I will never get it what gets you (mainly Americans) to use a 4 Jaw chuck for round parts...

@@Fabiable Concentric from the very beginning... this isnt a MM vs IMP thing. Its based on principle or poverty (no$ for both 3&4 jaw).

@@Fabiable Better holding power with a 4 jaw. Spin that size shaft that fast sticking out that far while facing and there's a good chance of chucking the part in a 3 jaw.

Fabian Nenning 4 jaw chucks are much more precise when well adjusted. 3 jaw chuck will always shake a little bit (around .003") so if your tolerance is thighter than that you got to use the 4 jaw chuck

@@RochCroque what a bullshit, if you use soft jaws on a 3 jaw chuck and have a workpiece with a good face and turned surface, you will get 0.00mm concentricity. And i had faced/turned the ram shaft first with hard jaws into his diameter, on the this "T" side. Then clamped on soft jaws and turned the thread and etc. Switched to clamp on the diameter and milled the other side... Time is money and you as americans should understand it the most...

Duncan Thanks for your comment. The Mazak also has what they call safety barriers (I usually turn them off). That doesn't help when your in the cam software. In Esprit TNG you are working with a accurately defined model of your machine. So it will tell you in anything is wrong down to .001" or better or what ever you define. This is particularity helpful on a mill turn doing milling on the face of a part. Many of them have limited travel in the X minus direction. (Min has only 10 mm X minus travel) So if the simulation shows you going out of machine travel in the X minus direction You can change the C axis solution or machining strategy to correct the problem. Without that you would have to find out when you run the machine. This can be as little as .0001" so without this ability in the software you can't see it in a normal simulation. If you use accurate tool models it can also do the same for tool collisions. Something the Safety barriers may not tell you.

@@EdgePrecision I seem to remember being regularly frustrated with the soft limits when I was running Mazaks. We ran all Mazatrol programs, and were pretty lax on defining the tools, so that probably didn't help.

Dru Bradley the beginning of the scene was in normal speed. The grinder is variable speed from 0-50,000 rpm. I was using a carbide burr at 40,000 rpm.

I crashed a Mori-Seiki SL 25 in the beginning of "my career" and it was enough to scare me :D

I worked for GE in the gas turbine division thay had some rather large VTLs with a 20' dia. chuck 3 rams i dont even remember what the HP was but anyway i seen a cowerker setting one up and the left hand ram was down and just alittle close to the jaws when he started the machine up it winded up and hit the jaw with a bang i can still here today and continued on to the next 3 jaws Bang Bang Bang knocking all 4 jaws clean off the chuck and into the air flying till the machine came to a stop because those machines dont just come to a stop when you hit the stop button nedless to say i gained alot of respect as to the power of those machines its a good thing it was the night shift and there werent that many people there because toes jaws landed right in an spot that people would have bin if it were day time to this day i check and dobble check and tripple check as to the clearance on any chuck that i am running

At some point everyone will crash a machine. Sadly it happens. The worst one I saw was on a bullard with a 48" chuck. Guy just wasnt paying attention and restarted the program with the tool inside the part. It blew the entire 600lb assembly out of the machine through the doors and into the floor where he WAS standing. Called that guy Usain Bolt for years. Another guy went full rapid into the spindle of a SL35 and blew the Jaws off the face. I crashed a 3" boring bar on a Mori nh6300 into an alignment pin I forgot to take out of a part for line reaming. Never feels good.

User Name I’ve been indicating parts in when we turn od’s in two op’s we blend em and send them. Forgot to handle my turret up and away when I finished indicating and went to cycle start. We ran some long big boring bars in the turret at the time and it just indexed around immediately till it met my part in the chuck. Was more scared I had to go tell boss man. Haven’t made the same mistake yet though that’s true with all my crashes lmao

Thanks. Wow you say stuff like that its liable to go to my head.

Josef Děkuji, vážím si toho.

Gracias de nuevo Tr Precision!

Norman J , Esprit's collision detection works good if the tools and holders are properly specified properly. The grinder shown in the video I've owned for over ten years. At first I resisted buying it because of the cost. It has given no trouble it is much more powerful than a small air grinder like a Dotco but a little heavier. Even at lower RPM it has power because it's constant torque.

Yes in the cam software it is possible to have a model of the machine for simulation purposes.

Thanks Frank. This is manufactured to the customers spec. They say what material. I guess a forging would be closer but the quantity is so low they probably don't want to spend money on the tooling.

@@EdgePrecision thanks for the reply and thanks again for the informative video.

I realised that too

Doug Ankrum Yes the thread was a 12 pitch. After I did my work the parts got ground than electrical less nickel plated. I think there is some API spec. That doesn't allow the hard chrome plating. But I'm not sure.

Perhaps that would work the finish wasn't critical. This just seemed easer to program my cam software doesn't do a roughing cycle that I know of with straight plunge milling. I would have to program a bunch of drilling cycles to do it. If this was something I had to do over and over say in a part that probably would be the way to go.

It is possible to set limits on tools. Typically this is called tool life management on controls. It is possible to set a time limit number of use or load and than automatically change to a alternate tool. This kind of thing is done more a higher production setting. What I have to do is pay attention to the feel and sound of the tool running. With experience you can easily tell when a tool is dull or has failed and stop the machine.

No I buy blanks and machine them. It is difficult to compete with the people that make the jaws. Often times the blanks cost not much more than the material if I made them. They must buy large quantities of the material and get better discounted prices than I can get. It just isn't worth it for me to make the blank jaws. This is also why I have a CNC tool and cutter grinder and don't grind standard end mills. The price of the centerless ground blanks at the quantities I purchase. I can't compete with big manufactures. Plus the cost of coating the tools. I only grind special tools.

Thanks.

clickblol , it's a NSK pencil grinder. Model Espert 500. www.nskamericacorp.com/product/category/Espert-500/12.

If you are asking what hourly rate I like to get. This is what I will say about that. Because everything I own is paid for I feel ok if I get at least $100.00 per hour. I usually do quite a bit better than that. if you were buying this machine new and had financing and insurance on that you would have to make at least twice that much and maybe a little more say $225.00-250.00 a hour.

raider , l had it set to 650 surface feet with a 1000 RPM limit. Thanks.

like a big brother? google translation

Bill De La Vega Yes it does. Mazak has barriers that stop the machine in Mazatrol but in a eia program these may not work. The machine has to travel in the Z axis further than this to make the tool change. So you can hit the chuck or the cabinet if the X axis is down to far before hitting the limit.

So you're loading the program from your CAM software, that is an eia program?

Bill De La Vega That's what Mazak calls a G code program. You have to save the program with a .eia suffix for Mazak to recognize it.

Thanks Chris. A carbide burr for most things. But I have used all types of tools. It can be slowed down to 1,000 rpm with constant torque. Its speed range is 1,000-50,000 RPM.

@@EdgePrecision Thanks Peter for the quick reply, I'm sorry I should have specifically asked you about the tip you use for de-burring post machining. I've been a manual machinist for 20 years, your videos let me into the weird world of CNC, fascinating stuff.

That is what I'm talking about the NSK pencil grinder.

@@EdgePrecision Thanks