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tjd10684
03-18-2011, 02:44 PM
I just bought a Micro 100 single point thread mill (http://www.micro100.com/downloads/micro_100_catalog.pdf part# tm-375) i am having trouble figuring out how to program the correct path and setup for the tool. what i want to do is make a thread with a 5/8" i.d. 32 tpi .25" deep. so what im doing is putting any dimensions i can from the pdf but when it comes to t i just put in 1/32" to "trick" the program into just using one thread. but when i preview the path it looks wrong. i would expect the cutter to make 8 revolutions around the hole. but it looks like it goes around like 2.5 times. im not sure why this happening. if anybody else uses a single point thread mill would you please share your settings with me or if you can walk me through setting up my own that would be great to.

M250cnc
03-18-2011, 03:04 PM
How are you doing the programming ?

Phil

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tjd10684
03-18-2011, 03:14 PM
I am using the 2.5 axis threading button on inside of rhinocam. i select a circle for the region and tell it that i want the major dia to be .625

Kiwi
03-19-2011, 06:55 AM
Can you write your code by hand.
This is what I would use with a Fagor controller.

G00 X0 Y0 Z0.5
G00 X0 Y0 Z-0.25
G01 X0.125
G03 X0.125 Y0 I-0.125 J0 Z0.0313 K0.0313

tjd10684
03-22-2011, 08:16 AM
Can you write your code by hand.
This is what I would use with a Fagor controller.

G00 X0 Y0 Z0.5
G00 X0 Y0 Z-0.25
G01 X0.125
G03 X0.125 Y0 I-0.125 J0 Z0.0313 K0.0313

thats helpfull but i was hoping that i could get the program to do it for me. its kinda the principle at this point ya know.

vhendrix
03-28-2011, 11:53 AM
Melin makes a free program to write the code. I was researching thread mills when I found your post.

The app is here..

Thread Mill Programming Assistance (http://www.endmill.com/pages/tm_request.html)

Sorry... I see you said single point.. It doesnt have any in the program.

RDesign
05-18-2011, 01:10 PM
Rhino just uses the OD you have in the tool setup and the settings you use in the Threadmilling window to generate the toolpath. All the thread pitch and info in your tool library is for your own documentation as far as I can tell. In the threadmilling window you can select internal, right hand, major diameter (.656" approx if I read your post right), thread length.. I always set this to a number that is a multiple of the pitch.. if you want 4 turns of 32tpi thread the thread length is .125" and the number of leads is 4. Number of leads is a little misleading, I wish it said number of turns. Start angle is used if you want the threads clocked is some different rotation, cut direction climb typically and then you can use the stepover control if you have a coarse thread that requires it. There is an entry/exit tab that will let you control how you enter and leave the hole. Keep in mind, climb milling an ID hole will start at the bottom and end at the top, just FYI.

You can use threadmilling with a regular endmill selected, this can be usefull to create a helical ramp entry into a pocket.