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Cut Gears alteration
« on: August 14, 2006, 01:50:20 PM »
I tried using the cut gear wizard and found that the program is set to cut the entire depth first and then rotate the table. This works fine for using involute cutters whereas the cutter cuts the entire gear tooth profile.

I use a hob to cut gears and therefore need the cutter to cut to a certain depth that I determine, then rotate the table and repeat until the entire circumference is cut to that depth and then to start over and cut to an additional depth and go completely around again and repeat this process untill the entire gear is cut to its final depth. This method is required because the Hob modifies the tooth profile of the 2 adjacent gear teeth which thereby creates the involute portion of those teeth.

I hope I explained it properly and not just confused the question.

Is there already the ability to do this with the present wizard? If not, can it be modified to achieve this?

Larry Miranda
Re: Cut Gears alteration
« Reply #1 on: August 15, 2006, 05:50:38 AM »
Could you please give me an example of the Gcode that you would use to do that?
Fixing problems one post at a time ;)

www.newfangledsolutions.com
www.machsupport.com
Re: Cut Gears alteration
« Reply #2 on: August 15, 2006, 09:46:11 AM »
Hi Brian

Thanks for taking an interest in my question. Here is my example of G-code and some explanations.

=============================================================

Cutter located in the front and to the left of the blank that will be cut into a gear.
The finished gear will be 12 teeth and the total depth of cut will be 0.090 deep.
The width of the gear will be 0.300

The above criteria has been chosen for this example and does not reflect real world
data for an actual functional gear.

The z-axis will not move during the cutting and is positioned in the center of the blank.

The X-axis is used to cut the width of the gear.
The Y-axis is used to cut the depth of the tooth (the valley between 2 teeth).
The A-axis is used to rotate the blank (in this example 30 degrees between teeth)

GO1 Y0.0450 F2.0
G01 X0.6000 F5.0
G00 X0.0000
G00 A30.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A60.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A90.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A120.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A150.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A180.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A210.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A240.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A270.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A300.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A330.00
G01 X0.6000 F5.0
G00 X0.0000

(RETURN TO 0 DEGREES AND INCREASE DEPTH OF CUT)

G00 A0.00
GO1 Y0.0900 F2.0
G01 X0.6000 F5.0
G00 X0.0000
G00 A30.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A60.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A90.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A120.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A150.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A180.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A210.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A240.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A270.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A300.00
G01 X0.6000 F5.0
G00 X0.0000
G00 A330.00
G01 X0.6000 F5.0
G00 X0.0000
G00 Y0.00 A0.00

M30


In this example I used 2 passes to cut the entire depth of the valley
between the gear teeth. In the real world many more passes would be required
as my Taig would not be able to cut 0.045 each pass and the quality of the cut
and the shape of the teeth would be greatly improved with smaller depths per pass.
 
===================================================

Thanks
Larry

Re: Cut Gears alteration
« Reply #3 on: August 15, 2006, 03:02:59 PM »
Thank you, I will look into it :)
Fixing problems one post at a time ;)

www.newfangledsolutions.com
www.machsupport.com
Re: Cut Gears alteration
« Reply #4 on: August 22, 2006, 10:41:36 AM »
It is been a week with no feedback. I have a project I would like to get to using the wizzard.

Are we looking at days, weeks, months, maybe never? Please advise....

Larry
Re: Cut Gears alteration
« Reply #5 on: August 23, 2006, 05:58:44 AM »
Sorry I think I lost the list that I had this on.. It is back on the list and will get fixed! If you everneed something and I have not done it please feel free to ask me a few times. I work on so many things that some times the little ones get lost :(

Thank you
Fixing problems one post at a time ;)

www.newfangledsolutions.com
www.machsupport.com

Offline John S

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Re: Cut Gears alteration
« Reply #6 on: August 23, 2006, 03:54:29 PM »
Which cut gear wizard?
The one with mach3 or the one in the Newfangled suite ?

The one in the Newfangled suite is crap.
The cutter diameter is missing and so it can't post code.

Did I mention it was crap ?
:D

John S.
Re: Cut Gears alteration
« Reply #7 on: August 23, 2006, 05:38:17 PM »
John I will look into this asap :) I will have the code open to see if it is posable to add the gear hob stuff...
Fixing problems one post at a time ;)

www.newfangledsolutions.com
www.machsupport.com
Re: Cut Gears alteration
« Reply #8 on: August 23, 2006, 05:42:41 PM »
John you need to set the tool Dia in the Tool set up screen :)

if you do that I think you will be all set ...
Fixing problems one post at a time ;)

www.newfangledsolutions.com
www.machsupport.com
Re: Cut Gears alteration
« Reply #9 on: August 23, 2006, 05:57:38 PM »
After I looked into the the code... I can tell you that it will take a rewrite of the wizard :( I can't take the time at this point in time...
Fixing problems one post at a time ;)

www.newfangledsolutions.com
www.machsupport.com