How to become a millionaire: Start out with 10 million and take up machining as a hobby!
Wow - that's incredible, they were false brinelling due to fretting away without lube at the contact points,,,
picking the head up once in awhile would solve that - im just surprised the internal bearing case mounts don't also gain clearance and stuff, proof is in the pudding though if it works it works...
Last edited by Edwin Dirnbeck; 01-05-2017 at 10:37 AM.
So, as I see it, the LFV (Low frequency vibration) feature is primarily for chip breaking?
Pretty snazzy way to eliminate long stringy chips and bird nests.
HAAS has an SSV feature (Spindle speed variation) on their lathes to eliminate chatter.
Also pretty snazzy.
SSV link: HAAS SSV feature
Miyano is my favorite CNC lathe manufacturer by far. From what I understand after they went bankrupt, Citizen (yes, the same company as the watch company) moved in and took over the business and combined them into one company. I program and setup Miyanos almost exclusively.
The vibrating technology is probably just the servo oscillating the ball screw. I would think that it would be hard on ball screws over the long term.
Regarding the control - I'm amazed at how sophisticated they are becoming. Miyano and Citizen use something they call superimposition. With one turret Miyano can thread using 2 spindles threads of 2 different pitches. Or you can thread on one spindle and turn on the other. The sub spindle follows the turret, then adds or subtracts the appropriate moves to complete the G code. It's kinda wild to see. It's super easy to program - you just program each spindle as if it was single, then just apply the code and the control does the rest.
Here is a video starting at the time showing this:
".........I program and setup Miyanos almost exclusively....... It's super easy to program - you just program each spindle as if it was single, then just apply the code and the control does the rest....."
I'm in awe! I think that your idea of "easy" is considerably in advance of mine. I don't think that I could sleep at night considering all the myriad collision possibilities of those multiple spindles, axies, tools etc.
Seriously, does the LFV turning scale up to larger machines/parts' or is it limited to small parts at high revs.?
I wonder what power consumption is when they are in "pulse mode"? has to take quite a bit more power tossing a servo motor back and forth like that so many times a second and also the table...
Re: coolant through tools. We've got a 1/8" (and bigger) carbide with coolant through holes, and it's awesome. 5100rpm/15ipm into 4140 no spot, no peck, and you're left with a perfect hole for a nice tight fit for a dowel on location within a thou (or better). When we got into these high performance drills it was a game changer for us. No more spot, drill, chase/bore, ream for dowels. Just pound one of these drills in and bam, done. Perfect dowel holes (took a bit of trial/error with speeds and feeds, but I pretty much have it down now with only the occasional surprise). There really is some cool tech out there in the manufacturing world now.
I would guess that the small drills with coolant holes might start as a flat bar of larger size with two holes drilled near the edges. Then it would be drawn through dies until it reaches the size needed, perhaps also twisting it into the rough helix shape. The final operation would be machining the required shapes of the cutting edges, lands, and grooves. Larger drills might have one through hole for coolant, but the small one in the video appears to have two, and the holes probably follow the twist through the thickest cross-sectional areas.