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Thaddeus Hughes
2026-05-26 10:07:16 -05:00
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docs/WIRING.md
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# HEPHAESTUS Wiring
This is how I have my LinuxCNC machine wired. I put a linuxCNC box in place of a Southwestern Industries TRAK CNC II control box. I am reusing the TRAK drives, motors, and encoders. Eventually, I switched to using linear encoders instead of the TRAK encoders.
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![](cbox_back.jpg)
![](cbox_inside.jpg)
# Encoders
## TRAK Encoder Pinout
The encoders for both motors and the standard TRAK encoders use the same Amphenol CPC connector.
@@ -33,7 +36,9 @@ The encoders are differential 5V output. They might have an index pulse but I wa
| 12 | A- | Yellow |
| 13 | GND | Black |
| 14 | A+ | Green |
![](ampconns.jpg)
## Linear Encoder Pinout (DB9)
I switched to some linear encoders that have a D-sub connector. They are also 5V differential output, and nearly the same resolution, resulting in very easy switchover.
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## DB37 Pinout
The DB37 cable contains drive signals and motor encoder signals.
The DB37 cable contains drive signals and motor encoder signals and connects to the TRAK drive box.
*This pinout was determined by probing. I'm not sure what some of the pins do; some of the ??? pins might actually be an index pulse or something.*
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# MESA Cards
![](mesa_cards.jpg)
## 7i37TA
Three enables are used - one for the X and Y axes, one for the z axis, and one for the spindle. This allows the z axis to be disabled independently for manual drilling operations.