Same

it's too confusing

Same here

which nakamura tome ? what year?

Yeah, a lot of initial fine tuning but once everything was set it was actually pretty fast to set up for different crankshaft models.

Yup. I didn't notice that the camera was upside down until close to the end of the video.

Lol didn't even notice. I was concentrating on everything else. Nice catch.

Jesus 😂😂

Lol

A ps5?

Thank you very much for the appreciation, a lot of work was put to optimize the cycle! The pulsed high pressure coolant was just for video, but the turning can actually be performed without coolant with this material.

Why not just use coolant through carbide, no peck needed.

imagine the crash tho

Been there, Done that.

Magnificent machines... very swift tool indexing and high precision machining...

Me too. But on a turret only machine there is no way for such an operation.

Brad Davis why ??? It’s exactly the same as any other machine you work in XYZ just in different work offsets ??

@@chrisyboy666 yes cuz but also the other axis as well, not to mention that the workpiece needs to be trammed to each axis and this like at least 5 axis. I have only been doing CNC for 6 months so I have much to learn.

Brad Davis I’ve been doing it for 17 years and I have much to learn. Best thing about this profession is you never stop learning.

Brad Davis lathes like this are not as bad as you think at first, not to diminish the work involved or the cool process. I’ve never ran a Nakamura, but on a Mazak you’d just program two 4-axis lathes and add wait codes so one turret doesn’t move past whatever point until the other turret has caught up. If you put two wait codes in a row, it guarantees only one turret operates at a time. When you’re proving out a new program, you have a switch to make it so you can start and stop the turrets individually.

Looks like the work offset was set by the probe in Z and the rotation in Z at the beginning of the program. The tools I'm sure where set by a tool setter. All programmed so operators not machinists can run it.

And tons of wasted stock

TimSoKar How did you make it

Lots of different machines. Each machines are processing just one step of the machining cycle. The steps are not in the exact same order too. So, one crankshaft is made every minutes but it takes nearly 30 minutes for a crankshaft to be made.

Based on the fact it’s a cast crank I wouldn’t think this is for a car. It’s a 2 or 3 cylinder by the look of the journals. Maybe industrial equipment or small diesel crankshaft. So that’s why the tolerances are probably less and the machining is faster.

Lots of cast cranks in automobiles.

Thank you. Nakamura has a feature called Navigator, so as you said it basically acts like a probe, but with physical contact. You measure the torque of the motors, in this case the C-axis, so when you make contact you record the C-axis position as you pointed out. Same concept for Z-orientation!

@@Ds3DeniS3Ds never seen done this before. Really cool :)

@@jonnis240 I have to agree, its definitely an interesting way of locating. Whats more interesting is it probed the rod journals, but never machined anything eccentric. Just a bunch of interrupted concentric cuts.

@@MoistGrundle There was the hole pattern on the end and the side milling cut which probably needed to be oriented.

or if one of the tolerances is out, a money wasting machine =D

Aaron Henderson lol try the Haas crap I work with.

It kind of threw me off for a second before I noticed the video is upside down.

@@Welcometofacsistube I started off on a couple haas st10's straight up 2 axis extremely basic machines, no tail stock no live tooling no insert tooling. Best thing I ever did was get the hell out of that shop and please keep in mind that I'm only 3 years deep into this trade

kzfaq.info/get/bejne/rbmTgJN7lZusYHU.html here it is. Although there is an intermediate step in which the rod bearing journals get machined.

or at least an air blast to clear the debris- lol

What?

@@lehonwhale8070 Что?

underrated

Егор Кузнецов чистовая обработка болванки-отливки. Круто!

Mainly for the video, although it's not too critical to use coolant to perform turning of spheroidal graphite iron in comparison to other materials.

Carbide.

No...it was all being done manually...couldn't you hear the guy winding the handles? SMH

@@Penguin_of_DeathIs there an orchestra conductor that reads the G-code and keeps everyone synchronized? There were at least two guys winding the handles. The synchronization was amazing when they were moving both tool holders at the same time. With all of the stuff going on, I am guessing that there may have been a third operator controlling the coolant flow and the tool changer. Clockwork precision. Truly amazing.

@@Penguin_of_Death lol