Member postings for Mike Poole

I had not considered using a hand wheel for setup but fortuitously the motor has a double ended shaft so fitting a handwheel will be no problem if required.

Mike

Hi John,

I have put this together for testing and it is working, just waiting to be boxed up,keypad not shown plugged in. I have a 24v supply on the brown and blue wires.

Does it matter what car you have? Surely the most important thing is what bike to have?

Mike

I have worked in engineering all my working life and have found most people very willing to share knowledge, but I have also met the 80-20 men who keep a bit back and even one guy we called the human diode who always wanted info but never gave any.

Mike

While it is not strictly true that single phase motors cannot be used with a VFD the motors need to be of a specific type. The motor you have is unsuitable so as mentioned above you will need a three phase motor suitable for a voltage of 220v between phases, this will usually be achieved by using a motor that is 400v between phases connected in star and 220v connected in delta. Some small motors do not have all six wires brought to the terminal block so the the conversion will involve the wretched business of finding the star point which will be loomed and varnished into the windings. Best to check any motor of interest has six wires brought to the terminal block. A careful study of the information plate on the motor will usually show the star and delta voltages if this connection is possible. Ready made packages are available for myfords and this may be the simplest way to go although not the cheapest. The advantage of a package is that it will work straight out of the box and the inverter will be set up and optimised and be safe. It is not to difficult to put the parts together and even make it work but as usual there is a right way and a wrong way to do things and looking at some of the installations on people's machines they do not meet any sort of standard or recommended design from the manufacturer. Two issues are important, electrical safety for the user and proper design of the installation to protect the inverter and the motor.

Mike

Edited By Michael Poole on 20/06/2016 19:02:44

I would recommend that you have a look at some machines in the flesh if at all possible, the various shows have a selection if you are not in too much of a hurry and the various dealers between them have most of the country covered with machines on display. It is hard to buy from a catalog or web site without being sure of what you are buying. YouTube has many machines shown being used if a personal visit to a dealer is not possible. Buying the wrong machine can be more expensive than buying the right machine in the first place.

Mike

It used to look good when you tore an old phone book in half but now it is less impressive.

Mike

Hi Phil,

The tooth form for a sprocket is quite involved, rapid chain wear may result if the form is not quite right. If this is for a high performance kart I think it would need to be made fairly accurately here is a link to one site with details. if it is for a low performance machine you might get away with what you propose.

Mike

The position of the thimble on a micrometer is usually adjustable and can make the reading of the mic a little more certain.

Mike

Edited By Michael Poole on 07/06/2016 11:23:51

I was jabbed just below my eye by the sharp end of a purchase sticking out of someones rucksack, not at Doncaster but another show, I have also been whacked by the quick turnaround but my 17 stone doesn't move far.

Mike

Recutting chips affects surface finish, probably wouldn't give a crop circle but chip clearance is important, brush frequently or use flood coolant to clear chips. To combat built up edge problems cutting fluid can help and also a good polished edge to the tool. Tips for aluminium are usually highly polished for turning to help the built up edge problem and promote the clearance of swarf.

Mike

To prevent any devices moving in a guarded machine when the personnel gate is open, the power for valves and drives is fed through relays monitored by a safety PLC. The PLC inputs used for monitoring draw very little current through the monitoring contacts of the relay so atmospheric pollution can cause an open circuit. Proper fault finding will determine the fault but a couple of shap blows to the panel backplane will move the contact enough to fix the problem. The maintenance lads love it when I recognise the problem and instead of spending time going through the drawings just give it a quick thump and we are good to go.If the problem reccurs the relays will be changed at a convenient time.

Mike

A useful point to know is that they will exchange butane for propane and vice versa, check on calor site for which sizes exchange. I have never bought a bottle but refill or exchange is no problem.

Mike

As Jason says a vice held in the main bench vice can be very useful. The instrument makers type of vice is good for small parts and has great flexibility in holding the part at all sorts of angles. Due to a manufacturing cock up my main vice is about an inch too high. I will make a duckboard to put this right one day, until I do it will continue to irritate me.

Mike

Castrol R was definitely the smell of speedway and grass track. Oxford speedway is no more and grass track and motocross seem to always being moved on by the nimbys. The ridgeway was a good fun ride until the utterly selfish walkers got it banned, just how many miles of footpath do they need, there must be tens of thousands of miles of footpath only so why do they need to take all the RUPPs as well?

Mike

Some gear oils are corrosive to brass and bronze, check that it is suitable for copper based alloys or that there will be no contact with vulnerable parts.

Mike

The procedure to dismantle an iPad is on YouTube, it looks fraught with danger of destroying the screen. The apple repair is probably a good deal.

Mike

Here is some info from the NPL on Hoffman rollers.

Mike

They are Hoffman rollers and are very accurately sized both diameter and length. It would seem they are for use as standard sizes, I suppose for setting or checking other equipment.

Mike

Edited By Michael Poole on 13/05/2016 01:34:31

A cynical view Bazyle, but an exhaust can improve the breathing of an engine to take advantage of other improvements. The bolt on noise makers can be an irritation especially when not accompanied by the rest of the package to actually make more power.

Phil Irvings book 'Tuning For Speed' is a good read to cover the basics of engine tuning.

Mike