Member postings for frank brown

I agree with you, Ian, I reckon that from a standing start, you would need 10 turns of the thread , before the pitch would become stabilised. These ten turns would have to be removed before the thread could be used. Any change in the drag of the saddle along the ways would end up in the pitch getting finer until the spindle has pumped enough correction pulses into the system (another 10 turns of the thread?).

Frank

I listen a lot to the Archers and find it so weird. The total cast is humourless, especially when two or more chaps gather. And the fact that they never mention money in numerical terms. Sort of like Brian said "theres a good profit in that" when referring to a land deal to his wife, where as, a real person would say some thing like " Theres at least 40 grand in it for us"

Not worth retuning for fifteen minutes..

Frank

What about that automata that writes his name in longhand with a dip pen , absolutely amazing.

Frank

Mole, what?

Frank

T slots are OK for production drilling where jigs and holding devices can be configured to them. But have a very small envelope when used with a machine vice , unless you are only interested in drilling over a small area. What I did was to convert the underneath of the table to a flat surface so G clamps can be used and importantly can be moved over the complete underneath of the table. It was simply to insert a piece of melamine covered chip board on suitably shaped spacers with holes through where the slots and centre hole were. The spacers were stuck onto the bottom of the table with car filler or such like and gauged up all to be the same distance from the top surface. The melamine chipboard was then screwed to the spacers. Its worked out very well. The only knock on effect was that my toggle clamp had to have its fixing thread extended to cope with the much thicker table.

I like that Warco idea, just needs to have a toggle clamp mounted on its end instead of the vice.

Frank

I have a "Site" battery powered drill, its about 15 years old (bought from B&Q). My problem is that they seem to have vanished , I can't find any reference to the name site, only, the word site as a description. So I have to fiddle with dead cells every 6 months or so so am getting fed up with having to do that. I was wondering if I measured the internal resistance of each cell when they are mean't to be charged would be an indication of how much further life they might have?. Sort of electronically switch between a charging current of .2A to a discharge of 5A 100 times a second. The drop in voltage (ripple) would be proportional to the cells internal resistance. But would it actually mean anything?

Frank

Lightweight Landrover, that's an oxymoron.

Frank

I can't see how you would bend up a tray. You need fingers to go inside the first two bent sides.. Selection of shorter clamps?

Frank

A bit more info on cells:- i was asked to look into the short life of sealed lead acid batteries that were used as processor PSU back up batteries in a major bit of capital kit. I got the battery companies rep. in to explain! His first point was he lifted a cell and said that it was short of water so we weighed it an it was several hundred grammes lighter then supplied. He then said it looked like a case of "micro charging". This is when the charging current comes from a switch mode power supply with insufficient smoothing. The fast pulses of current do not distribute them selves evenly over the plates (to reform them). Instead they over charge the plate nearest to the terminal, that then dies so the charging current moves further away and gradually kills the battery.

As the batteries were relatively cheap the decision was made just to changes them annually (all seven of them).

Frank

A bit more info on cells:- i was asked to look into the short life of sealed lead acid batteries that were used as processor PSU back up batteries in a major bit of capital kit. I got the battery companies rep. in to explain! His first point was he lifted a cell and said that it was short of water so we weighed it an it was several hundred grammes lighter then supplied. He then said it looked like a case of "micro charging". This is when the charging current comes from a switch mode power supply with insufficient smoothing. The fast pulses of current do not distribute them selves evenly over the plates (to reform them). Instead they over charge the plate nearest to the terminal, that then dies so the charging current moves further away and gradually kills the battery.

As the batteries were relatively cheap the decision was made just to changes them annually (all seven of them).

Frank

According to the circuit the stop switch is normally closed (short circuit from 1 to 3) which you have to break to stop. So look at your stop button find a pair of contacts that are normally short circuit but open when the button is depressed, wire one to 1 the other to 3.

Frank

According to the circuit the stop switch is normally closed (short circuit from 1 to 3) which you have to break to stop. So look at your stop button find a pair of contacts that are normally short circuit but open when the button is depressed, wire one to 1 the other to 3.

Frank

Only use MS in Southampton once, a, expensive and b, they sold me 5/8" bar instead of 16mm. ~ .015 smaller, right pain. Take your mic. with you.

Frank

Check the thickness of the thread's stiicky out bit on the male at both ends and in the middle of the screw with a vernier. Angle the vernier at right angles to the lead angle. i.e, not axially

Frank

i phoned through an order for some metal to a local dealer. After a few days they phoned back to say it was in so of I toddled to the industrial estate to pick it up. I just could not find the place. I then phoned them up to ask how to find them, to which I got the answer " opposite ZZZZ there are three units, the first is YYYY we are the middle one next to them." So we find ZZZZ and sure enough opposite them is YYYY, the next big box is some one else, err no, round the block again. I then went down YYYY's entrance and there were another two shuttered entrances, both with a reception door. So I went into the first door into a foyer and rang the bell, while I was waiting I read the notices on the notice board and found out that I had come to correct place.

Point to be learn't I guess its because of thievery that these places might like to keep a low profile, so phone up to get the exact location (my sat nav. was no use). I had asked some locals where they were and even they did not know.

Frank

Over running inverters will shorten their life. the question is from what to what? if it is an industrial product it could be rated at full power for 100,000 hours (about 12 years 24/7). For home workshop use, it could be 20 hours a week at 50% output and 2 hours at the 110% rating. This could still work out to be over 5 years. It what happens when its overloaded that is important, I would say that its mainly over heating which is going to kill it, so don't run it too long at 110% with out a cooling off period.

On the subject of the Audi, was the oil pump and oil cooler uprated? similar sort of conundrum.

Frank

Have a "day book", a diary in which you put interesting stuff :- machine set ups, telephone numbers in inside cover, whos who, grinding angles for tools. . . . Its so you can replicate set ups quickly and accurately. Just writing them down will help you remember and give the boss the impression you are organised.

Frank

Reminds me of when I was an apprentice, when I was serving a period as an electronic inspector. Was passed a batch of assembled servo motor gearbox assemblies. They were OK but there was no evidence of the thread locking compound being used. Big stink, as was my luck I was supported by the whole of the inspection department including the head of inspection. So some one had to go out and buy the compound and then disassemble the drives etc etc. It turned out that NO thread locking compound had ever been used, despite this arrangement had been in production for at least fifteen years. I wonder if it was strictly necessary?

Frank

The round belting(green) I bought has got an extremely rough surface and runs my Geo Thomas drill with the belt being extremely slack.. The previous belt, round, red and smooth, just got rotted (by the sun?) and fell into many pieces.

Frank

Are you sure that the drivers door lock can not be opened with a key or there is some hidden "emergency" key slot behind a plastic moulding (like on my Passat)?

Frank