Best process to level my 2017 ST10

[angelw]

I had the tail stock of a Daewoo Puma lathe off for refurbishment recently. Oil to bearing face of the Gib was via hole drilled through the Gib (back surface to bearing surface), with an 8mm wide by circa 40 long, shallow slot cut in the back surface; the through hole was position at the slot's mid length. Obviously, the 40 long slot was to accommodate the varying longitudinal position of the Gib over time; where just a through hole would be unlikely to line up with the outlet from the oil gallery. The through hole in the Gib exited on the bearing side mid point of a distribution track cut in the bearing face of the Gib.

This design of conveying oil from the oil gallery to where its required at the bearing face of the Gib is fine, provided that the hole and slot are machined in the correct position. A Gib is assembled with it's mating parts in only one way. The through hole and slot were machined so far out of position that no oil whatsoever would make it into the shallow slot and then through the hole to the bearing surface. Accordingly, no oil would have made it to the bearing surface at any time since manufacture of the machine; it seems like the hole and slot location were dimensioned from the wrong end of the Gib. Given that this part had all the looks of a CNC machined component; slot and hole with a uniform chamfer etc., I suspect that many, if not all, machines of this type made around the time of manufacture of this machine, would have been the same.

Regards,

Bill

 

[Vancbiker]

It’s a Daewoo so things like that are the norm.

When I worked for a dealer that sold Daewoo, all of us in the service and applications group called them Daewhoops because of all the mistakes and incorrect things we found on them. We all were much happier when the sales group sold a Yang (Taiwan) lathe over a Daewoo to a budget shopping customer. The Yangs had far fewer problems during and after install.

 

[Kustomizer]

These machines we use today are largely unchanged for many years, they are somewhat faster but mostly the same machines, one would think the bugs would be out of them by now

 

[Vancbiker]

You would think so. Daewoos in the 80s and 90s were reasonable designs in some cases but the real trouble was in the execution.

Got one of their HMCs in once with high pressure coolant. The high pressure coolant would not turn on when the spindle was running but would turn on with the spindle stopped.

 

[Herding Cats]

Got one of their HMCs in once with high pressure coolant. The high pressure coolant would not turn on when the spindle was running but would turn on with the spindle stopped.

Little oopsie in the ladder

 

[Vancbiker]

Little oopsie in the ladder

Gave one a lot of faith in how well thought out and tested the rest of the ladder was!

 

[Spruewell]

Lubricant technology has changed a lot over the last 100 years. And thank goodness or you would be packing the bearings on your machines with talo and lard two to three times a day. Not to mention that many lubricants that were developed have now been deemed hazardous to the environment (and people) and thereby evil.

 

[Kustomizer]

I cut a slot in the wall and my job box rack to poke my barfeed tube through and made a shaft to hold the clamshell to the stand, the stands and clamshell came from an old Miyano BNC 34 that had a bracket on the end of the machine and a stand for the other end of the barfeed.
I clamped an LED flashlight in the chuck shining through a 3/4 spindle liner and turned on the spindle at 20 rpm to make a spot on the wall for my holesaw, the wall cut easy, the job box rack, not so much, seems the guy that builds stuff around here tends to use more metal than is likely needed.
An old man told me once "never build something when your 30 that you will have to fix when your 60 because you aren't going to want to". I took that pretty well to heart and cuss at myself for it sometimes as modifying something I built when I was in my 20;s when I am in my 50's ain't much fun either.
Originally the Miyano had a strange cable system to push the bars into the machine that was always a PITA so we have been pulling bars which works well for us. Floorspace in our new shop is somewhat smaller and as a result things are a bit more condensed than before, 2000sf from 7000sf. The barfeed tube and stand will be in front of my compressors, if I need into them I can take out 4 bolts and the barfeed tube can slide through the wall and out of the wayish. The tube is 2 1/2 OD x .312 DOM tube and I will be making a new tube for my other lathe so they can share liners, I will have to make those as well.

 

[Kustomizer]

That's done, I still need to make the liners but I am waiting for some o-rings to show up

 

[Mike1974]

O-rings for? Spindle liners? Just a word of caution, we ordered one that was supposed to fit our ST20Y. It had O-rings on it, slid in half way and jammed up. Had to use the B axis to push it out! O-rings off, fit perfect.

 

[Kustomizer]

O-rings for? Spindle liners? Just a word of caution, we ordered one that was supposed to fit our ST20Y. It had O-rings on it, slid in half way and jammed up. Had to use the B axis to push it out! O-rings off, fit perfect.

The spindle liners I made for the old Miyano are like this and they slid in and out real nice, they can be pushed in and out with one finger though 2 years laying out in the dirt didn't help them.

 

[Mike1974]

The spindle liners I made for the old Miyano are like this and they slid in and out real nice, they can be pushed in and out with one finger though 2 years laying out in the dirt didn't help them.
View attachment 1286
View attachment 1287

I see. Ours are extruded plastic.

 

[Kustomizer]

I see. Ours are extruded plastic.

I have those inside the spindle but I have to make the 9 footers for the barfeed itself for the smaller sizes, the larger sizes I slide in a piece of PVC pipe or conduit.

 

[Spruewell]

I made similar liners for my Miyanos using nylon bushings that I shrink fit onto the tubes. I added o rings to the last bushing to help keep it from walking out

 

[Machtool]

You have to be cautious, especially on some thing like a Miyano. The rings will be JIS standard. Cross Section will be 3,1mm instead of 3.53mm
Regards Phil.

 

[Kustomizer]

I made some bushings and put a few barfeed liners together, 1/2, 5/8, and 3/4, I put a 3/8 PVC hose in the 5/8 to use for 1/4 and smaller.
I have a small sholder on the machine end and I let the last one go through so the groove shows, I put a 1/4" larger o-ring so the liner can't walk out the front.