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| kellswaterri:
I also felt that it was easier to obtain a rigid set up on the mill than it is in the lathe. Maybe I am following the wrong route. Hello all, John S, would I be right that some ''Professional'' milling machines have a powered variable ''fine'' down feed, so your comment re. boring on the mill would be quite justified...I stand to be corrected :wack: All the best for now, John. |
| bogstandard:
As Stew says, it is all to do with how happy you feel about doing the job. No two people have the same thoughts on doing a job, it all depends on experience in using what you have, and how happy you are with the setup. The safety aspect must always come into the equation, and if you don't feel safe with the setup, find another way to do it. I will relay a fact that that was told to me over the last weekend by a friend who races motorcycles. He had just heard that a well known tuning expert that he knew, had been killed. The 'expert' was turning, using the faceplate of his lathe to mount a component on. The part threw off the faceplate, hit him in the chest, forcing a broken bone into his heart, he died instantly. If that sort of thing can happen to a person doing it all the time for a living, we have to be doubly sure we have a rigid and safe setup when we do it. I do faceplate work, but I am always aware of the dangers involved, and class it as one of the most dangerous things to do on a lathe. Vibrations due to being out of balance, can cause nuts to loosen off very quickly. Lets be careful out there Bogs |
| sbwhart:
Good Advice John :thumbup: |
| sbwhart:
I'd like to thank John for reminding us of the danger of face plate work. And to add to Johns warning I'd like to point out a few precausions we should allways make when doing any set up 1:- Only use clamps bolts T-nut etc that fit the fixture correctly, don't try and bodge with the wrong parts 2:- Check and double check that everything is tight down and won't work lose. 3:- Before powering up check that nothing is will catch and damage your lovely machine or injure yourselve:- switch the power supply off from the machine and turn it over by hand. 4:- Run at slow speed all this face/angle plate work I did was with my machines slowest speed 70 RPM, before you power up check that you've got the correct speed selected, out of balance effects will be magnified by high speeds 5:- Don't stand in line with the work, stand to one side. 6:- Always wear safety glasses when doing any sort of machining, Keep your hair under a hat (if you have any) don't have lose bits of clothing flapping about, ties etc that can catch in the set up. 7:- Keep your hands or any part of your body well clear of moving parts. When working out your best set up don't be afraid to break it down and start again, it may take two, three or even more atemps, take your time and get it right, The safest set up is always the best set up. And Have fun :wave: Cheers Stew |
| bogstandard:
I would just like to add, I was in no way criticising Stew's setup, which was a nice rigid and safe affair. In fact it gave me a good pointer, must make me some of those cast lead weights, I always use clamping irons for balancing out, and the faceplate can soon become a bit crowded. Up until fairly recent times, when mills started to come down in price and model engineers now have access to them, most of the work was done using faceplate setups similar to what Stew is showing, and was an acceptable method of machining. The problem arises now, is that the techniques have generally slipped into the realms of forgotten about, and really, should you wish to try this method (and it is a good means of achieving what you want if you don't have milling machine access), then read up about the methods as much as possible beforehand, just so that you don't fall into any nasty habits by doing it by trial and error, that is when something nasty could go wrong. I normally supply links for you to read, but couldn't find anything decent in the short time I looked. Even Rog's great link http://madmodder.net/index.php?topic=594.msg2719#new only had one paragraph on faceplates. So really you need to do a bit of homework first, before trying out this method of holding. I am not trying to be a safety 'nanny', just trying to warn everyone that there are a few holes that you could easily fall into. John |
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