Thanks Bob.

Thanks for watching Guy. Much appreciated.

Agreed. Joe takes something that would fill chapters in book and in 12 min gives a clear picture of what is going on, home to

I love it.

Great. Once the fog is cleared, its not so scary.

Glad it was helpful!

Thanks. Had a personal item to take care of. All is well now. Good to be back.

The models really help. Thanks for watching.

Lathes on ships have 3 feet, so no matter of the level it will never bend.

Thanks for watching Troy.

Excellent. Thanks for the support.

The hinge point is probably more of a bow point, but the end result is the same. Hawaii was beautiful. I'd like to go back someday under different circumstances and do some diving. Kona night Manta ray dive ----- Bucket list.

Plus they settle over time. Mine actually sits on high density rubber machine mounts.

@@joepie221 LOL, you have it easy. My shop floor is the usual wooden construction. I can get my smaller lathe than yours to turn perfectly parallel and two hrs later with a few changes in humidity or temperature it's turning a measurable taper. So I've had to do a whole lot of adjusting over the years. It's taught me a lot about that "lathe leveling" but the problem is obviously something I'd rather not have.

I love these lathes. I have run many and they all perform great. the 15" is my favorite.

Excellent. Good luck and have fun.

Anything pinched between centers shouldn't show much difference as demonstrated. Don't rule out way or tailstock wear. if you want to tram the tailstock, do it with a long bar and indicator in a chuck. Don't use a bar that will sag.

I bet this helps. Good luck.

Glad it was helpful!

Precisely correct.

Glad you like it.

Its quick and effective.

The will be slight exceptions and maybe some bowing, but overall the boxes really represent whats going on. Thanks for watching.

As long as the lathe is sitting on a surface rigid enough, it should be fine. If the machine is heavy enough not to walk around, or fall over on top of the cabinet it should be OK.

Glad you found it. Greetings from Austin Texas. I hope to earn your subscription.

@@joepie221 for sure!

Agree. In Sweden we talk "technical surfaces." Some take pressbrake tooling, use the outside as distance blocks and I tell them they are not true. They say they are true to the thousands and they are but only on the technical surfaces.

I'll probably go back for the Kona night manta ray dive. Its a bucket list item for me. Look it up on KZfaq. Amazing.

I ran an 18-140 gap bed Mazak for many years. It had a center island on the bed because it was so long. Imagine how that came into play for the guys that set it up.

@@joepie221 I never got to see them but my father set up old ww2 lathes that made the barrels for big war ships when he worked with the dep of defence. That would have been one interesting experience.

On large CNC machining centers, the head is fixed and the column is rigid. You actually have to tweek the level of the table with the machine feet to indicate the spindle. reverse procedure, but the only way to do it.

There is a long list of different kinds of design when it comes to machine tool machinery. The good ones are heavy and rigid with a properly built foundation and no soft feet. I'll take an old American design like a Producto, Gray or Cincinnati Milicron that has replacable ways over anything imported with ways machined out in the frame like a Mazak Y, or YB. Too bad that most domestic machine tool makers have been sold and no longer in operation. I look at it from maintenance prospective because thats what I do for living. Older designs are easily upgraded with modern controls, but sometimes the people who make the decisions to purchase equipment don't have a clue what's good.

"Which it wont be but test if you wish, at least you will know"... "There is no reason to worry about a test bar deflecting from it''s own weight"... Do they omit tuition on the subject(s) of Airy and Bessel points at engineering colleges nowadays? At the very least, you must have had the Airy points on a precision straight edge pointed out to you in the metrology / mensuration module? Deflection's real, but often immeasurable and immaterial in the normal workshop. www.engineeringnotes.org/metrology/airy-points-and-bessel-points/ Most of us spend our lives in "normal" workshops, but if you visit places where gas or steam turbines are made, or car components, or gauges such as Johansson blocks, or antifriction bearings, or precision machinery, or gauging systems are made, where temperatures, air quality and humidity are closely maintained, and where even fifty and more years ago, air gauging systems were measuring to millionths of an inch www.qualitymag.com/articles/88856-quality-101--all-about-air-gages Your flat surface? how flat? Guys use ground plate, assuming it's flat, forgetting or not knowing it won't be, as can be proven with a diffraction grating interferometer... Energize and clock a magnetic chuck or table with a tenths clock in both planes, at 1/2" intervals It'll not be flat. Surface plates and marking plates are often confused (unless you get the bill, and see the huge difference in price...) Your mandrel? (bar) how round? It's a surprise when the Talyrond is applied to a newly ground, "perfectly round" workpiece, and you find the trace is like a ploughed field... It's all a matter of degree, but awareness of the more esoteric engineering phenomena can make a huge difference at interview if you're seeking a move into a better class of engineering work (which may be a retrograde move, causing more headaches and paying less) I was aghast at the rate I was offered for toolmaking work, in the seventies, so I took a job on maintenance. Rough and dirty, but the pay and freedom from stress...

@@robertlawson8572 We have a winner. LOL

Thanks Steve.

Headstocks aligning on the Vee are the suck. level the bed to remove any twist. Put a 3" diameter aluminum pipe 14" to 16" long in the 4jaw, and make test cuts with a shear tool, and measure the diameter at both ends. If you need to align the head stock, keep in mind it will shift when the bolts are loosened. So put an indicator at either end of the tube before loosening the bolts. Once the horizontal alignment is complete, sweep the top of the tube to verify vertical alignment. I disagree with Joe on the importance of vertical alignment, it has to be way off before it has a meaningful effect on the taper. This is just simple geometry. Fire up Fusion 360 and check for yourself. For example, if the headstock points up 0.050" at 12", the result will be about 0.0008" taper. The smaller the diameter the bigger the affect. 0.015" mis-alignment will give about 0.0009 taper.

Please point out at which part of this video, I said vertical alignment wasn't important. i think you misinterpreted something.

You addressed vertical alignment very well. Not discussed was the use of jacking screws to shift the headstock front to back. I know hoe to do it with a 2 collar test bar held in the chuck. I am betting there are a lot of viewers who could have benefited from that discussion.