troulble turning most of a sphere

[johnptc314159]

i can not seem to find a solution on how to turn this simple part 😞

i am trying a round insert using center of insert compensation.  it does not  turn a accurate sphere nor spherical sphere. and the 1 inch neck is about 1.24 inch diameter instead of 1 inch.

HELP PLEASE

[johnptc314159]

https://a360.co/2ZYguyu    how to tool and turn his part is the basic problem 😞

[HughesTooling]

The toolpath is calculated to the insert centre you have set in the tool library. How have you set the tool in your lathe? I set my tools up using Tip for compensation type.

[johnptc314159]

thank-you.  ??  will that work with a round tool ??  also how would you tool this yourself ??

many thanks john

[HughesTooling · Accepted solution]

OK didn't notice roughing will not let you use Tip as the compensation type. @seth.madore  is that by design? Also noticed a bug, if you edit the tool to Tip then change back to insert center the op still fails and there doesn't seem to be a way to fix the op after that.

@johnptc314159  you could turn on the old roughing strategy in preferences and use that instead. Or you'll need to set the tool up on the machine so the center of the tip is zero I guess.

This is the old roughing strategy using tip compensation.

Setting is here in preferences.

Mark

[johnptc314159]

i will try this now 🙂

HOW WOULD YOU TURN THIS PART ?????

thanks

[johnptc314159]

using insert center in finish mode i got this https://a360.co/3mIjuJ4  

there must better a better way....not married to this tool 😞

it seemed like the easy way................

[HughesTooling · Accepted solution]

Only time I've made some ball joints I used a tool like below and set up as tool tangent. I added fillet rads on the part to get around any problems with releaf on the trailing side of the tip.

[johnptc314159]

a million thanks for your help 🙂

[seth.madore]

Just for the record; we do have a fix in place for the previously mentioned "Tip Error". Wo hope to release it in a future Hotfix..

[johnptc314159]

great.... glad to hear 🙂

[akash.kamoolkar]

Hey guys, the issue of the toolpath not generating has been fixed in the october update.

Regards,

Akash Kamoolkar

[johnptc314159]

can you use a tool holder ??    many thanks

[akash.kamoolkar]

@johnptc314159 

Yes you can use a holder, why, are you having a problem?

Regards,

Akash Kamoolkar

[johnptc314159]

yes. using a round insert and toolholder gave just parts.  delete toolholder leave round insert and all worked, parts were very close ( haas st15 lathe)

thanks

[johnptc314159]

from another thread 

Message 20 of 32

VicKosta

in reply to: johnptc

2 weeks ago

I only glanced at all the posts and went straight for file so I can see what is going on in real time.

Here is what I learned, selecting round insert and trying to define holder in old tool library has a problem.

I cannot select custom holder and that prevents tool from being able to undercut back side.

The solution is to use round insert without the holder.

Noticed I also used 35 degree tool leading up to that conclusion.

In 99 % of my turning work I use tip tangent as that is in sink with how tools are touched off in machine.

You can also use center of round insert but after touching off tip of insert in machine you need to shift X and Z values to be in sink with programmed point.

[johnptc314159]

I only glanced at all the posts and went straight for file so I can see what is going on in real time.

Here is what I learned, selecting round insert and trying to define holder in old tool library has a problem.

I cannot select custom holder and that prevents tool from being able to undercut back side.

The solution is to use round insert without the holder.

Noticed I also used 35 degree tool leading up to that conclusion.

In 99 % of my turning work I use tip tangent as that is in sink with how tools are touched off in machine.

You can also use center of round insert but after touching off tip of insert in machine you need to shift X and Z values to be in sink with programmed point.

[johnptc314159]

other thread title   "additional cam bug @seth.madore"