Stepper Motor Cable upgrade to shielded 18awg
Now that the cable is here I measured the actual diameter of the cable to determine the connectors I need to rewire the stepper motors.
The cable insulation is 7.9 to 8mm in diameter so I decided to use GX16 butt joint aviation connectors at the stepper motor. I’ll get about the right amount of compression on the cable jacket to give a secure connection (specified at 6.5mm opening when tightened down).
I originally intended to use GX12 but they would have been too tight. So I ordered the larger GX16-5 (5 pin) butt joint connectors so I can run the 4 wires for the stepper and be able to run the ground wire through the extra pin in case I want to use it in the future.
The other end of the wires uses a Molex connector. After a bunch of research I found the part number of the existing Molex housings used on the stepper cables is 09508043 which should be the polarized version of the 4 pin connector. The pins for that connector that accommodate 18awg wire are Molex part number 08-52-0072. I’ll confirm that they’re the right stuff as they arrive but the aviation connectors have a long lead time (over 30 days). In the interim I’ll reassemble using the stock stepper motor cables to avoid the downtime. The pic below shows the version with more pins but I ordered the 4 pin version.
Today I hope to power up the VFD and start setting parameters. Thank you @Julien for the excellent list you compiled in another thread.