Re: First part!

Congrats Randy!

What's the G3 for? I saw your pix, yup, that's a heptagon. DARK
plastic. Where's the macro? In VisaVersaCAD? What did you do for tool
offset?

May the Swarf be with you!

Alan KM6VV


Randy Gordon-Gilmore wrote:

>
> Last night, I cut my first successful part on the CNC'ed Sherline mill.
> It's a 7-sided shape (heptagon) cut into the top of a block of Delrin
> (acetal plastic, but I know this piece is really Delrin brand name...)
> Nothing that will win any design prizes, but enough that I scribed the date
> into the side of the block. :-) I put a picture in the files area at
>
> http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/Randy%27s%20Sherline%20m
> ill/heptagon.jpg
>
> I wrote a macro to take a 2D toolpath (lines and arcs) drawn in VersaCAD
> (my ancient 2D program of choice) and output the G-code for the path. All
> G1, G2 and G3. Then I go in with a text editor and do the initial
> positioning, depth setting, linear speed etc.
>
> I'm using DeskNCrt to drive the Mauch 2A board. I'm being really
> conservative for now, using 10ipm for jog and G0, and cut the part at 4ipm.
> I had made an unsuccessful try on Sunday, which cut the shape OK but was
> misplaced relative to the stock because the G0 speed was too high. I've
> also played some with the acceleration, but I don't see a setting in the
> INI file that lets me set the before-ramping speed. I had to reverse the
> sense of the Y and Z axes by putting negative numbers in the INI file for
> INPUT_SCALE and OUTPUT_SCALE.
>
> A thought that just came up is, I need to check the current settings on the
> driver board. I had dropped back on them when I was testing it before the
> motors were on the mill, but I don't know whether I bumped them back up...
>
> Best regards (with a big happy grin),
>
> Randy