Gang tooled Lathe Must have Features?

TDegenhart said:

Gang Tool Lathes Boost Outuput

Tom

I could see something like this Dorian tool bar system. However, I would be tempted to use two tool posts as one has been known to turn; two posts are also much more ridgid.Tom

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Yeah have seen that, problems cost and costs of adding multiple set-ups. That said the basic idea has merits. What i have considered is having a parting set-up the far side, then having a stop, spot drill and maybe a std pilot drill size as one tool block, then having a separate removable tool block containing every thing else that&#;s job specific. tool blocks look like im simply going to have a bunch - pattern of dowel holes and M8 tapped mounting holes. Like this things will peg for approx location and then bolt for security, im sure anything i can make alignment wise will need off set tweaks at swap over, so rather than getting all silly and elaborate, seams best to stick with KISS, and just get things located within a few thou and then tweak the offsets as needed thats really easy to do control wise too.

Parting wise sami, yeah, its gotta be addressed, currently the chuck centre line to cross slide top is a good 5 1/2" Am kinda planning on having the parting tool sit on a gantry like structure, upside down, rear tool post style, part catcher in the middle of the gantry. Some of the little brass and nylon bits this will be doing have a really bad habit of launching every were, (could probably complete a order or 2 of em if i cleaned out behind the current lathe!) like this the part could be cut off more or less in a tunnel and drop down - be deflected down out of the way nice and safely. For the time being this will have a 3 jaw 6" chuck, so part pulling - self feeding is off the menu for a while but the spindle does have provision for a draw bar + the controls got the capabilities of having it added. Just at this point, i need her working, not racking up ever more cost - complexity. Theres a 500 of parts order on the radar for october, it takes me a week to turn em by hand, hence i really want this working by then no fail!

Hardinge tooling is not as readily available over here, simple as that, hence tying it to some odd std of tooling i can not easily get seams silly, far easier to stick with say, 32mm 25mm and 20mm mounting holes! Can get tooling to fit thoes in the 6 for £100 range which is more or less cheaper than i can buy collet nuts and steel to make my own holders! Equally i don't want the complexities of turrets, just don't need them for what this is doing and slinging the extra weight of a turrets drive around will slow things down even more. This is not about having a big powerful industrial work horse, this whole projects about a cheap cnc lathe that makes the parts i need as simply as possible. whilst fitting into my very very limited shop space + working on my limited power supply. Trust me, if i had the power and space there would be a twin turret with sub spindle at work now. As is i need a gang tooled lathe for production, but the option of stripping it off to make up some large circa 10" diamiter contoured short rollers for in house future tooling needs, ergo this will do both!

Control wise, its Linux CNC. Will be programmed off line through my current cam so none of that&#;s really a issue right now. Controls will not be in the PC though, i now have a MESA 7I76e card which will handle real time events very very nicely! Currently its running the largest steppers i can get, in time it will probably get switched to servos, but again funds and such dictate a cheap get it running and upgrade later approach. All control - interface parts will use industry std stuff so i can get spares fast and easy with no OEM crap or obsolescence issues. All electrics will be IP67 enclosed, theres ample spare capacity in all cable chains for future upgrades too, oh yeah this is not some alu extrusion build of ebay either, currently we are just over - approaching the 400Kg mark with over 1/4 ton of steel 1" flat making up the key bed part :-) can't wait to find out if i over engineered it enough to get rigidity numbers to were i think they are or not? Goal was to be as or more rigid a lathe than my current 11" harrison, machine bed wise im easily at double the material mass. The beds wider (11" wide rail centre line) and all the preloaded linear rails are lovely and slop free :-) but nothing shows or destroys the ideas of rigidity like sticking a boring bar in a deep hole so time will tell on that! But its fair to say im very very hopefull.

Yeah have seen that, problems cost and costs of adding multiple set-ups. That said the basic idea has merits. What i have considered is having a parting set-up the far side, then having a stop, spot drill and maybe a std pilot drill size as one tool block, then having a separate removable tool block containing every thing else that&#;s job specific. tool blocks look like im simply going to have a bunch - pattern of dowel holes and M8 tapped mounting holes. Like this things will peg for approx location and then bolt for security, im sure anything i can make alignment wise will need off set tweaks at swap over, so rather than getting all silly and elaborate, seams best to stick with KISS, and just get things located within a few thou and then tweak the offsets as needed thats really easy to do control wise too.Parting wise sami, yeah, its gotta be addressed, currently the chuck centre line to cross slide top is a good 5 1/2" Am kinda planning on having the parting tool sit on a gantry like structure, upside down, rear tool post style, part catcher in the middle of the gantry. Some of the little brass and nylon bits this will be doing have a really bad habit of launching every were, (could probably complete a order or 2 of em if i cleaned out behind the current lathe!) like this the part could be cut off more or less in a tunnel and drop down - be deflected down out of the way nice and safely. For the time being this will have a 3 jaw 6" chuck, so part pulling - self feeding is off the menu for a while but the spindle does have provision for a draw bar + the controls got the capabilities of having it added. Just at this point, i need her working, not racking up ever more cost - complexity. Theres a 500 of parts order on the radar for october, it takes me a week to turn em by hand, hence i really want this working by then no fail!Hardinge tooling is not as readily available over here, simple as that, hence tying it to some odd std of tooling i can not easily get seams silly, far easier to stick with say, 32mm 25mm and 20mm mounting holes! Can get tooling to fit thoes in the 6 for £100 range which is more or less cheaper than i can buy collet nuts and steel to make my own holders! Equally i don't want the complexities of turrets, just don't need them for what this is doing and slinging the extra weight of a turrets drive around will slow things down even more. This is not about having a big powerful industrial work horse, this whole projects about a cheap cnc lathe that makes the parts i need as simply as possible. whilst fitting into my very very limited shop space + working on my limited power supply. Trust me, if i had the power and space there would be a twin turret with sub spindle at work now. As is i need a gang tooled lathe for production, but the option of stripping it off to make up some large circa 10" diamiter contoured short rollers for in house future tooling needs, ergo this will do both!Control wise, its Linux CNC. Will be programmed off line through my current cam so none of that&#;s really a issue right now. Controls will not be in the PC though, i now have a MESA 7I76e card which will handle real time events very very nicely! Currently its running the largest steppers i can get, in time it will probably get switched to servos, but again funds and such dictate a cheap get it running and upgrade later approach. All control - interface parts will use industry std stuff so i can get spares fast and easy with no OEM crap or obsolescence issues. All electrics will be IP67 enclosed, theres ample spare capacity in all cable chains for future upgrades too, oh yeah this is not some alu extrusion build of ebay either, currently we are just over - approaching the 400Kg mark with over 1/4 ton of steel 1" flat making up the key bed part :-) can't wait to find out if i over engineered it enough to get rigidity numbers to were i think they are or not? Goal was to be as or more rigid a lathe than my current 11" harrison, machine bed wise im easily at double the material mass. The beds wider (11" wide rail centre line) and all the preloaded linear rails are lovely and slop free :-) but nothing shows or destroys the ideas of rigidity like sticking a boring bar in a deep hole so time will tell on that! But its fair to say im very very hopefull.

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