Here is a list of all the postings Michael Cox 1 has made in our forums. Click on a thread name to jump to the thread.
|Thread: 12 volt motor speed controller|
Michael - the speed control module I used MFAcomodrills part number 919D29, see:
I built a power drive for my mill table. This allows slow variable speed for cutting and full speed for the return. The cut direction is selectable. The speed control is based on a pulse width modulated speed controller. Full details are here:
|Thread: Acrylic as an Insulator|
The only problem with acrylic as an insulator is that it has quite a low softening temperature. This makes it usuitable for situations exposed to heat or where the switch may get hot. In these situation phenolic plastics like bakelite , Tufnol and Paxolin are better as they are much more heat resistant.
I never met John but I had several conversation with him and received very good advice on machining matter
|Thread: Component Suppliers - Recommendations?|
My go to source for electronic components is ESR Electronic Components. Always very helpful and goood delivery.
|Thread: Sieg X3 Tacho|
Clive, I do not know how similar your X3 is to my little X1 mill but I have added a tacho, see:
The tacho unit was supplied with a hall efect sensor but the sensor was too large to fit in a convenient place so a made a simple optical reflective sensor which works well using a reflective strip on the spindle.
|Thread: Chemically cleaning brass - gently|
Nearly all copper and zinc corrosion product will be soluble in household amminia solution. This will rapidly dissolve the corrosion products. Unfortunately household ammonia solution, which used to be a common cleaning agent during most of the 20 th century, is now quite difficult to find although it is readily available via ebay. If you use this wash with water afterwards and then rinse with alcohol (methalated spirit, denatured alcohol) and leave to dry.
|Thread: Mery Christmas Everybody|
Merry Christmas to all. Lets hope that the New Year is better than 2020.
|Thread: Parts Washer Pump|
If you go on ebay and search engine oil extractor or diesel oil pump there are many small low voltage (eg 12 V) pumps that typically pump about 5 litres/min available. They cost circa £10 and are rated at 60 watts.
|Thread: is there an easy identification test for Nickel and Chromium ?|
Chrome plating is much harder than nickel plating and usually much brighter. Compare a few items that are chrome plated using a fine steel scribe. Do not press hard and try to scratch the surface. The difference between that and normal steel and nickel is striking. Do not press hard because the plating is thin and if you press hard then the metal underneath will deform and it may appear scratched, Practice on a few chrome plate items and mild steel to see the difference.
Whiting is finely ground chalk that is used as a pigment in paints and in papermaking. It is practically pure calcium carbonate. It is a fine white powder.
For information chalk used on blackboards is not calcium carbonate but calcium sulphate so do norrt be tempted to grind up these.
|Thread: Home made cast Aluminium|
I have been melting aluminium and casting for a few years. It is relatively easy to make a propane gas fired furnace to melt aluminium from simple readily available materials. Old aluminium castings are the best source of material but I frequently mix old aluminium extrusions into a melt and this does not seem to be too detrimental. I usually make lost foam castings and these can have complex shapes. For stock for machining I usually cast in old tin cans for the larger diameters (50 mm -75 mm). The can after casting is simply cut and peeled off the solidified aluminium when cold. Smaller diameters are just cast in green sand using a bar of the right diameter as the pattern. The cast material usually machines very well. I once cast a rod from melted drinks cans but this was very gummy and it did not machine well.
To get a good clean casting without inclusions or void it is important to use a flux. I use a product called LoSalt which ios mixture of sodium and potassium chlorides as flux. This is readily available in supermarkets as it intended for people that need low salt diets. I desert spoonful of this in a one litre melt of aluminium brings all the dross up to the surface where it can be readily scraped of usinf a spoon.
I wrote an article that was published in MEW some years ago describing making the furnace and burner and describing some of the casting techniques. There is also some information on my website covering this, see:
|Thread: SX1 Mill Motor Shaft|
I did my own belt drive conversion, see:
I hope this helps.
|Thread: Measuring Gears (including pressure angle)|
Thanks for the post and the link.
Thanks for your post. Is this an original idea? What is the maths behind it?
|Thread: How do I Calculate Pulley Diameter for Timing Belts|
You can look up the outside diameter of standard pulleys in manufacturers literature, see for example:
When I have machined timing belt pulleys I use the given outside dimension for the number of teeth and then cut the grooves to give the require angular pitch.
Should be possible to use the same method to 3D drawing and then print.
|Thread: Rotary Table Chucks|
The most useful chuck I use on my rotary table is an ER32 collet chuck on an MT2 morse taper. This also fits into my lathe using an MT2 to MT3 adaptor. THis is especially useful for gear cutting because you can turn a part to size on the lathe and transfer to the rotary table with no loss of concentricity.
|Thread: CMD10/SeigX1 query|
I made a lever to clamp the quill that does away with the need for a hex key, see:
|Thread: DIAMIND DISC|
I am, I believe, the author of the author of the article you are searching for. It was entitled " Re-purposing on old bench grinder" and I think It was published during 2016.There was also a follow up article published a little later entitled "Further modifications to an old bench grinder", I have spent a good part of the day unsuccessfully trying to find my copy of the article in order to give you an exact reference to the articles. I am also having trouble viewing the MEW digital archive so this provided no help.
There is a short write up of the project on my website, see:
If I can be of any further assistance please send me a pm.
|Thread: Anaerobic adhesive question|
For many applications, such as the one being discuss, I prefer to use slow cure epoxy adhesive rather than anaerobic adhesive. This gives plenty of open time and it forms a very strong bond with steel (and most other metals).
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