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OD Taper Wizard Help Needed
« on: June 28, 2011, 12:41:21 PM »
Hi Guys,

I recently got my lathe set up, but am having problems using the OD Taper Wizard.  I'm trying to put a 45 deg taper (90 degree included point angle) on a 1" diameter rod.  The wizard seems to want to make a taper with the wrong angle.  It's making the angle very blunt, or flat.  The odd thing is that the display of the toolpath looks right.

What I'm looking for is a point on the end of the bar, that goes from a point all the way to the outer diameter (no step).

The specifics:
I am a licensed user.
I am using Diameter mode.
OD Taper settings are as follows:

X End:  0.0
Angle:  +45.
X Start: .5
Z End: -.5
Z Start: 0.0
Clearance: .1

I have no idea what I'm missing.  Any help would be greatly appreciated!

Mr. Technical

Offline Hood

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Re: OD Taper Wizard Help Needed
« Reply #1 on: June 28, 2011, 01:52:51 PM »
Does your lathe cut accurately normally?
Can you attach your xml please.
Hood

Offline mr.c

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Re: OD Taper Wizard Help Needed
« Reply #2 on: June 28, 2011, 02:21:22 PM »
I have had some issues with wizards. In particular, direction of cut. I am looking at your settings and it looks,to me (I may be wrong) that with x end at 0.0 you are wanting it to cut to the center of your stock. But your z end is at -.5 which is moving the other direction? Or am I really confused?
Sometimes the wizards are really confusing to me(not particularly intuitive) and sometimes they just will not do what I need them to do and I have to write my own code.
« Last Edit: June 28, 2011, 02:32:10 PM by mr.c »
Re: OD Taper Wizard Help Needed
« Reply #3 on: June 28, 2011, 03:29:59 PM »
Hood:  Still figuring out if there are problems with different types of cuts, but 1" of commanded Z movement equals 1" of actual Z movement, and same thing for the X axis.  That was one of the first things I looked at (steps per revolution).  XML attached.

mr.c:  Thanks for the input.  Z zero is the face of the part, and X zero is the center.  X .5 is with the tool touching the side of the 1" diameter barstock, since I'm in Diameter Mode.  Z -.5 is half an inch from the faced end of the part (towards the chuck).

Also, I'm attaching the g code that running the wizard as stated produces.

Mr. Technical

Offline Hood

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Re: OD Taper Wizard Help Needed
« Reply #4 on: June 28, 2011, 03:57:08 PM »
When I try with your xml it works fine for me according to code and toolpath but when I load the code you posted it is not correct. Can you take a screenshot of the settings you have in the wizard just in case I am doing something different.
Hood

Offline mr.c

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Re: OD Taper Wizard Help Needed
« Reply #5 on: June 28, 2011, 04:45:35 PM »
The way my mind see's it is perhaps why it is not intuitive to me. I understand the positions of x0 being the center of the stockand x.05 being the diametric edge of the piece and z -.5 being a half inch back from the face. It is the start and finish that confuses me. My mind pictures it this way. With a taper to start at x .5 and finish at x 0.0 the tool moves left to right. And to start at z 0.0 and finish at z -.5 is a right to left move. In reality that may not be the intention of the wizard but it is how my mind pictures it, which makes it counter intuitive to me.

Offline ERP

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Re: OD Taper Wizard Help Needed
« Reply #6 on: June 28, 2011, 04:50:50 PM »
Ignore wrong thread
Re: OD Taper Wizard Help Needed
« Reply #7 on: June 29, 2011, 10:45:28 AM »
Here's the screenshot showing how I've filled out the fields.  Thanks for all the help!

Mr. Technical

Offline Hood

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Re: OD Taper Wizard Help Needed
« Reply #8 on: June 29, 2011, 01:49:44 PM »
I get totally different code than you get from the wizard with your settings and xml, have attached what I get, can you load that and see what its like. BTW heres a screenshot of what I get when I load the code you posted.
Hood
Re: OD Taper Wizard Help Needed
« Reply #9 on: June 29, 2011, 02:36:59 PM »
OK, something weird is definitely going on. 

Loading my XML on a different computer, and inputting the ODTaper2 file you supplied I get what you can see in the ODT1 screenshot file below, which looks very close or identical to the simulation diagram I get on the actual lathe computer where all of this started.

Loading the same ODTaper2 file under the standard non customized XML, (Mach3 turn) I get what appears in ODT2 screenshot.  Interesting thing is, this looks like what the lathe actually cut.  You can see how flat the angle is-it's not the 45 degrees I need.

Incidentally, what version are you running?  I'm not at the lathe so I don't know the exact version, but it's in the 2's I think.  The other test computer I'm using is running version 3.042.

Mr. Technical