Here is a list of all the postings colin beighton has made in our forums. Click on a thread name to jump to the thread.
Thread: Shesto cadet lathe |
26/01/2012 10:26:38 |
Good morning each. Thank you John S. for setting the record straight. I guess Alan Timming's involvement explains the watchmaker style round bed. Re the software problem,your links give a lot of new information and open new possibilities. Very interesting! Thanks everyone for your helpful input. Best wishes to all. Colin. |
25/01/2012 15:26:22 |
HI all,thanks for your interest. I'll tell you what I know about this lathe,or rather what I think. I may have got it all wrong. The bed is a bar diameter 1.5 inches which protrudes 19 ins. from the headstock. The carriage and tailstock both ride on this. It started life as a Connect 123 or 121, possibly in USA. They were bought in by Shesto engineering who did some work on them and rebadged them as the Shesto Cadet. They were CNC lathes. The original software ran on the old BBC Micro computer but was specific to this and does not transfer easily to modern computers. Also the motor drivers run in the old resistance limited mode. So I would plan to scrap all that, keep the motors and get new drivers and software. I expect that would mean a new driver board for the spindle motor as well. There is not much information about them on the net and the little there is, is from way back. Perhaps they did not sell well? Thank you Les for that link. It should keep me out of mischief for some time!
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24/01/2012 07:00:57 |
Good morning blowlamp. 1. The big driving motor for the spindle is supplied from it's own circuit board which has terminals for armature and field etc. How is the speed varied? Do you feed a digital or analogue signal into some of the other terminals? Do you need to have the tacho connected also? 2.The two stepper motors are made in Italy (MAE Offanengo) and have 4 pairs of wires. The wires of 2 of the pairs are joined together. How do the wires connect to the coils inside the motor? |
23/01/2012 20:39:42 |
Hello Ady 1. If you are thinking of the Denford ORAC then the answer is no. This is a smaller lathe with a round bar for the bed. |
23/01/2012 18:02:18 |
Also known as a Connect 123 lathe.? I rescued one recently and have it polished to a nice sparkle. Now I need two bits of (simple) electrical information. Can anyone help? |
Thread: How much ??? |
22/10/2011 09:43:43 |
Hi Richard. I have long thought that Hungary was the world's centre for all things crazy,but Romania sounds a close second. These stories are hilarious. Is there any chance of you and wotsit getting together to write a book. I'm sure it would sell well within this community. Regards, Colin. |
Thread: Spring Calipers |
30/03/2011 10:30:11 |
Thanks everybody for all your comments. I have learnt a lot. Regards, Colin. |
27/03/2011 21:19:06 |
Good evening Gordon. I gather from what you say that setting a caliper to fine limits is A) possible B) not impossibly difficult. All of which is good news. As you are an expert in this type of manual dexterity,can I ask 1)How carefully do you look after and fettle your calipers 2)When you are busy working which measuring instruments do you reach for first? Regards. Colin. |
25/03/2011 14:02:28 |
Hello mgj. I agree with all that you say. I'm afraid I was opening my mouth before putting brain into gear. I have read in books that people could set spring calipers very accurately and was really musing on how good they were and how to test the sensitivity required to be that good. But that will be just a bit of fun for myself to do. Thank you Dick,I will view your pictures with interest. May I now suggest-topic closed? Thanks again. Colin. |
25/03/2011 10:33:26 |
Good morning mgj. Thank you for input. Another idea to try would be to make some bolt on tips of various shape,rather like the sets of tips one can buy for vernier calipers. That just leaves the problem of detecting when the tips make contact with the work. I know practising daily for ten years will do it, but I can't guarantee having ten years left. So I was busy devising some clever electrical gadget when the name RENISHAW suddenly lit up and I discovered I was 40 years too late. As usual! Simply detecting electrical continuity will probably be good enough. Thanks again. Colin. |
23/03/2011 09:22:27 |
Good morning Dinosaur. Your reply is exactly what I wanted. I shall proceed accordingly. Thank you. |
22/03/2011 20:34:47 |
22/03/2011 20:28:32 |
The tips of my old spring calipers are very rough and need grinding to a nice smooth surface. The problem is-what shape to choose. There are 4 obvious options-a flat surface,a curved or rounded surface,a knife edge or a point. I can see advantages for all 4 options. What do other people do? Edited By colin beighton on 22/03/2011 20:33:36 |
Thread: collet thread |
20/08/2009 10:20:18 |
This job is now finished, using a v cutter followed by the thread file. I also had to fettle the back end of several collets in order to get them into the nose adaptor and now have a set of usable collets.Hurray! Thank you each. |
05/08/2009 19:54:25 |
Good evening Meyrick. Thank you for your encouragement. I shall take your advice, abandon the cerebral approach and start cutting actual metal. Best wishes, Colin. |
05/08/2009 16:54:35 |
Hello Patrick, nice to meet you.My collet threads only need 1-2 thou off and so far the thread file is coping. But in view of your cautionary tale I will make sure they screw in freely. My particular drawtube needs 0.638in. for full engagement. My lathe dates back to the last war and I had thought the size variation was due to poor quality control at that time, but perhaps not so in view of your remarks. Thanks for the info re suppliers. Regards, Colin. |
27/07/2009 07:45:39 |
Thanks John, I have now purchased a thread file. |
24/07/2009 19:52:58 |
My old south bend lathe arrived with a set of 3C collets.Some of them have obviously never been used because they are too fat to screw into the drawbar. I need to take 2-4 thou off. My experience so far with single point thread cutting has not been good. Is there are a better/easier way to slim down a fat thread? I cannot find a die for this size-0.0645x26. |
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