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1  Made by CamBam / Members Projects / Pointlist proves useful on: December 31, 2019, 13:29:45 pm
I needed to turn this shape for a current engine build, where I had Solidworks model for the part.  Converted to DXF, adjust the outline, and created a pointlist along the curves with 50 thou spacing.  I was able to display the points and screen print them.  Then used a cutoff tool with DRO assistance.



Preliminary sanding with 80 grit got most of the steps out.

2  Support / CamBam help (General usage) / Re: Machining operation for complex part on: December 12, 2019, 12:50:34 pm
Bore first on lathe, then use hole for reference on the mill.
3  Support / CamBam help (General usage) / Re: Machining operation for complex part on: December 11, 2019, 18:40:03 pm
If the center section doesn't need to be cylindrical just make it flat sided.

Rounding afterwards can be done on a 4th axis, or manually with a rotab.  Or on a manual mill with a rod through the center to maintain a constant height above the vise.

You could do the profile cutting only half depth and reversing the part to do the same.
4  Support / CamBam help (General usage) / Re: Start Point vs Machining Origin on: December 05, 2019, 12:30:41 pm
Quote
If the starting point of the machining is not set (NAN), the starting point is always the first drawn point of the polyline.  This applies to both open and closed polylines.

Either end of a open polyline can be the start point, depending on inside/outside, climb/conventional, polyline direction.
5  FeedBack / Feature Requests / Re: Progressive Pecking on: December 05, 2019, 12:25:10 pm
G-wizard recommends 1x pecking for all holes where pecking is needed.  I've never had an issue using anything but that on deep holes.
6  Support / CamBam help (General usage) / Re: Start Point vs Machining Origin on: December 04, 2019, 12:42:00 pm
For a profile on a closed polyline the default start position is always on a point within a polyline.  Other than that I have no idea how that point is selected.  Most of the time I don't care.
7  Made by CamBam / Members Machines / Re: OT: Measuring Tools - 2 Related Topics on: November 28, 2019, 21:17:46 pm
I do remember seeing someone use a sine bar long ago, but can't remember how he did it.

One idea to speed it up is to mount a length of ground stock in a tool holder and rotate the compound so as to mate the stock against the taper mounted between centers.
8  FeedBack / Feature Requests / Re: Constant feed MOP on: November 28, 2019, 13:56:56 pm
I'm a big fan of the trocho mops.  Being able to use the side flutes is for me a major factor in tool life.  I really enjoy the pocket MOP for machining larger round holes in a single MOP vs. drill + profile mops.  I use the profile version less often, but where it really shines is removing material in aluminum where a slot is likely to result in chip welding.
9  FeedBack / Feature Requests / Re: Constant feed MOP on: November 24, 2019, 13:08:11 pm
I wonder if this would also work for thread mill code.  Normally here one calculate a linear feedrate based on desired SFM, then adjusts feedrate according to external (higher) or internal (lower) threading.
10  Made by CamBam / Members Projects / Re: Can't (yet) find the drill I need. on: November 22, 2019, 13:46:46 pm
Kvom,
Have YOU ever tried drilling a hole in the nose-end of a hardened 118-degree twist drill?  I mean, really.

I'd rather have one 'custom ground' than to try to modify a good-quality drill!

Lloyd

I intended the drilling to start from the flat  end of the drill.  But since a custom grind is so cheap that's the way to go.
11  Support / CamBam help (General usage) / Re: Start Point vs Machining Origin on: November 22, 2019, 13:44:38 pm
They are unrelated.  Machining origin allows the machine 0,0 to be different from the grid 0,0.  Start point allows specifying the approximate point for a MOP's tool to being the op.
12  Made by CamBam / Members Projects / Re: Can't (yet) find the drill I need. on: November 22, 2019, 00:30:02 am
Take stub length 1/2" drill bit.  Mount in lathe and drill 1/8" through hole using carbide drill bit.  loctite desired length of 1/8" drill bit in the tip.   Huh
13  Made by CamBam / Members Machines / Re: My personal discovery of Thread milling on: November 19, 2019, 13:14:35 pm
Welcome to the thread mill club.  For me, 99% of thread milling is external for studs.  Climb cutting is really necessary to get good threads on my mill.
14  Support / CamBam help (General usage) / Re: Distance along an arc on: November 12, 2019, 12:35:44 pm
Perimeter would work if the arc were broken at the points.  So make a copy, break it, and apply the plugin.
15  Support / CamBam help (General usage) / Re: Round hole - Plunge first - then cut sides to needed diameter? on: October 28, 2019, 12:13:52 pm
I have been using the trochoidal plugin for this since it has been available for holes larger than 2x tool diameter.  The advantage over the spiral drill MOP is that there is no concern over ramp angle when the hole is deep.
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