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1  Support / Problem dxf files etc... / Re: Problem file tool path doesn't follow polyline? on: March 25, 2013, 23:34:28 pm
Almost there... Engrave does follow the line, but without tool offset to allow for a side cutting double angle cutter.

Tried doing line offset in CamBam, but offset line is XY plane only. Tried same in TurboCAD Pro, and says original line is not valid for operation.

Source line is from another developer in another State, using different software, dialect, and on a different contract from a common client.

I'll request another file with estimated tool offset. Since try-fit by lens maker is required for final tool offset, it may take a few file exchanges.

Oh. the joys of Hi Tech!  Grin
2  Support / Problem dxf files etc... / Re: Problem file tool path doesn't follow polyline? on: March 25, 2013, 19:23:12 pm
Thanks. Will give it a try.

Paul
3  Support / Problem dxf files etc... / Re: Problem file tool path doesn't follow polyline? on: March 25, 2013, 06:34:59 am
Rather than start a new thread, I'm posting here because I think my issue is similar enough.

I need to cut a lens groove inside the aperture of custom wrap around glasses. I've tried my various CAM packages, and can't get any of them to follow the XY outline along a Z-axis curve. The cutter would be a 1/4" side cutting double angle.

I've been away from here for a few years, so haven't kept up with new developments.

Attached is a rudimentary start .cb file showing the toolpath is only generating on the XY plane, with no Z-axis variation.

Here's the tool type:
http://www.internaltool.com/products/product_detail.php?series=92

Paul, Central OR
4  FeedBack / Bug Reports / Angry Aphid CutViewer Output G-code on: June 15, 2008, 04:54:01 am
Hi Andy,

Finally got a chance to try-out the latest release. Always a joy to see a new release... even with intimidating names like "Angry Aphid"!  Grin

Now for some observations...

1) When "Tools/Simulate with CutViewer" is selected, I get an error dialog saying "C:/Documents file not found". Apparently not picking up the default G-code save location?

2) After opening the G-code file in CutViewer, my sample asks for definition of the first three tools (not inserted by CamBam), then errors out with a "not floating point value" on the inserted value for the fourth tool. The culprit was an inserted tool definition with a $t variable rather than the actual floating point value. CutViewer goes into "Not Responding" mode, and has to be killed.

Attached are my .cb file, and two G-code files... raw output from CamBam, and my edited version that CutViewer runs on.

Thanks again for the continuing work, and extra thanks to your family for sharing you with us.  Wink

Paul, Central OR
5  Support / CamBam help (General usage) / Re: Best way for a shinny surface ?? on: May 03, 2008, 10:05:42 am
Don't know where you're located, but in the US there's a spray on product to protect bare metal:

http://www.eastwoodco.com/jump.jsp?itemID=415&itemType=PRODUCT

Paul, Central OR
MiniMechanicals.com
6  Support / CamBam help (General usage) / Re: Best way for a shinny surface ?? on: May 02, 2008, 00:16:56 am
I use a peice of safety-plate glass (laminated like winshield glass) with sheets of silicon carbide sandpaper wetted with lamp oil. My local Ace Hardware has grits up to 1500 in the painting supplies section. I work with 240, 320, 400, 600, 1200 and 1500... starting with the finest that will remove the swirls.

I had a local glass shop cut a piece of safety-plate 12"x12", with sanded edges... at a cost of $18 US.

After I get the finish as smooth as the 1200 to 1500 grits will go, I use a piece of new denim (still has the sizing in it to help hold it flat) with Tripoli rubbed on the surface. This gives me a near chrome look finish. Tripoli is available in sticks from all buffing supply outfits.

The aluminum frame on this little engine was finished as above:

http://www.mechanicalphilosopher.com/pcham31.jpg

Best of luck...

Paul, Central OR
MiniMechanicals.com
7  Support / Related Softwares / Re: Cutviewer link on: April 10, 2008, 19:13:53 pm

I have cutviewer installed, but i cannot find the g-code post file to change the file header


Hi Paul,

Select the "Machining" folder in the MOP tree. Down in the Properties, there is a category "Misc" and a field named "CustomFileHeader". The field entry has elipses (...), which when clicked brings up an "Edit Text" window. Enter your CutViewer specific comments there.

Similar for each MOP... In the properties for each MOP is a "Misc/CustomMOPHeader" field where you can enter the Cutviewer specific comment.

Hope this helps...

Paul, Central OR
MiniMechanicals.com
8  Support / CamBam help (General usage) / Re: problem with cutting direction on: April 02, 2008, 14:20:06 pm
Hi Nico,

The holding tabs in other discussions are generated within CamBam for thin "sprues" at the bottom of the cuts... holding the part in place so it doesn't interfere with the cutter as it might if it were free to move around. Referred to as "Bridges" in USBCNC V3.

It sounds like you are trying to define hold down tabs (clamps), which is not yet implemented in CamBam (on my wish list... clamp avoidance).

Your eight polyline segments are two dimensional... without logical inside or outside surfaces. So I'm guessing CamBam is "flipping a coin" to determine which side the cutter will travel.

Until Andy adds clamp avoidance, I would suggest:

Draw your enclosed profile.

Overlay your tabs so they extend into the profile for the distance you want for Z retract.

Do 2D Boolean Subtracts leaving "notches" in your profile where the tabs were.

Create MOP's and generate G-code.

Edit G-code to change X-Y moves at the tab boundaries to Z moves (value will be in the X-Y move along the side of the tab notch), and remove any extraneous moves between tab boundaries.

Also... you should see a carat symbol (^) at the start point of the toolpath in the CamBam display, indicating the toolpath direction. If not, it is set under Machining (MOP tree), Properties/Toolpath Visibility/ShowDirectionVector.

Paul, Central OR
MiniMechanicals.com
9  Support / CamBam help (General usage) / Re: problem with cutting direction on: April 02, 2008, 08:13:21 am
Hi Nico,

I use TurboCAD Deluxe 14, so hope I can help...

The binary math used by computers cannot come up with "exact" values for other than whole numbers, such as fractions and decimals. So a "fudge factor"... tolerance is needed.

Under the menu item "Tools/Options", try varying the "Options/GeneralTolerance" between 0.001 to 0.00001 (mine is currently set at 1E-6).

In TurboCAD, you can zoom in to see if you have any obvious misalignment of polyline ends at transition points between segments. Correct as needed.

I use "Join Polyline/Finish Join Polyline" in TurboCAD to build profiles. A quick mouse drag-away of the joined polyline profile will show any disconnected segments, then "Undo" to return the profile to position. Correct misalignments if needed, and "Join" again.

In CamBam, you can view MOP toolpaths individually to better see what is happening at each segment, before generating G-code. In the MOP tree, select the "Machining" folder. Down in the properties, at "Toolpath Visibility/ToolpathVisibility" drop down menu, choose "SelectedOnly". Then step through your MOP's and verify they are behaving as anticipated. Use Alt-Left mouse button to rotate the view to see from all sides... Alt-Left mouse button double click to return to top view.

Paul, Central OR
MiniMechanicals.com
10  FeedBack / Feature Requests / Header Tool Definitions for CutviewerMill on: March 25, 2008, 11:26:15 am
Hi Andy,

Attached is a sample of how tool definitions can be included in the header that works for me in CutViewerMill.

Thanks, Paul
11  FeedBack / Feature Requests / Direction arrows on: March 15, 2008, 00:47:01 am
Hi Andy,

Might I suggest using a random seed for placing the direction arrow some distance out from the starting point.

I typically generate separate toolpaths for roughing (conventional) and finish (climb) passes, with 0.005"~0.010" separation. In the display, the arrows are virtually superimposed.

I just tried moving the starting point... it is not a problem if I move the starting point to an outside corner. The arrows are placed at opposite ends of the toolpath corner arc.

Paul, Central OR
12  Support / CamBam help (General usage) / Re: copying mops on: March 15, 2008, 00:37:03 am
Hi Andy,

I did miss that one... I guess I had blinders on, working with individual MOP's. That is usable..

I'm accustomed to the Desktop Publishing apps, where hiding layers is common... prime example is PhotoShop. They typically have an eyeball icon (all seeing eye?) next to the layer name to click for visibility.

I do think it would be handy to be able to turn off toolpaths by MOP or MOP layer... maybe an on/off toggle in the context menu? That would be quicker than scrolling in the properties matrix. The properties matrix could still hold the settings preference for how the toggle behaves.

Paul, Central OR

Quote
I am not sure if you are aware of this one, but under Machining properties, there is a ToolpathVisibility option which can be All or SelectedOnly.  SelectedOnly is useful when you have toolpaths mixed up with other toolpaths as you mentioned and will just display toolpaths for machine operations selected in the drawing tree.
13  Support / CamBam help (General usage) / Re: copying mops on: March 14, 2008, 22:05:10 pm
Hi Andy,

Will that include the ability to add sub-folders, similar to the "New Layer" for the Layers folder? Maybe "New Machining" with editable name?

That would help the clutter issue... as an example all MOP's for each tool change in their own collapsable folder.

Additionally, "Apply Template to MOP" for the sub-folder could save mouse clicks.

Another nice feature would be the ability to "hide" the toolpath display for any MOP subfolder... or individual MOP for that matter. That would help when working on other individual MOP's that might get obscurred in a complex project.

Paul, Central OR

Hello Dave,

The intention is to have copying and pasting within the drawing tree, as well as dragging and dropping and ideally multiple selections.  The tree code is due a big rewrite soon to help make this happen and fix a number of issues.
14  Support / CamBam help (General usage) / Re: copying mops on: March 11, 2008, 06:15:24 am
Well, I meant the same exact MOP, applied to the same geometry, etc..

Same thing... for me.

I just select the geometry again, create the appropriate MOP, and "Apply Template to MOP".

For slotting with even number flute endmills, I cut to and fro with 0.005"~0.010" tool offsets each pass, so the cutting edge is cutting conventional... leaving 0.005"~0.010" material for a finish climb pass. This reduces the recutting of chips, and reduces harmonic chatter.

After auto code creation, I copy/paste lines of code so the cutter goes back and forth down the slot path, reducing cycle time over moving back to the starting point to start the next pass. Example code attached.

Otherwise, I use 3 flute endmills when slotting.

Paul, Central OR
15  Support / CamBam help (General usage) / Re: copying mops on: March 09, 2008, 21:02:49 pm
I think I know this one...

On the upper toolbar is the title "Template". In the drop down text box to the right, type in a name to describe the MOP you want to save, and press Enter. You will get a dialog window asking if you want "Create new template 'your description'?". Click button "Yes", and the template name is added to the drop down menu.

Make sure your new template name is displayed in the toolbar...

Go to the MOP you want to save, and right click for pop-up menu. Select "Copy MOP to Template".

Create a new MOP. Right click on the new MOP for pop-up menu and select "Apply Template to MOP".

Your new MOP will have the parameters of the previous MOP, as saved in the template.

You can now modify parameters as needed to customize the new MOP.

Hope this helps...

Paul, Central OR
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