already sufficiently balanced.
The assembly was first rotated by hand before switching on the lathe at a slow speed, and then gradually increasing the speed to approximately 650 RPM.
The face of the burl was now turned. (Light cuts and rubbing the bevel)
Terry then showed us various pieces of lead used for balancing. Balancing is achieved on the lathe by attaching sufficient lead weights on the flywheel to offset the out of balance of the off centered burl. In this instance only 1 screw was used to balance the assembly.
With the tailstock removed the face of the burl was now completed using light cuts, followed by scraping.
With the flywheel still on the lathe, the burl was removed. (Including packer board, spacers/wedges)
Next a number of overlapping off centered circles were drawn on the finished face of the burl.
Then the burl was fastened again to the flywheel, with the first bowl centered on the tailstock. The burl was then balanced as required using 3 lead weights secured with 2 screws per weight to the flywheel. Webbing can also be used to provide additional security.
The assembly was first rotated by hand again before switching on the lathe at a slow speed. (Beware of the off centered rotating burl)
With the tailstock removed the first off centered bowl was turned using a 35-degree bowl gouge. Terry then finished the bowl using a ring tool (tungsten carbide ring) starting at the bottom of the bowl at approx. 80% and then rotated slightly as the cut progressed to finish the inside of the bowl. The bowl was then finally finished with the use of a negative rake scraper.
Next the burl and packer board were repositioned on the flywheel, by lining up the second bowl centered on the tailstock, and again fastened to the flywheel. This was then followed again by balancing.
The second bowl was then turned. First a 35-degree bowl gouge was used (light cuts, as cutting into the first bowl) followed by a 55-degree bowl gouge to finish the bottom of the bowl. Final finishing was done with the negative rake scraper. (Very light cuts)
The third off centered bowl, sanding and finishing with Danish Oil were not carried out due to lack of time.
All in all a very interesting demo with lots of additional information provided and as usual very well executed.
Thank you Terry.
Club Evening; 24th June 2015
Report by: John Smart
Graeme showed some of his work on these Egg Cups with hats on.
He started with some of his thoughts & work on this subject as there are many options; Pointed versions ex Richard Raffan, Round & full bodied ex Grey Lynn. Stories regarding Runny Eggs with lips to hold the juices. Ice Cream look-a-likes all made from different timbers. He makes all of his from all forms of wood like Tasmanian Blackwood which after use ends up with a good gloss plus all other types of supplies coming from the firewood bin and ever looked at wood locker.
His next subject was PENCILS 3 years ago he purchased 3 dozen Pink carpenters pencils and since then has never found one where he stores them he of course blames the Nombessssss.
We then got to the nitty gritty what size egg do we use and that required more discussion. It ended up as a size 7 egg you will find all the dimensions in our projects file EGG CUP.
Graeme created a entertaining evening and showed the skills he has plus a lot of technical advise that he uses which we can all adapt where necessary ourselves
Projects File; Egg Cup
Club Meeting: 17/6/2015
Author: Alistair Hancox
The St John volunteers delivered a very informative presentation on Wednesday night to those in attendance. We were given some sound advice on what to do should we or someone close by get into a spot of trouble. An interesting point made was that 30% of all calls to 111 aren’t for urgent emergencies. A key message from the evening was how to identify when to call the emergency line, and alternatively when to get yourself to A&E. If you’re even in doubt on whether to dial 111 for an ambulance, phone Healthline on 0800 611 116. A registered nurse will be able to provide you with advice. It’s important to note that in some cases, it may be quicker to drive the person in need to the hospital or A&E, rather than phoning for an ambulance.
Their main points of the presentation can be broken down into a number of key topics, outlined below.
The first question to ask is what’s the severity? Is if from a main vein or artery? If so, call for an ambulance. Some wounds can be associated with injuries beneath the skin. The first priority with bleeding, is to try and stop it. Apply pressure and wrap with a pad and bandage. If blood is leaking through the bandage, add another pad and wrap again. Do not remove the previous bandage.
It’s important to elevate any bleeding and bandaged part of the body. We were given a demonstration on how to fold a triangular bandage to rest a wounded arm in a sling. During the audience participation, the room began to resemble a scene from the television show M.A.S.H. It was just as entertaining too.
Foreign Objects Embedded in a Limb
Do not remove! Leaving it in until you are being seen by health professionals will avoid additional internal damage. If you can move and you can manage the bleeding, get to A&E. If not, phone an ambulance.
Apply pressure to the severed end. Take the detached appendage with you in a sealed plastic bag. Do not put it on ice. This will damage it and make reattachment and recovery harder. If you can get yourself to A&E, do so. If not, phone an ambulance.
It’s important to recognise the early warning signs: Chest pain, pain down the left side of the body, rapid or irregular pulse, blue colouring of the skin, or a feeling of impending doom. If someone is having a heart attack, call 111 and put them in the W-position. This is lying/sitting on the ground with your knees brought up. This will take some pressure off the heart.
Don’t rub the eye. Try and flush out anything that gets in there. Look straight. If you can’t get out something which has got in your eye, go to A&E.
A stroke is caused by a blocked blood vessel in the brain. Recognising the signs of a stroke are important (Facial droop, loss of mobility in ones arms or legs, slurred speech, etc.). It is very important to get the victim to the hospital as quick as you can. At the hospital, an injection is given which can break down the clot. This must be administered within 2 hours of the stroke for the best chance of recovery.
CPR should be done on someone who has become unconscious, isn’t breathing, and/or doesn’t have a pulse. The first instance in this situation is to call 111 for an ambulance, then begin giving CPR. CPR should be given in a sequence of 30 chest compressions to two breaths. You should be aiming to compress the chest by about 1/3. The patient should be on a firm surface, like the floor, not a bed. Chest compressions should ironically be to the beat and timing of Another One Bites the Dust by Queen. Keep CPR going until an ambulance arrives. CPR will unlikely bring someone back by itself, though it should keep the patient alive long enough to get a defibrillator to them. Defibrillators are becoming common in places like supermarkets or other community centres. They are very easy to use and increase the chances of survival dramatically.
The recovery position should be used when the patient is breathing and in a stable condition. Lay the person onto their side with their lower arm pointing straight up. Their head should rest on this arm. The lower leg should point straight down. Bring the knee up of the other leg.
If someone is chocking, grab them from behind and give them 5 strong compressions to the chest (Not the diaphragm!). Compressions to the diaphragm can cause damage to a victims internal organs. Follow up the 5 compressions with 5 hard smacks on the back. Repeat as necessary.
Photos: Ian Connelly