Buying guide
Custom Encoder Disc RFQ Checklist: 20 Parameters to Send
Short answer
Send your CAD drawing (DWG/DXF) plus these 20 parameters. The more complete the list, the more accurate the quotation and the fewer sample iterations. Leave unknowns blank and tell us the application — our engineers will help fill the gaps.
Copy this table, fill in what you know, and send it with your drawing via the RFQ form or e-mail.
| # | Parameter | Example entry (illustrative only) |
|---|---|---|
| 1 | Substrate | Soda-lime glass / borosilicate glass / stainless steel / PC |
| 2 | Optical path | Transmissive / reflective |
| 3 | Encoding | Incremental / absolute / sin/cos |
| 4 | Outer diameter and tolerance | Ø50 ±0.02 mm |
| 5 | Bore and tolerance | Ø8 +0.01/0 mm |
| 6 | Thickness and tolerance | 1.0 ±0.05 mm |
| 7 | Incremental line count | 2500 P/R, A/B channels + Z index |
| 8 | Absolute bit count and code type | 17-bit, Gray code / pseudo-random code |
| 9 | Reading radius | R20 mm |
| 10 | Duty cycle | 1:1 |
| 11 | Pattern-to-bore concentricity | ≤ 3 µm |
| 12 | Line width tolerance | ±1 µm |
| 13 | Cumulative graduation error | In arc-seconds or µm |
| 14 | Readhead wavelength | 850 nm |
| 15 | Transmissive: optical density of opaque areas | OD ≥ 3 |
| 16 | Reflective: high / low reflectance | ≥ 85 % / ≤ 3 % |
| 17 | Coating and protective layer | Cr; with/without anti-reflective or protective coating |
| 18 | Operating temperature, speed, vibration | −20 to 85 °C, 6000 rpm |
| 19 | Samples, small batch, annual volume | 20 samples; 10,000 discs per year |
| 20 | Inspection report and packaging | AOI record per disc; antistatic packaging with separators |
The example column only shows how to fill each line — the values are not recommendations or ENC7 specifications.
Tips
- Tell us the readhead or interpolation chip model — it defines pitch, gap and signal requirements.
- For absolute discs, give the reading radius of every track.
- If you are replacing an existing disc, include its drawing and the encoder it goes into.
Related: incremental vs absolute · line count and resolution · incoming inspection