Engraving a cylinder with graduations to be used as machine tool / lathe dial.

Using gcmc to generate the gcode, this becomes a trivial exercise in more modern programming techniques.

feedrate(400.0mm);

sf = 10.0mm;    /* Scaling factor */
diameter = 80.0mm;      /* Scaling factor */

n = 0;

for (c=0deg; c<360deg ; c=c+3.6deg ) {
// message(">>>> ", c, " ",c%36);

 if ( ( c % 36 ) == 0deg || ( c % 36 ) == 36deg) {
 message("--- ", n);
 vl  = typeset(to_string(n), FONT_HSANS_1);
 vl = scale(vl, [sf / (2.0*pi()), sf]);
 n = n + 10;
 goto([diameter/2,-,0.0mm,-,-,c]);
 move([-,-,14.0mm,-,-,-]);

 }
 elif ( ( c % 36 ) == 18deg ) {
 message("--  ", c);
 goto([diameter/2,-,0.0mm,-,-,c]);
 move([-,-,10.0mm,-,-,-]);
 }
 elif ( ( c % 36 ) != 0deg || ( c % 36 ) != 18deg  ) {
 message("-   ", c);
 goto([diameter/2,-,0.0mm,-,-,c]);
 move([-,-,7.0mm,-,-,-]);
 }
}

Interesting site with lathe dial reductions to suit different lead screws.
http://www.modelengineeringwebsite.com/Mini_handwheel_1.html

Eagle Surface Grinder Model 3 Rebuild - Planning

The surface grinder is made up of the following precision guided parts, a vertical column, a knee, a cross slide saddle, and a horizontal table.

The machine is build in a typical column knee setup as seen in horizontal milling machines.
The column has two parallel and one perpendicular planes.
The knee has two perpendicular planes.
The cross slide has two perpendicular and two parallel planes
The horizontal table has on plane

Starting at the biggest surface first and then working my way back seems to make the most sense. This includes all surfaces on a specific component. ordering the components by guide ways surface area yields this sequence.

• Vertical Column 2 x 800x50mm flat+ 2 x 800x30mm Dovetails
• Knee  2x300x50mm flat + 2x300x50 dovetail + 2x400x50 flat + 1x400x50 dovetail
• Table 2x 800x50mm flat + 2x 800x50mm dovetail
• Cross slide 2x 200x30 flat + 1x200x30mm dovetail + 2x400x30mm flat + 1x400x30mm dovetail
• Gib's with two surfaces 60Deg, 3 x

Planned steps and sequence:

• The table was surface ground to be used as a template.
• Build a holder for all three angular flat gib's 
• Scrape in all flat and angled surfaces of the gib's so they can be used for templates later.
• Build indicator jig for measurement, geometry and dimensions to provide 3 point contact to measure all surfaces in need of scraping
• Scrape Column front side flat, using the feed table, this will preserve the original machined surface on the center of the column. indicator jig should provide 3 points of contact on the original machined surface and two on the dovetail surface, to measure dovetails.
• pre scrape knee vertical slides with straight edge or gib as template.
• align vertical and scrape horizontal slides of knee on surface plate
• pre scrape knee right side dovetail using the knee's gib as template.
• Fit knee on column and scrape column dovetails to match,
• finish scrape knee vertical slides.
• pre scrape cross slide flat ways and align on surface plate
• pre scrape dovetail ways using the gib's as templates
• scrape knee side on cross slide using the knee as template, align to column.
• scrape table side of cross slide using the table as template align to column and knee
• use the knee with planing attachment on the feed table to machine a recessing center column, 
• would give a nice sharper like finish, maybe when I have energy left at that point.