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July 23, 2019, 13:05:38 pm

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1  Made by CamBam / Members Projects / Re: 9 cylinder radial parts on: Yesterday at 08:46:42
Hi Steve, may I ask you what rotary axis are you using?
Nice jobs!
2  FeedBack / Bug Reports / Re: [V1 - 30] "Cancel" does not work as expected on: July 18, 2019, 22:12:41 pm
Thanks for the explanation.
I think the abort command should just... abort! Then, if I want to revert back the partial changes I can use the undo function. Of course it's ok if it takes some time now, to complete the undo.
3  Support / CamBam help (General usage) / Pan while drawing on: July 18, 2019, 14:33:36 pm
I would write this post in the bug section, but I'm sure someone will say it's a feature and there's no need to change it Grin so I write here Cheesy

We know we can move around the CamBam space (pan) using the wheel button.
If you are drawing something, and you want to pan the sheet, you can't - at least I cannot.
Steps to reproduce:

1. select a drawing tool (i.e. Polyline)
2. click on the desired starting point
3. press and hold the wheel button to pan the view: it has the same effect of pressing esc

When this would be useful? When you have to precisely align both ends of a Polyline (or center and tangent point of a circle, etc...) and you need to zoom in both areas.

Workaround: you can replace panning with zoom/un-zoom operations. It's not the same thing, but it might allow you to find the right spots.
4  FeedBack / Bug Reports / [V1 - 30] "Cancel" does not work as expected on: July 18, 2019, 14:25:52 pm
I ran a "break on intersection" operation on a huge file. After some time I decided to abort the current job and I pressed the Cancel button. In the log window the message "Abort current operation" appeared but the task continued. I pressed again the button, nothing happened. After several minutes, I had to kill the CamBam process because I had no other way to break what it was doing.

I would expect that when you request to "abort" a long operation, it would take only a while to do so.
5  Resources / Scripts and Plugins / Re: First attempt to do 4 axis toolpaths from a 3D model on: July 08, 2019, 09:15:55 am
Are you using the 4GB patch to be able to use 4GB of RAM instead 2 ?

Yes, I am.
6  FeedBack / CamBam Shop Feedback / Re: Printing CB images clearly for documentation on: July 07, 2019, 15:44:36 pm
It seems a little - um - 'abrupt' to just step in and take over another thread about a completely different subject.

Sorry, I removed the messages.
7  Resources / Scripts and Plugins / Re: First attempt to do 4 axis toolpaths from a 3D model on: July 07, 2019, 14:49:17 pm
After about 4 hours of unrolling, CamBam crashed. Now I've started again the job. I hope it will run fine, otherwise what could I send you to help to understand what happens? Aside of the cb file of course (~100 MB).
8  Support / CamBam help (General usage) / Re: Geometry to toolpaths on: July 07, 2019, 07:30:51 am
I want that cambam sets the ball nose endmill tool number for this v-engrave mop, but it is not possible.

I'm not sure to understand. You can choose the tool number in the "Tool" section of the property window. How does CamBam prevent you from selecting the tool number you createt to "mimic" the V-engrave bit?

So how can I convert polyline geometry (or any other geometry) directly to toolpath?

The engrave MOP will follow your polylines, even if they are not lying on the XY plane.
9  Support / CamBam help (General usage) / Re: Best approach to rough wood sticks on: July 06, 2019, 06:32:14 am
Hi Lloyd, I'm not sure what you're actually suggesting. I set up a lot of MOPs with different tool numbers so after each passage the M6 Tx instruction will stop the machine and I can see if I need to go 1 mm deeper or stop the facing job. This is because I cannot know in advance the final diameter of the rod as said in the first post.
10  Support / CamBam help (General usage) / Re: Best approach to rough wood sticks on: July 05, 2019, 18:29:59 pm
Attached the cb file to facing a rod from 40 mm to 20 mm.
11  Support / CamBam help (General usage) / Re: Best approach to rough wood sticks on: July 05, 2019, 18:16:54 pm
Very interesting, I didn't know this usage of "cut width"!
12  Support / CamBam help (General usage) / Best approach to rough wood sticks on: July 04, 2019, 15:35:41 pm
Hi, I have a lot of hazel sticks I want to machine with the rotary axis. Of course I need to remove their roughness first. Using a manual lathe I would begin to remove material layer by layer until I get a clean surface everywhere.

It's quite hard to calculate the final diameter - it depends on a lot of things like how you hold the stick in the chuck, the shape of the stick, etc...

So I'm going to make a MOP to remove, say, 1 mm from a given diameter. I would run this job and then reduce 1 mm further, and then again and again until I'm satisfied.

The straight way is:
1. draw a rod of the final estimated diameter
2. Unroll 3D the surface
3. make a 3D roughing MOP setting as stock surface the maximum diameter of the stick (including any bending)
4. set target depth = stock surface - 1
5. run the job
6. change the target depth -= 1
7. repeat from point 5 as needed

The problem here is the Z zero to be set at rotation axis that prevent to change the machine settings only.
I wondering if there's a simpler way to do this. Example, instead of create the actual shape:
1. draw a single line and create an engraving MOP with target depth = -1 and stock surface = 0
2. Huh (see below)
3. run the job setting the Z zero to the maximum diameter
4. lower the Z zero of 1 mm and run point 3 again as needed

What I'm not sure how to do in CamBam is creating the code for the A axis. I mean, I'm able to do this with a 3D surface (with pp) but not for a single line... And I'm not sure if it would work, because the diameter of each pass will reduce.

Another way is create a "universal" job:

1. same as the first option but prepare several MOPs already configured to run at different layers
2. set a different tool number for each one, so the machine will stop after each one giving you the way to decide whether go ahead or end the job...

Any other idea?

13  Resources / Scripts and Plugins / Re: First attempt to do 4 axis toolpaths from a 3D model on: July 01, 2019, 20:03:37 pm
If possible I think a progress bar and/or an estimated remaining time would be very useful. It's running since 4 hours (only one core, sadly) and I don't know when it will finish!
14  Support / CamBam help (General usage) / Re: Help with rotary axis on: July 01, 2019, 16:46:52 pm
1) I left the default value: 0.7. Because I set a step over of 0.1 it should not "retract, rapid and plunge to the next position".

2) Sorry, I don't understand: the roughing clearance is the amount of the stock left by the roughing MOP from the surface of the last pass, not from Z = 0. Anyway, I think I understand what happened. Because I didn't placed the "rods" at the ends of the object, the first and last toolpath didn't take in account the actual depth (because it would require more space). So for those toolpaths the roughing clearance was not honored.

4) I don't agree: the depth increment sets the depth of each pass. When it reaches a segment of the surface already above the current depth plane it should skip it in G0 (but we know CamBam does not). What surprise me is when all the following toolpaths would be below the actual surface it makes no sense to follow the surface without cutting anything. The job is already finished! Even if you set a deeper target. It never will reach it.
15  Support / CamBam help (General usage) / Re: Help with rotary axis on: July 01, 2019, 14:58:12 pm
Ok, now it begin to works Grin
There are still few things I don't understand. They might be my fault as well.

1. even if I set the milling direction to "mixed" the finishing MOP (perhaps even the roughing one, but I should run it again to be sure) cuts a toolpath in one direction, then raises the tool, goes back and run another toolpath. I was expecting the cut continuously, without go back to the initial point. This would save at least 40% of the time.

2. I set the roughing clearance to 1. The documentation doesn't say it explicitly but I guess this is expressed in units, i.e. 1 mm. When the finishing pass began, it plunged into the left material at least of 2 mm. It was hard to measure, but it was for sure more than 1 mm. Is there any other parameter that would lead to this?

3. the boundary margin has to be set to -R. Good, but how to allow some margin along the rotary axis? If the piece should be cut at both ends (like the wand in this example) would be very useful to allow some clearance of a given radius on both ends. Is already there a parameter to achieve this? The only "hard way" I can think is to hack the original STL file to add two cylinders.

4. during the roughing MOP I stopped the job at 80%, because it went back and forth without milling anything anymore. I'm aware the 3D MOP doesn't allow G0 on segments already machined, but I was expecting at least it ends when all the material was cut.

5. I noticed that the feed-rate was often reduced during cutting, I bet because the Z acceleration/feed-rate wasn't enough to maintain the cut feed-rate. This could be a problem because leaving the same rpm may burn the tool. Is there a way to calculate the minimum acc/feed-rate for Z axis needed to maintain the gived X/Y/A feed-rate?
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