chrisg3103
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- 783
Evening, not been about much here since my last 280 VS, so now i have another thought i would put up a post and maybe help some folk who are encountering the same issues!
Made a bit of a mess of the last one and sold it at a loss in the end, so bought this one cheap knowing its a bit rough so nothing much to loose, will be trying some unorthodox things, but hopefully wont upset too many purists so, to the machine:
This was it before the chap selling it removed it, from a school... some folk think school machines are great, but kids are not known for their mechanical sympathy or finness. So its a bit of a dog
I have had one of these machines before so was aware of the plastic back gear, and what can happen to them so took the cover of the headstock before cash changed hands, oh dear
But combined with a few other issues, like the cabinet handle having got snapped off between the school and the guys garage, the gears in the screwcutting gearbox being slightly grazed, bed being dinged up from dropped chuck changes, and a fair amount of backlash and rust.
Paid just over £300 so not too bad, so loaded it up and towed it all the way home from some place near Banff, very hairy on the lumpy bits.
How (not) to unload a lathe single handed at 9PM, crane leg between trailer wheels, lift lathe clear of trailer, take offending wheel off.
Then wheel three wheeled trailer away and lower lathe onto crane
Note the green pallet wrap tie to stop it swinging round, bit of health and safety and my patented anti slip rubber backed door mat on the trailer, works great if you have a metal deck to stop metal on metal sliding.
Safe inside at last, some rearranging needed.
So, to work, first bought a super cheap 2.2KW inverter. To wire this motor up to Delta there are instructions on the terminal cover plate, need to move wires rather than links, but wired it up and hoped for the best! was bought as untested, so after everything else wrong with it wouldn't surprise me if the motor was pumped
Inverter worked a treat, am super impressed with it and its control functionality, that will be coming later. No load test or whatnot, was a very heath robinson rig just to test, but it did highlite the horrific noise from that back gear! and its so chewed up it wont engage high range, guessing thats why there is a cable tie on the selector handle, to hold it in gear.
Put that to the back of my mind and set about an idea to resync the screwcutting gearbox, as i had removed the cover to check for damage.
These are notoriously difficult to properly align, as you cant see anything when the cover is on! So took some measurements and made a 3D printed cover, with a dirty great hole in it.
trick will be to get everything lined up, then remove the cover without disturbing anything, then fit the actual cover, without disturbing anything. At leat it will give me a fighting chance!
But the back gear was annoying me, so i did this
Spindle came out remarkably easy, hardest part was removing the back gear shaft.
Courtesy of the Denford forums i found the original engineering drawing for the gear
And after a lot of farting about i managed to 3D model it,
First atempt at 3D printing it didnt go too well, so edited the model to do away with most of the recess on the back, its only there for the gears retaining nuts, so made holes that a thin box spanner might fit into.
Very fancy, printed it, sizes came out a bit small on one diameter from the printer, maybe shrinkage due to the size of the part. But in all a great success! tooth form is a perfect match to the original.
(The odd pastern on the edge of the teeth is the printers version of a 15 degree chamfer)
And thats a few weeks work on one post.
Idealy id like to find someone to cut a new gear for me, i have made a few enquirys but noting solid yet, its very tempting to try a 100% infill print and see what happens
All gear cutting offers welcome
Made a bit of a mess of the last one and sold it at a loss in the end, so bought this one cheap knowing its a bit rough so nothing much to loose, will be trying some unorthodox things, but hopefully wont upset too many purists so, to the machine:
This was it before the chap selling it removed it, from a school... some folk think school machines are great, but kids are not known for their mechanical sympathy or finness. So its a bit of a dog
I have had one of these machines before so was aware of the plastic back gear, and what can happen to them so took the cover of the headstock before cash changed hands, oh dear
But combined with a few other issues, like the cabinet handle having got snapped off between the school and the guys garage, the gears in the screwcutting gearbox being slightly grazed, bed being dinged up from dropped chuck changes, and a fair amount of backlash and rust.
Paid just over £300 so not too bad, so loaded it up and towed it all the way home from some place near Banff, very hairy on the lumpy bits.
How (not) to unload a lathe single handed at 9PM, crane leg between trailer wheels, lift lathe clear of trailer, take offending wheel off.
Then wheel three wheeled trailer away and lower lathe onto crane
Note the green pallet wrap tie to stop it swinging round, bit of health and safety and my patented anti slip rubber backed door mat on the trailer, works great if you have a metal deck to stop metal on metal sliding.
Safe inside at last, some rearranging needed.
So, to work, first bought a super cheap 2.2KW inverter. To wire this motor up to Delta there are instructions on the terminal cover plate, need to move wires rather than links, but wired it up and hoped for the best! was bought as untested, so after everything else wrong with it wouldn't surprise me if the motor was pumped
Inverter worked a treat, am super impressed with it and its control functionality, that will be coming later. No load test or whatnot, was a very heath robinson rig just to test, but it did highlite the horrific noise from that back gear! and its so chewed up it wont engage high range, guessing thats why there is a cable tie on the selector handle, to hold it in gear.
Put that to the back of my mind and set about an idea to resync the screwcutting gearbox, as i had removed the cover to check for damage.
These are notoriously difficult to properly align, as you cant see anything when the cover is on! So took some measurements and made a 3D printed cover, with a dirty great hole in it.
trick will be to get everything lined up, then remove the cover without disturbing anything, then fit the actual cover, without disturbing anything. At leat it will give me a fighting chance!
But the back gear was annoying me, so i did this
Spindle came out remarkably easy, hardest part was removing the back gear shaft.
Courtesy of the Denford forums i found the original engineering drawing for the gear
And after a lot of farting about i managed to 3D model it,
First atempt at 3D printing it didnt go too well, so edited the model to do away with most of the recess on the back, its only there for the gears retaining nuts, so made holes that a thin box spanner might fit into.
Very fancy, printed it, sizes came out a bit small on one diameter from the printer, maybe shrinkage due to the size of the part. But in all a great success! tooth form is a perfect match to the original.
(The odd pastern on the edge of the teeth is the printers version of a 15 degree chamfer)
And thats a few weeks work on one post.
Idealy id like to find someone to cut a new gear for me, i have made a few enquirys but noting solid yet, its very tempting to try a 100% infill print and see what happens
All gear cutting offers welcome