Chamfer'd Edges

[Randy Morton @ Clem Industrial]

Hey all,

 

I have some custom defined chamfer tool, straight from the tool catalog the information was taken in put in MCX. When I go to use any of them, they are always off the part. From the verify, it looks like they are compsated (in this case) too far to the left. So I try right side and it cuts down the mid-right of part (huge cut, very wrong!). So I turn comp off for center line cutting and it still cuts big into the part. What am I doing wrong?

 

Thanks!

[spade117]

do you have width set as low as possible?

[Guest]

I have found when using chamfer tools, that you have to do the math to get the step and depth to be correct. If you just use contour MC sees only the Diameter of the tool, you have to adjust it into position.

 

I do this with a minus stock amount in the XY stock left box.

 

If you're doing 45° chamfer try using contour and set it to chamfer, it handles the calculations for you them

[within a thou]

Get a disk grinder save yourself the headaches

[brilu397]

I create a seperate tool in mastercam and lie to it about the outer diameter. ex: if I have a 60 deg. chamfer with an OD of 32.mm and an ID of 22.mm, I define my tool as having an OD of 22.mm. It's basically the same as what jmparis is doing only saves me from typing in the offset everytime. If your using the same tool to do both top and bottom chamfers you'll have to define the tool to spec and do the math for the chamfer on top.

[Randy Morton @ Clem Industrial]

Disk grinder in hand and ready to go...now what?

 

I got it to work trying a with the negative offset on XY stock to leave and the chamfer mode. Works good.

[JG]

MillingMan,

when you do the contour do you set the type to chamfer and set the values? (left side of the page) this has worked very nice for me.

 

thanks,

 

Jg

[3rdstring]

quote:

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If you're doing 45° chamfer try using contour and set it to chamfer, it handles the calculations for you them

---

I use that for most chamfers regardless of angle, you just have to know the width of the chamfer & set up a chamfer tool with the right tip dia & angle

[?Mark]

Randy,

Not sure why you having problems with it.

It's a pretty straight forward with chamfer tool.

I use them all the time (hate teh files... )

and backplot/verify always looks good

[Randy Morton @ Clem Industrial]

Actually it turns out, upon closer inspection of the verified part, that one of tools is tacking out material where it's not suppose to be, and such likely why I have to screw with the 45 tool.

 

I am going to post the part on the ftp in the MCX folder and call it MM Plate.MCX. What I am looking at with the error is when it uses the 4" face mill, on either side of the key, it cuts to close to center and when the 2" face mill finishes, from the right side view, there is an obvious step.

 

Any help would be awesome!

[within a thou]

Randy another option is to set the tool up on a shadow graph find a safe minor od of the tool and the distance from the bottom of the tool to where the 45 on that OD will touch plug that diameter into mastrcam touch the tool off then compensate for the distance from the bottom of the tool to where your safe minor OD will break the edge on the part then progam it as a countour using the size of your chamfer for your Z depth

[spade117]

Randy, I took a look at your file and I noticed that for stock to leave with the 4" face mill you have -.01 and for the 2" cutter you have .01, this will cause the step that you are getting. Taht might help with the chamfering problem as well.

[Randy Morton @ Clem Industrial]

Nope, that didn't do it. I tried that, actually before I got your reply, Spade, to no avail. Something is still wrong...

 

I am getting close to repathing the whole thing...

 

[spade117]

what size chamfer are you trying to achieve along the rib in the middle of part?

[Randy Morton @ Clem Industrial]

Nope, that didn't do it. I tried that, actually before I got your reply, Spade, to no avail. Something is still wrong...

 

I am getting close to repathing the whole thing...

 

[spade117]

that is the same post. you didn't answer the question.

[Randy Morton @ Clem Industrial]

The chamfer is irrelevant. I just want to break the corner. But that little understep along the key that the 4" cutter makes is not right. I did try re pathing it, and it came out the same.... I don't know what it's doing....

[spade117]

I see what you are saying now. I don't know why it's doing that. are the #'s ok when you post them? It could be a quick manual change. Sorry I couldn't help you anymore than that.

[Randy Morton @ Clem Industrial]

It's a bloody shame I don't solids here. Oh well, in a few days I will, at the new shop! yeah me!