rotary shoulder connections on TL-3

[CNCBoss]

I'm in the same boat as pdoherty. I do not know the Haas cycles and can only give general suggestions. I also agree that anything you can do to stiffen up your part will be a big help.

[WOLOG]

Alain,

i would say that its your insert. That on edge insert has absolutely no chip breaker which causes smaller machines problems. We have two DS&G hollow spindle lathes with 10 5/8" holes and we still have some problems with chatter every now and then. I can not stand to thread with "v bottom" style or "on edge" inserts. Especially on deep threads like IF and Regular.

I have another suggestion. Try running two threading cycles. The first one would be to remove the majority of the material. Maybe a 60 degree thread or so. Then try running your topping insert to finish the last couple of passes.

Also try an infeed on your thread. I think a G32? will work better. I will try programming a regular connection in the morning with an infeed angle and see what will happen. If I have a few minutes, I will cut one to see if I can solve the problem on my TL-2.

http://www.vardexusa.com/vardex-pdf/...erts_17-92.pdf

Check out Vardex for a laydown insert for your regular connections. I would find a laydown style insert with a positive rake on the nose.

[WOLOG]

Alain,

One more idea for the evening. Cut your connection before you machine the rest of the part. The added mass may dampen some of the vibration. Can you move your steady rest closer to the pin?

By the way, I hate cutting connections because of things like you are going through with this part. SORT OF FEELS LIKE THAT!

[DEAN]

Alain, could you do me a favor and post some detailed photos of that steady rest. How it mounts to the lathe and it overall structure. Thank you.

[alain aleman]

Originally Posted by WOLOG Alain, i would say that its your insert. That on edge insert has absolutely no chip breaker which causes smaller machines problems. We have two DS&G hollow spindle lathes with 10 5/8" holes and we still have some problems with chatter every now and then. I can not stand to thread with "v bottom" style or "on edge" inserts. Especially on deep threads like IF and Regular. I have another suggestion. Try running two threading cycles. The first one would be to remove the majority of the material. Maybe a 60 degree thread or so. Then try running your topping insert to finish the last couple of passes. Also try an infeed on your thread. I think a G32? will work better. I will try programming a regular connection in the morning with an infeed angle and see what will happen. If I have a few minutes, I will cut one to see if I can solve the problem on my TL-2. http://www.vardexusa.com/vardex-pdf/...erts_17-92.pdf Check out Vardex for a laydown insert for your regular connections. I would find a laydown style insert with a positive rake on the nose.

I used on edge inserts, i´ll be thankful if you cut a regular connection in your TL-2, send me some picture to see the cutting part.

Thank you for your time.

Alain

[CNCADEPT]

Alain,

Mi nombre es Milton Ramirez y soy Ingeniero de Applicaciones para Haas Automation, Inc. en Oxnard, California (La fabrica). E estado leyendo que has tenido algunos problemas roscando con tu TL-3. Yo con mucho gusto te puedo ayudar si asi lo deseas. Por lo pronto e estado viendo algunas de tus fotos y note que tienes usando la luneta fija y contrapunto. Tambien note en uno de los ejemplos de programas que pusiste que estabas usando RPM de 150. Con respecto a las revoluciones por minuto no se que material estas usando pero cuando hice los calculos basado en cortar material no aleado de alto contenido de carbono o sea un acero de herramienta, las RPM recomendadas son de 350 a 750 revoluciones usando una herramienta de corte de carburo de tungsteno. Habiendo dicho esto, dejame recalcar que la maquina Haas a sido diseñada para cortar preferiblemente a altas revoluciones y cargada con corte.
El otro punto muy importante que note en tu programa en la Linea de G76
(G76 X2.6544 Z-2.875 I-0.38 K0.1178 D0.022 F0.2) fue que no tienes una definicion de P1 o P3 que son las mas recomendables para este tipo de roscado. El P1 o P2 debe ir acompanado de la letra A (ejemplo A60) que indica el angulo de la rosca para que vaya deslizandose sin cortar en el angulo de atras. En fin, prueba esto que estoy seguro te va a ayudar. Hay otros settings importantes como el setting 86 y 99 y tambien la letra D en la linea G76.
Me encantaria poder ayudarte mas si lo necesitas. Por favor contacteme direct a la direccion de abajo y dile a los compañeros de el Thread este que Haas tiene excelente ayuda disponible para cualquier usuario de nuestras maquinas en Ingles y español segun la necesidad. Espero tu respuesta. Saludos.

Milton Ramirez
Applications Engineer
Haas Automation, Inc.
www.haascnc.com
mramirez@haascnc.com

[DEAN]

For us english speaking folk, Courtesy of Babel Fish:

My name is Milton Ramirez and I am Engineer of Applicaciones for Haas Automation, Inc. in Oxnard, California (it makes It). And state reading that you have had some problems threading with your TL-3. I with much please I can help you if asi you wish it. So far and been seeing some of your photos and he notices that you have using the lens fixes and counterpoint. Also he notices in one of the examples of programs that you put that you were using RPM of 150. With respect to the RPM not that material these using but when I made the calculos based on cutting to material nonalloyed of high carbon content that is a tool steel, the recommended RPM are of 350 to 750 revolutions using a tool of tungsten carbide cut. Having said to this, dejame to stress that the maquina Haas to designed to cut preferably to high revolutions and loaded with cut. The other very important point that it notices in your program in the Line of G76 (G76 X2.6544 Z-2.875 I-0.38 K0.1178 D0.022 F0.2) was that you do not have a definition of P1 or P3 that is but the recommendable ones for this type of threading. The P1 or P2 must go acompanado of the letter A (A60 example) that indicates angulo of the spiral so that it is slid without cutting in angulo of atras. In short, test this that I am safe is going to you to help. Settings like setting 86 and 99 are important others and also letter D in the G76 line. Encantaria me to be able ayudarte but if you need it. Please contacteme direct to the direction of down and dile of the companions of the Thread this that Haas has excellent aid available for any user of our maquinas in Ingles and Spanish segun the necessity. I wait for your answer. Greetings.

[CNCADEPT]

Dean,

Thanks for the translation, I focused on helping our friend Alain in his native language and forgot about how important this forum is to a lot of people, since it could easily be the only source or contact with technical people or advice. I am in contact with him directly already via email. Babel Fish does not do a good job when it comes to technical terms so from now on if and when I reply to threads I will write in both english and spanish if its neccesary.
Thanks again and please do not hesitate to give me a call or send an email if you were to have any questions or need of assistance with your Haas products. It is my Job to assist the customer to achieve their production goals and use the Haas machine efficiently.

Regards,

Milton Ramirez
Applications Engineer
Haas Automation, Inc.

[DEAN]

Hey Milton, I am glad that there are members from HAAS here to answer questions. Babel Fish does do a pretty weak job on tech terms.

Question: Why doesn't HAAS have a official forum??? It seems like it would be VERY easy for a company like HAAS to set one up. Look at it as a just another tool in their customer service. I know there is the 'Answer Man' but it would allow users to meet.

[CNCADEPT]

Hi Dean,

It is a good point that I am sure our marketing department has considered. I think the reason why it does not happen is because it would take away from our personalized customer service which is our goal. Forums for the most part are very casual but sometimes are also used as a debating platform which is something we are definetely not interested in doing. We also have a very strong network of local dealers to whom we direct our customers to so that the support is localized, personalized, quick and effective. Also, the workload is distributed per region worldwide. A forum might still be something to consider in the future.

Regards,

[Geof]

alain;

I suggest taking the Steady away and moving your threading tool to the other side of the toolpost. This will allow you to move the saddle closer the the chuck and move the Tailstock so your center is not hanging out as far. Also as someone suggested use a deeper center hole and a shorter center.

[Chuck Reamer]

I have tried to cut Rotatry shoulder conections on a TL-3W, using a heavy duty steady rest with the tailstock in and had the same problems. The tailstock, steady, toolpost and entire saddle would shake, rattle and roll.

The really experienced guys in the shop gave me there 2 cents and I tried every depth and rpm combo, but it would still end up full of chatter. We had a tooling tech rep from Kennametal and all of his ideas wouldnt work either.

We solved the problem buy doing them in a big bore SL-40, so we could chuck as close as posible. Even with that there is still slight chatter issues, there is just so much thread ingagement going on.

The shop manager was not very pleases, thats what the TL-3W was bought for and it cant do it worth a crap.