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Thaddeus Hughes
2026-05-26 10:07:16 -05:00
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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. 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_back.jpg)
![](cbox_inside.jpg) ![](cbox_inside.jpg)
# Encoders
## TRAK Encoder Pinout ## TRAK Encoder Pinout
The encoders for both motors and the standard TRAK encoders use the same Amphenol CPC connector. The encoders for both motors and the standard TRAK encoders use the same Amphenol CPC connector.
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| 12 | A- | Yellow | | 12 | A- | Yellow |
| 13 | GND | Black | | 13 | GND | Black |
| 14 | A+ | Green | | 14 | A+ | Green |
![](ampconns.jpg) ![](ampconns.jpg)
## Linear Encoder Pinout (DB9) ## 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. 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 ## 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.* *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
![](mesa_cards.jpg) ![](mesa_cards.jpg)
## 7i37TA ## 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. 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.