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About LinkBacksOK I'll bite. Why did you not go for the motor option, something that you have had experience with? I would have thought fitting two motors would have been much less work.Originally Posted by LMMasterMariner
OK I'll bite. Why did you not go for the motor option, something that you have had experience with? I would have thought fitting two motors would have been much less work.
Paul Jones (Feb 8, 2020)
Two motors would be just a step towards CNC lathe which I don’t need. There are couple of CNC kits for this type of lathe on the market, but I wanted to make power feeds myself. Need lathe with all the features that good lathes have. Once I fabricate additional screw cutting gearbox (Norton type with only 7 gears inside gearbox) I will have the following feeds: Longitudinal: 0.059, 0.071, 0.083, 0.095, 0.106, 0.118, 0.142, 0.165, 0.177, 0.189, 0.213, 0.236, 0.295, 0.354, 0.413, 0.473, 0.591, 0.709, 0.827 mm and Cross: 0.008, 0.010, 0.012, 0.014, 0.015, 0.017, 0.020, 0.024, 0.025, 0.027, 0.030, 0.034, 0.042, 0.051, 0.059, 0.068, 0.084, 0.101, 0.118 mm and all metric threads from 0.25 to 3.5 mm without any gear change. There was an additional challenge; nobody did this kind of modification for this type of lathe so far. At least I can’t find any information about it. And yes, I agree with you that fitting two motors would require less work to do.
Cheers
LMMasterMariner
Canyonman44 (Feb 10, 2020), Paul Jones (Feb 8, 2020)
I had a chuckle when I read that. I was faced with that recently when my spindle drive modifications got in the way of re-installing the change gears. New feed drive method for a lathe. I kept thinking about motorising the feed, but like you I do not need a CNC lathe and it would have been impossible to resist the temptation to go all the way.
Absolutely right! YouTube is literally filled with fellow machinists merely doing what hundreds have already shared.
Thanks for pioneering again into the hitherto unknown and uncharted realms of DIY!
Respect
Johan
mwmkravchenko (Feb 16, 2020)
I can't find part 2 of the vids. Do I take it it will come in May?? And do you happen to know how/if the G4003G differs from G0602? I have had the Grizz folks direct me towards the G0602 for parts. And I hate to ask, due to the time involved, will there be dimensioned plans? And what if I just want the automatic tool stop as mine has the feeds. I would be IMMENSELY interested in that!!!!! And I think I missed what activates the auto-stop?
Thanks Ken
Last edited by Canyonman44; Feb 10, 2020 at 07:37 PM. Reason: More ????
Part 2 should be completed latest by the end of May. Still have 2 months till end of my contract and expect to be home beginning April.
As you can find in Grizzly adverts, G4003G is real machine allegedly the second G stands for gunsmithing and G0602 is much cheaper lathe but quite okay for hobby. Nothing needs to be modified on G4003G unlike G0602. Here I put one more drawing for clarification of automatic stop. When part called "AAA" come to carriage stop (of any kind, so many pictures on the web) and as carriage is progressing towards to the chuck, AAA as part of yellow painted flat bar is moving backwards and by doing that, it's moving the latch out of engagement. Latch was made from the key 15x10 mm, length 75 mm. Hope it's more clear now.
Cheers
LMMasterMariner
Canyonman44 (Feb 10, 2020), mwmkravchenko (Feb 16, 2020)
Forgive me, I'm not as sharp as I used to be. Would it be possible to superimpose the schematic over a picture of the apron/carriage? Just a request, you are not obligated to do anything. Ken
as you wished. schematic over the picture. Hope you got it now. if not, i'm afraid that you will need to wait for part 2.
Canyonman44 (Feb 13, 2020)
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