Excellent work. Just watching this makes me wanna spend some serious money on a mini lathe.
I don't see any mechanical locking devices in your design. I supose you keep the stepper coils energized to secure the position of the dividing head. Is that secure enough? Could you loose step count by accidentally turning the dividing head?
The calculations is done in 16.16 binary, that is in 0.0000152 steps. Therefore the absolute error is non existent. However, there is a relative error per divition of -0.5 to 0.5 steps. The gearing gives 1200 steps per rotation, so this is no problem unless you go beyond about 200 divitions. In short, it works fine :-)
As to your question about cutting a proper involute gear tooth profile, you have two choices. Either buy a gear cutter and replace your single tool bit with it, or use a pantograph to trace an involute curve and grind the curve into your tool bit. Possibly a third choice would be to use a wheel dresser to shape a grinding wheel into an involute form, and then grind your single point tool bit with it.
The idea is good but I thnk it needs a reduciton gearbox or arrangement of some sort because it will become quite inaccurate as the desired divisions move closer to the actual step size of the motor and when the divisions are not exact multiples of the step size of the motor. Rounding will become a serious issue.
With a little work, this can become a really great device though. Keep at it!
horrible way of cutting...
danielpineda1289 4 weeks ago
Nice set up. Any Insight on how to build one? Please!!!
fourxblz 2 months ago
Excellent work. Just watching this makes me wanna spend some serious money on a mini lathe.
I don't see any mechanical locking devices in your design. I supose you keep the stepper coils energized to secure the position of the dividing head. Is that secure enough? Could you loose step count by accidentally turning the dividing head?
Seremis 1 year ago
Hello
Very nice work. Do you have any plans for the electronics?
lynnfredwoods1 1 year ago
Är ett sådant kugghjul billigare än i handeln?
salmiak911 1 year ago
Bra jobba!
futurepartyboy 1 year ago
Comment removed
ivanov3000mltk 2 years ago
very nice assessory good demo
tvicena 2 years ago
Love it - I was looking for a manual dividing head but this is better. Do you have any plans available to make my own? Thanks.
toolsriatgmaildotcom 3 years ago
The calculations is done in 16.16 binary, that is in 0.0000152 steps. Therefore the absolute error is non existent. However, there is a relative error per divition of -0.5 to 0.5 steps. The gearing gives 1200 steps per rotation, so this is no problem unless you go beyond about 200 divitions. In short, it works fine :-)
KapteinKUK 3 years ago
Hello I see.
@1200 steps per revolution gives us 0.3 degrees per step. That will cerainly be good enough for smaller gears and it will work fine:-)
However, for a gear of say 150mm diameter,the accuravy/error will be ~0.2mm.
I still think this has potential and I will investigate further to see if I can make one like it but with a bigger gear ratio.
Have you made any proper gears with it yet?
berntd 3 years ago
Yes, I have made several tooth belt gears, look in my video list.
I agree that more steps will be better. Give me a line if you make someting.
KapteinKUK 3 years ago
As to your question about cutting a proper involute gear tooth profile, you have two choices. Either buy a gear cutter and replace your single tool bit with it, or use a pantograph to trace an involute curve and grind the curve into your tool bit. Possibly a third choice would be to use a wheel dresser to shape a grinding wheel into an involute form, and then grind your single point tool bit with it.
Randy
drocketman2000 2 years ago
The idea is good but I thnk it needs a reduciton gearbox or arrangement of some sort because it will become quite inaccurate as the desired divisions move closer to the actual step size of the motor and when the divisions are not exact multiples of the step size of the motor. Rounding will become a serious issue.
With a little work, this can become a really great device though. Keep at it!
berntd 3 years ago
great job
TOBIN250 3 years ago
That's great! Hat's off!
zubernick 3 years ago
Steel? or aluminium? I like your machine a lot!
snipperwolf73 3 years ago
énorme, vraiment énorme...
suprapouce 4 years ago
wow soo good
Jimmypage512 4 years ago
wicked :D
ffddffdss 4 years ago
nice!
sbc350 4 years ago
that is beautiful
JM27975 4 years ago
Nice machine!
"If you know what a dremel tool is, you are probably one of my subscribers" -The Fabricat
AmericanFabricator 4 years ago