LUXXO · SHARED DESIGN · READ ONLY

Eight-station Geneva indexing demonstrator v1

A hand-cranked rotary indexer: an external 8-slot Geneva drives a Ø240 table with eight removable Ø35 nests; one input shaft also carries a probe cam and an ejector cam whose lifts fall entirely inside the Geneva dwell. A six-station variant comes from setting stations=6, which regenerates the geometry and timing.

Files

STEP · AP214Exact solids for CAD/CAM STLMesh for 3D printing Drawing PDFA3, sections, hole & weld tables DXF flat patternsLaser / plasma cutting, zip

Flagged by the engineer

The 8-slot Geneva has a peak acceleration about 5x that of a cam indexer, so do not crank fast with heavy nests.
The locking arc has backlash of about 0.2 mm. Add a spring detent if probe accuracy below 0.05 mm is needed.
For n=6, a=55 mm and the pin circle grows. Check the guard clearance and keep C at 110 mm.

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Specification

Index angle	360/n = 45° (n=8)
Timing n=8	Index 0-135°, dwell 135-360°; probe 195-335°, ejector 215-315°
Timing n=6	Index 0-120°, dwell 120-360°
Geneva n=8	C 110, a 42.1, R 101.6
Geneva n=6	C 110, a 55.0, R 95.3
Frame legs	SHS 40x40x3, EN 10219
Overall size	367 × 280 × 367 mm
Parts	27
Material	Steel (S235)
Mass (calculated)	21261.6 g
General tolerance	± 0.2 mm (ISO 2768-m)
Process	welded

Standard parts · purchasable

4×	Deep groove ball bearing 6004 ISO 15
4×	Socket head cap screw M6x16 ISO 4762

Parts list

01	base_plate 360 × 280 × 12 mm · 9495.4 g
02	leg_1 40 × 40 × 150 mm · 522.8 g
03	leg_2 40 × 40 × 150 mm · 522.8 g
04	leg_3 40 × 40 × 150 mm · 522.8 g
05	leg_4 40 × 40 × 150 mm · 522.8 g
06	base_cover 260 × 180 × 2 mm · 734.8 g
07	geneva_wheel 167.53 × 167.53 × 10 mm · 1195.2 g
08	driver 92.09 × 79.98 × 16 mm · 252.9 g
09	table_shaft 20 × 20 × 140 mm · 345.3 g
10	input_shaft 20 × 20 × 140 mm · 345.3 g
11	bearing_1 42 × 42 × 12 mm · 80.2 g
12	bearing_2 42 × 42 × 12 mm · 80.2 g
13	bearing_3 42 × 42 × 12 mm · 80.2 g
14	bearing_4 42 × 42 × 12 mm · 80.2 g
15	table 240 × 240 × 15 mm · 4806.5 g
16	nests 224.9 × 224.9 × 15 mm · 605.2 g
17	probe_cam 60 × 71.85 × 8 mm · 189.3 g
18	ejector_cam 60 × 71.84 × 8 mm · 180.2 g
19	follower_bracket 60 × 12 × 8 mm · 25.1 g
20	probe 8 × 8 × 50 mm · 19.7 g
21	ejector 8 × 8 × 40 mm · 15.8 g
22	guard 264 × 264 × 40 mm · 516.9 g
23	crank 81 × 16 × 46 mm · 95.8 g
24	bolt_1 10 × 10 × 22 mm · 6.6 g
25	bolt_2 10 × 10 × 22 mm · 6.6 g
26	bolt_3 10 × 10 × 22 mm · 6.6 g
27	bolt_4 10 × 10 × 22 mm · 6.6 g