Author Topic: open pocket trochoidal?  (Read 717 times)

Offline turbothis

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open pocket trochoidal?
« on: March 23, 2020, 17:45:12 pm »
so far i like the cambam but are trying to see if i can use it for the reason i bought it
i have a part that i want to gut out the top .300" of
i start on the left side of this open pocket and cut to the right. outlined in red

Offline Bob La Londe

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Re: open pocket trochoidal?
« Reply #1 on: March 23, 2020, 17:48:58 pm »
Copy and paste the geometry that you have highlighted, add some extra geometry on one side, join it together, and pocket it out with an appropriate start point.
Getting started on CNC?  In or passing through my area?
If I have the time I'll be glad to show you a little in my shop. 

Some Stuff I Make with CamBam
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Offline turbothis

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Re: open pocket trochoidal?
« Reply #2 on: March 23, 2020, 17:53:29 pm »
like this but no spiral lead in

Offline turbothis

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Re: open pocket trochoidal?
« Reply #3 on: March 23, 2020, 17:54:50 pm »
my first thought was to add some length to the left and have it toolpath from out of the part. then i can just manually edit out all of the spiral.
there is no other way but this?

Offline turbothis

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Re: open pocket trochoidal?
« Reply #4 on: March 23, 2020, 17:58:34 pm »

Offline Bubba

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Re: open pocket trochoidal?
« Reply #5 on: March 23, 2020, 20:25:23 pm »
Yes that would work, but what wrong with spiral lead-in?
My 2¢

Win 10 64 bit, CB [1.0} rc 1 64 bit, Mach3, ESS, G540

Offline Bob La Londe

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Re: open pocket trochoidal?
« Reply #6 on: March 23, 2020, 20:42:07 pm »
Yes that would work, but what wrong with spiral lead-in?

if he's starting off the stock to create an opening through the edge of the workpiece then there is no need to spiral down to depth because there's no material where he's starting.
Getting started on CNC?  In or passing through my area?
If I have the time I'll be glad to show you a little in my shop. 

Some Stuff I Make with CamBam
http://www.CNCMOLDS.com

Offline turbothis

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Re: open pocket trochoidal?
« Reply #7 on: March 23, 2020, 22:40:12 pm »
correct
"open pocket"
stupid dual screen clip. lol
deleted the front open end and got a nice bit of code from it
well worth the 150. i just need to master up on it some....


« Last Edit: March 23, 2020, 22:45:19 pm by turbothis »

Offline kvom

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Re: open pocket trochoidal?
« Reply #8 on: March 24, 2020, 10:32:45 am »
Using a trochoidal profile with an appropriate cut width that clears the center would also work. 

Offline Bob La Londe

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Re: open pocket trochoidal?
« Reply #9 on: March 24, 2020, 19:07:12 pm »
You know you can just turn the spiral lead in off right? 
Getting started on CNC?  In or passing through my area?
If I have the time I'll be glad to show you a little in my shop. 

Some Stuff I Make with CamBam
http://www.CNCMOLDS.com

Offline dh42

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Re: open pocket trochoidal?
« Reply #10 on: March 24, 2020, 23:10:16 pm »
Hello

I think that only the spiral leadin of Cambam can be disabled (the purple one) as for any other mops, but the flat spiral done by the plugin can't be disabled (the yellow one)

++
David


Offline kvom

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Re: open pocket trochoidal?
« Reply #11 on: March 25, 2020, 09:32:11 am »
I wasn't aware that the MOP allowed spiral leading vs. straight plunge.   I wonder what the pros/cons of using it might be.  On my mill the straight plunge works well other than generating a wad of chips around the endmill with some materials.  A spiral is limited by whatever ramp angle the endmill can withstand and would thus be slower reaching the bottom.  But then the initial moves of the flat spiral would be less stressful.

Offline turbothis

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Re: open pocket trochoidal?
« Reply #12 on: March 25, 2020, 22:48:17 pm »
You know you can just turn the spiral lead in off right? 

how and where?

Offline Bubba

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Re: open pocket trochoidal?
« Reply #13 on: March 25, 2020, 22:57:25 pm »
Look in the MOP settings
My 2¢

Win 10 64 bit, CB [1.0} rc 1 64 bit, Mach3, ESS, G540

Offline turbothis

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Re: open pocket trochoidal?
« Reply #14 on: March 25, 2020, 23:07:21 pm »
hmmm, mine is at none ???