@enl_public wrote:
I am having an issue I haven't seen before.
The key issue is locating holes for dowel pins to align a microscope stage. The spacing is specified as 70.000mm+/-0.050mm (3.00mm pins). This should be reasonable for the Nomad, though at the limit. With taper-lead dowel pins, it is likely to be good enough, as, over 70mm, the position should be within 0.029mm using the 0.005"/ft spec from the spec sheet.
Well, I have blown a day (5:30AM til now, 5PM) trying to figure out why the stage replacement won't fit. The dowel pins won't even start. Re-ran the job with only the locating holes. No fit. Maybe the bore operation was the problem, so I removed it and drilled at 1.5 mm and finished to size by hand using 3.0mm drill on the drill press. No go. Finally I got smart.
Drilled the pilot holes at 0.8mm, fit snug gauge pins, and actually measured. Center to center is 69.71mm. This is equivalent to 0.050"/ft (0.29mm/70mm--> 0.00414mm/mm, or inch/inch... 0.00414*12-->0.0497inch/ft). This is consistent whether the positioning is done as a pure X axis move or a pure Y axis move.
Is this due to the Gcode being generated in mm? I can't imagine why it would be, but.... Is there another issue?
Gcode generated using Inventor with HSM, redid the model with Fusion, checked the Gcode and the moves are correct. It is included below (with most of the Z moves for peck drilling removed) The machine is a Nomad Pro (feb2016, Ser no 127) using Carbide motion as the sender. I did not change the tool spec when I changed drills. Main reason I changed drills was because I needed a size for which I have matching gauge pins.
% (1001) (alignment holes for nikon scope) (T2 D=1.5 CR=0 TAPER=90deg - ZMIN=-5 - drill) G90 G17 G21 G28 G91 Z0 G90 (Drill1) M9 T2 M6 S10000 M3 G54 M9 G0 X15 Y3 Z15 Z5 Z2 G1 Z-0.2 F30 G0 Z-0.1 (REPETATIVE PECK Z OPERATIONS REMOVED) G1 Z-5 F30 G0 Z5 X85 Z2 G1 Z-0.2 F30 G0 Z-0.1 G1 Z-0.4 F30 (REPETATIVE Z PECKS REMOVED) G0 Z-4.5 G1 Z-4.8 F30 G0 Z5 Z-2.8 G1 Z-5 F30 G0 Z5 Z15 M9 G28 G91 Z0 G28 X0 Y0 M30 %
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