Increase motor_base hole clearance to 5mm

Signed-off-by: Arnaud Morin <arnaud.gfpv@mailops.fr>

motor_base.py

@@ -31,7 +31,7 @@ SPAR_MORTISE_ANGLE = 45.0           # +-45 deg to the arm axis
 MORTISE_L = TENON_L + FIT       # 4.2
 MORTISE_W = THICKNESS
 
-BORE_D = 4.0             # 1404 bell / boss clearance
+BORE_D = 5.0             # 1404 bell / boss clearance
 BOLT_SQ = 9.0            # 1404/1105 M2 pattern -- the DIAGONAL between
                          # opposite bolt holes, not the square's side
 BOLT_D = 2.2             # M2 clearance

standoff.py

@@ -8,12 +8,21 @@ from frame_params import PLATE_GAP
 
 OD = 3.5                 # round M2 standoff
 ALU_DENSITY = 2.70e-3    # g/mm3, for mass reporting
+PLATE_GAP=16
 
 
 def standoff():
     p = (cq.Workplane("XY")
          .circle(OD / 2.0)
-         .extrude(PLATE_GAP))
+         .extrude(PLATE_GAP)
+         )
+
+    cut = (cq.Workplane("XY")
+           .circle(1)
+           .extrude(PLATE_GAP)
+           )
+
+    p = p.cut(cut)
 
     return p