Member postings for Mike Poole

The 17th edition says the sockets should be positioned to minimize the risk of mechanical damage during use, insertion and removal of the plug. I think it would be difficult to achieve this at skirting level as the risk from kicks and tasks such as sweeping or vacuuming would damage plug and socket. Skirting level will almost guarantee that any surplus cable will form a trip hazard or leave cable vulnerable to crush damage.

Mike

My dentist uses the Cerec crown process which can see you you in and out with a new crown in 1hr. He uses a camera to make a 3d image of the gap and remaining part of the tooth to be crowned after drilling away damaged tooth. The computer models a tooth to fit the stump and gap, a bit of manual adjustment to the model and the finished model is sent to a cnc two headed millling machine and after loading a block of the correct colour ceramic the machine produces a crown ready to be cemented in position. A finished job in less than 1hr (not cheap though).

check out cerec crowns on youtube.

Mike

The after effects of a good curry can make opening all the windows in a hurry a good idea.

Mike

I note that George Daniels had a Myford in his workshop amongst a selection of desireable machinery.

Mike

Engineering is engineering no matter what the size of the end product. Model engineering due to the size of the finished article uses techniques from instrument making and watch/clock making as well as other size methods. I doubt that anything is unique to model engineering.

Mike

The person who never made a mistake never made anything.

Mike

I worked in the toolroom as an electrician when I came out of my time, our workshop was next to the spotting presses where the toolmakers would bed one die to the other half which involved a lot of grinding, I would go home filthy just from the fallout. It was an interesting place to work but like the press shop you went home dirty and could see the dirt run off you in the shower.

Mike

I am sitting about 30m from the where the conveyor for RR bodies ran that were made in Cowley. Even these high volume bodies (8 a day) had a huge amount of lead applied to get the door fitting correct and to make the body look as if it was made of one piece. High volume cars are more accurately made because the investment in press tools and jigs is much greater and tolerances for automated assembly must be tighter.

The steel for the conveyor trucks to run on is still visible in the floor of the building where MINI's are made today.

Mike

A simple inverter will rectify the incoming supply to provide a high voltage DC supply which can be used to create 3 phases. Torque will fall considerably at low output frequencies and although high frequncies can be created the power will be limited but a free running motor can be made to spin very fast. Specially made motors can be run at 25,000rpm. for applications like how power routing,  no doubt much higher speeds are used with specialist equipment.

Various manufactures produce a more sophisticated inverter usually incorporating some or all of the words "sensorless flux vector". This type of inverter uses powerful processing to estimate the position of the rotor and thus time the phases to produce high torque at low frequencies. Sophisticated industrial inverters can accept an encoder input to give rotor position and can produce near servo system performance from a humble squirrel cage motor and produce full torque down to a standstill, this will cost serious pennies though.

I think the sensorless flux vector drives are worth paying the extra for as the improvment in performance is worth it, but it depends how deep your pockets are and how averse to belt changing you are.

Mike

Edited By Michael Poole on 29/04/2014 21:05:29

My Myford bed is not scraped and although around 30 years old is still as good as new ( it has had an easy life)

Mike

The Nippy vice was made by Murray Son ltd

Mike

The thread. "stuck clutch" covers some tips to get out of this situation.

Mike

Rules are for the guidance of wise men and the blind obedience of fools

Hemingway kits sell these now, check out their small boring bars.

Mike

A new bush is available from Myford, if the shaft is still in good condition I think I would replace the damaged bush.

Mike

The publisher was Babani.

Mike

I have a Warco VMC and are very pleased with it. I went with the R8 quill and find it very easy to change tools but my ER collet chuck is usually installed. I am in the process of fitting a DRO, and power feed is next on the list of improvements. It is simple to remove the knee and head assemblies for installation and two strong people can manage dismantling and reassembly

Mike

Following a breakdown on a machine where we needed to take some voltage readings from inside a guarded area while the equipment was in automatic mode we retired for a coffee. Refreshed by the coffee I had a great idea that if the display of a multimeter could be removed and a bluetooth connection made to transfer the readings to the display this would be much safer than other methods, with a bit more discussion we thought a phone app could be used to display and even log the data. When I got back to my office a google search found that Fluke had taken my idea and made just such a meter and you could even buy them from RS ! That is quick work.

Mike

It seems we all think the same way so Z plus will be knee down. Thanks chaps for your input.

Mike

I have a vmc mill to which I am fitting a DRO. At the moment I am only fitting a scale on the knee and not the quill which I usually keep locked. I think the usual convention for the Z positive movement is when the cutter moves away from the work so I would interpret this to be when I lower the table, I think I should set the DRO to register a positive movement when lowering the table. Does the forum agree?

Mike