Here is a list of all the postings Martin Bryars has made in our forums. Click on a thread name to jump to the thread.
|Thread: vfd inverter for Myford|
In reply to SillyOldDuffer, I have recently swapped the single phase motor on my Myford 254 for a 1hp three phase unit and Mitsubishi VFD supplied by Newton Tesla. Continuously variable speed is really very convenient particularly as I am idle and did not change belt positions sufficiently often. The lathe seems considerably smoother with a better finish. Part of that is that it is very much quieter and I have more confidence to use highish speeds and heavier cuts. I use indexable tools anyway. Fitting was a doddle as you just plug in, although remounting a heavy motor is not that easy.
|Thread: Myford ML7 faster speed|
As Speedy builder says, and some engines, for example Austin 7s, can be made pretty high revving, thinking of my sons' car.
I am either missing some point, or have misunderstood some posts, because it seems to be claimed that white metal bearings are only suitable up to around 1500 rpm. Admittedly the application is rather different, but car engines were produced for many decades with plain white metal bearings on crank- and cam- shafts running happily at much higher rpm for lengthy periods. They were not taking intermittent cuts of course, but presumably no-one is suggesting high revs on a lathe for that type of use, and of course they were well balanced and designed to take high revs.
|Thread: Strange Word...|
Which was fine until I got to "differently than in English". Differently from, perhaps to, but never than.
|Thread: Nuisance phone calls|
I had a secretary 20 odd years ago who was brilliant with cold calls. Where do you get your water was met by"From the stream outside the door". How do you finance your car fleet "We all have bicycles". I suggest telling them that you wash clothes in the local river. They don't have an answer to that.
|Thread: Bridgeport feed control lever|
Thanks Clive. I have looked at the clutch and it appears to be clean, but now will not quite go back, leaving a mm or so of daylight. The mechanism has been refurbished, os possibly adjustment is simply called for, however I don't quite understand why the clutch housing will not go fully back, unless the gear teeth are refusing to mesh. As a result, there is no drive to the feed. However, manual feed on the quill is nice and free. Hey ho.
Thanks Tony. I do have a manual and have spent some time looking at threads and videos, but they don't answer my specific questions.
I have recently acquired a Bridgeport but am having two problems, and had a third which I have dealt with. In transit, the locknut on the adjusting screw next to the quill loosened and I have reset this so that the vertical pin seems to trip the feed control OK. However, the feed control lever does not snap to and fro. It engages in a smooth slide and when released by the stop's motion, the bolt merely makes a rather half hearted slide with the lever hanging loose. I think it should release with a much more positive movement. The feed reverse knob continues to rotate and clicks.
I assume that this is probably because the clutch is wrongly adjusted and the ring controlling its force needs to be turned to tighten, but is this likely to be correct; I don't want to do any damage.
The quill also feels slightly rough when moved with the hand lever, as if a gear is catching slightly. I imagine that this might again be down to the clutch, but am not sure.
Wisdom from an expert would be greatly appreciated.
|Thread: Inverter connection problems|
I have just bought a refurbished Bridgeport with a Varispeed head which is very quiet indeed. There are videos on You Tube showing how to rebuild one. It is certainly much quieter than the Harrison mill I have sold, which was in good condition. I think if I were starting from where you are, I would rebuild the head.
I have inverters on both the Bridgeport and my Myford 254. Both are Mitsubishi. The one on the lathe is guaranteed for 10 years by Newton-Tesla, it being bought as part of their conversion package for a Myford to 3 phase. A 10 year guarantee normally implies a long life expectancy.
|Thread: Can summer car tyres be used in winter?|
I would also recommend Michelin Cross Climate tyres. I drive to the Alps twice a winter and the grip in snow and ice is excellent. They are also much better in standing water or on wet roads than the Continentals they replaced, which were what was fitted new. My wife is convinced that general roadholding and ride is improved and certainly they wear better. I don't notice that they are any noisier. My car is a 4wd Audi, estate (not an SUV).
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