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February 19, 2020, 14:42:07 pm


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Author Topic: [V1 -51 ] Profil-MOP 0.98 and 1.0  (Read 286 times)
pixelmaker
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« on: February 12, 2020, 22:18:53 pm »

I have found an bug that occurs when I want to mill small circles with an end mill.
A hole with a diameter of 4.05mm I cannot mill out with a 4mm cutter.
With a pocket mop it works. I can mill a hole of 4.05mm with a 4mm cutter.

Since pocket and profile MOP should create the same tool paths in this case, this is a bug for me. The bug is present in 0.9.8P and V1.0 rc3

The needed difference between tool and circle becomes larger with larger diameters and is not static.
For a 9mm hole, the cutter may only be max. 7.36mm thick

ralf
« Last Edit: February 14, 2020, 12:17:34 pm by dh42 » Logged
EddyCurrent
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« Reply #1 on: February 12, 2020, 22:25:11 pm »

I think "max crossover distance" is connected to it.
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pixelmaker
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« Reply #2 on: February 12, 2020, 22:41:42 pm »

I went through everything, set it to zero and played with all the values. Without success.
If the same values work in the Pocket MOP it should work in the Profile MOP too.

* kreis test.cb (6.1 KB - downloaded 5 times.)
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Garyhlucas
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« Reply #3 on: February 12, 2020, 23:26:21 pm »

Use a drill MOP with spiral milling.
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pixelmaker
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« Reply #4 on: February 13, 2020, 10:47:19 am »

I know all the workarounds. I can alternatively spiral drill or use a pocket.
But you have to do it with the profile MOP.
Bugs have to be reported, then they are fixed.
And we have to give Andy reasons to keep him working on CamBam. ;-)

ralf
« Last Edit: February 13, 2020, 21:29:14 pm by pixelmaker » Logged
gmoo
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« Reply #5 on: February 13, 2020, 11:28:00 am »

I also have seen this.

In addition there is the same problem using drill mop spiral drill.
But I actually do not have explicite values to raise the problem.

Drilling a hole using spiral drilling is not working if reqired drill diameter is close, but still
greater the the physical diameter, approx. 0.2mm or so.

Using a pocket instead works.

I´ll report if I have values causing the problem.


Solved for me by setting the Max. crossover distance to 0 by default.

« Last Edit: February 13, 2020, 13:10:57 pm by gmoo » Logged

best regards

Bernhard
dh42
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« Reply #6 on: February 13, 2020, 13:03:13 pm »

I went through everything, set it to zero and played with all the values. Without success.
If the same values work in the Pocket MOP it should work in the Profile MOP too.


Hello Ralf

On the V1.0 (RC3) I tested with a profile mop on a circle Ø4.05 mm and a tool Ø 4.0 and I get toolpath from 0 to 0.039 for Max Crossover Distance, the TP disappears for MCD = 0.04

with a hole = 9mm and a tool = 8.9mm, I get toolpath up to 0.035 for MCD.

++
David


* Sans titre-1.jpg (87.96 KB, 1024x1522 - viewed 7 times.)
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dh42
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« Reply #7 on: February 13, 2020, 13:10:55 pm »

Quote
Drilling a hole using spiral drilling is not working if reqired drill diameter is close, but still
greater the the physical diameter, approx. 0.2mm or so.

tried Drill mop (spiral mill) with Tool Diam = 8.98, hole diam 9 mm and Max cross distance = 0.7 and .... no problem  Huh (V1.0)

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David


* Sans titre-2.jpg (94.23 KB, 1007x752 - viewed 6 times.)
« Last Edit: February 13, 2020, 13:47:43 pm by dh42 » Logged
gmoo
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« Reply #8 on: February 13, 2020, 13:12:01 pm »

Tried it, too,

and solved for me by setting the Max. crossover distance to 0 by default.

Thanks anyway !
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Bernhard
pixelmaker
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« Reply #9 on: February 13, 2020, 21:40:20 pm »

hello David

I have written that spiral drilling and pocket mop work. The pocket mop also works with a max crossover distance of 0.7 (default).
The error occurs only with the profile mop. 
The problem occurred for a german user. I have already told him the alternatives.
I am of the opinion that there is an bug in the profile mop and have therefore written it here.
There is no logical reason why I should set max crossover to 0 if there is no matter for this. With tight engravings I can argue logically that it is necessary. Since this is an obvious bug you should add it to the bug list. 

ralf
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gmoo
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« Reply #10 on: February 14, 2020, 07:54:03 am »

I totally agree to Ralf, This is a bug, not a feature !

Circle diameter 2.0mm, tool dia 1.95mm. max crossover 0.7 => data not generated.
A year ago or so I was very angry about that, cause holes were missing.

So I use pockets or drills instead of, but there is no logical reason to do this.
Setting the max. crossover to zero is a workaround only.

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Bernhard
pixelmaker
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« Reply #11 on: February 14, 2020, 09:52:58 am »

The user has written me that his controller "editasc" does not execute the spiral drilling.
That was the reason to get it done with a different operation. Sometimes the simplest solutions simply fail.

ralf
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dh42
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« Reply #12 on: February 14, 2020, 12:24:50 pm »

Added to bug list.  Wink

I thought it was already in the bug list, but it was not.

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David
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