VERICUT Users' Forum

p-cnc

Member

From: Toronto, ON

Registered: 2004-11-11

Posts: 36

V6.2 Simulate Tapping

Hi all

Does Anybody try "Simulate Tapping" ?

http://cgtech.com/usa/products/about-ve … e/#Tapping

How it work and where can I get it to work. I didn't see any option in Vericut 6.2

Thanks

jsmillett

Member

From: Chatsworth, CA

Registered: 2005-02-25

Posts: 42

Re: V6.2 Simulate Tapping

Try tapping.vcproject in the Vericut samples directory.

There is a new tool type: Tap.  See tool file.

Read about Tapping tools in Vericut Help.

Jerry

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Jerry Millett

p-cnc

Member

From: Toronto, ON

Registered: 2004-11-11

Posts: 36

Re: V6.2 Simulate Tapping

Thank Jerry,

I will try it out.

____

Tim Johnson

Member

From: Saint Joseph MI

Registered: 2006-06-02

Posts: 22

Re: V6.2 Simulate Tapping

The "stack" command is greyed out when I add a tap tool along with a holder and also the auto gage length doesn't seem to be working for me. Is there something special I need to be doing?

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Tim Johnson
CNC Programmer
LECO Corp.
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VERICUT 7.0.3 (64)

paehv

Senior Member

From: Eindhoven, Netherlands

Registered: 2005-01-17

Posts: 167

Website

Re: V6.2 Simulate Tapping

I'm also having trouble getting the tapping tools to work.
There is no Vericut Help on tapping tools, or at least I can not find it.

How do we have to deal with tapping tools that are mounted in a flexible tapping head.
The tap feeds in with a feed/rev equals pitch. At the depth the spindle is reversed and the tap is feeded out with feed/rev equals 1.1 x pitch.

When simulating this Vericut gives an error when the spindle is reversed.
Error: Tool spindle spinning in wrong direction for tool "513"
and a error when feeding out.
Error: Tap cycle feed advance "1,65" is incorrect for tap tool "513" ...

Is there a way to correct this?
If not, than we would have to leave all our taps defined as drilling tools.

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Patrick Delisse
KMWE Aerospace -  https://www.kmwe.com
(Vericut V9.5, Siemens NX2206, Campost)

jsmillett

Member

From: Chatsworth, CA

Registered: 2005-02-25

Posts: 42

Re: V6.2 Simulate Tapping

Pat,

See this thread. 

http://cgtech.com/forum/viewtopic.php?t=945

I had the same question.  BillH set me straight with his reply. 

The "Lead Tolerance" addresses this need. 

Jerry

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Jerry Millett

paehv

Senior Member

From: Eindhoven, Netherlands

Registered: 2005-01-17

Posts: 167

Website

Re: V6.2 Simulate Tapping

Jerry,
Can you copy paste the BillH solution here. The topic you are referring to can only be read by users with special access???

I found the lead tolerance and this solves the 2nd error I had.

The 1st one "Spinning in the wrong direction" when tap goes out of the hole stays. Any ideas on this.

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Patrick Delisse
KMWE Aerospace -  https://www.kmwe.com
(Vericut V9.5, Siemens NX2206, Campost)

jsmillett

Member

From: Chatsworth, CA

Registered: 2005-02-25

Posts: 42

Re: V6.2 Simulate Tapping

Pat,

Add a new TAP tool.  Notice the "Lead Tolerance" field that I mentioned in my previous post.  This field allows you to specify a +/-% tolerance to the feedrate. 

If you have a Tap with a Pitch of 1mm and you use a feedrate of 1.1MMPR then the "Lead Tolerance" has to be at least 10% to allow for the higher than nominal feedrate.

Bill Hasenjaeger gave a more eloquent explanation in the Vericut 6.2 Beta tapping thread:

There is a "lead tolerance" setting in the tap tool parameters in tool manager. This is a percentage value that allows the feed rate "lead" to vary from the tap tool "pitch" by the % without generating a lead/feed error. It has no effect on the geometry created by the tapping operation.

Following is from my original design spec:

The error check for tap lead vs. feed rate needs a tolerance, specified by the user. I suppose we can express this tolerance by a % of lead (even though it really is the distance the tap can “extend” and “compress” relative to the tool axis when tapping). A % is easiest to enter. I suggest adding a % “Lead tolerance” field to the tap tool parameters. The default is 0. A 1% “Lead tolerance” allows a feed rate +/- 1% of theoretical without an error.

The tolerance is needed because the tap may be held in a “floating” holder, or the spindle doing the tapping may “float”. “Float” means the tap tool can move up/down along the tool axis while tapping. “Floating” allows the tap to pull itself into the hole by virtue of the cutting action. Exactly how a wood screw pulls itself into a piece of wood when turned.

The amount the tap “floats” depends on the floating mechanism. Some only float a millimeter or two. Some float as much as 20 mm or more. Thus the NC program may have a feed rate slightly less or more than the tap lead, and work perfectly fine. In any case, the floating action does not affect the simulation or resulting tap feature. This only affects when the lead/feed error message displays.

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Jerry Millett