Diskussion:Nova 35
Aus FabLab Region Nürnberg
Hardware
- RDC6442G Herstellerseite
- Network aware laser cutter security
- RDCAM Reverse Engineering
- RDworks + Manuals
Protokollanalyse
- Capture mit Wireshark
- Datei > Paketdissektion exportieren > Als JSON
- Packet summary line
- Include column headings
- Packet details:
- As displayed
- Packet Bytes
- Packet summary line
- some more pat foo
rdcam.py
pat magic
Data format
- Byte = 1 Bit Message Start Indicator + 7 Bit Payload
- Only one message (checksum + command) can be sent per UDP package
- Max UDP package size 1472 bytes including checksum; fragmented by simple cutting (even inside a command)
Checksum
2 Bytes - sum of scrambled message bytes; MSB first.
Checksum has to be send before message.
Values
| Value | Lenght | Description |
|---|---|---|
| ABSCOORD | 5 Bytes | absolute position relative to job origin in µm |
| RELCOORD | 2 Bytes | relative position in µm; signed (2s complement) |
| SPEED | 5 Bytes | speed in µm/s |
| POWER | 2 Bytes | power in 0,006103516% (100/2^14) |
| CSTRING | variable zero terminated |
Commands
| Byte squence | Description | how sure we are |
|---|---|---|
| C6 01 <POWER> | 1st laser source min power | 99% |
| C6 21 <POWER> | 2nd laser source min power | 99% |
| C6 02 <POWER> | 1st laser source max power | 99% |
| C6 22 <POWER> | 2nd laser source max power | 99% |
| C9 02 <SPEED> | movement and/or (not sure) cutting speed | 80% |
| D9 00 02 <ABSCOORD> | move X | 99% |
| D9 00 03 <ABSCOORD> | move Y | 50% |
| D9 00 04 <ABSCOORD> | move Z | 50% |
| D9 00 05 <ABSCOORD> | move U | 50% |
| CC | ACK from machine | 99% |
| CD | ERR from machine | 99% |
| DA 00 XX XX | get XX XX from machine | 99% |
| DA 00 04 05 | saved job count | 99% |
| DA 01 XX XX <VALUE> | response to DA 00 XX XX | 99% |
| A8 <ABSCOORD> <ABSCOORD> | Straight cut to absolute X Y; turn laser on with configured speed and power | 99% |
| A9 <RELCOORD> <RELCOORD> | Straight cut to relative X Y; turn laser on with configured speed and power | 99% |
| E7 50 <ABSCOORD> <ABSCOORD> | Bounding box top left? | 30% |
| E7 51 <ABSCOORD> <ABSCOORD> | Bounding box bottom right? | 30% |
| E8 02 E7 01 <CSTRING> | Set filename for following transfer (transfer needs to be done really quickly after this!) | 90% |
| E8 01 XX XX | Read filename number XX XX | |
| 88 <ABSCOORD> <ABSCOORD> | straight move to absolute X Y as fast as possible; with laser off | 99% |
| 89 <RELCOORD> <RELCOORD> | straight move to relative X Y as fast as possible; with laser off | 80% |
