Help with Cable Extensions for Drag Link Install

Hey Rob,

Cables

for connecting your new cables to the machine here are the

For doubt about these Molex/Amphenol connectors and better replacing them everywhere (while you’re at it), please see here.

For choosing cables:

  • If you have a spindle, see please see this.
  • For the trim router and the stepper cables, here.

If you want water cooling hoses later too, I suggest a profile of at least 15x40.

Emergency Stop

An Emergency Stop for a spindle is NEVER between spindle and VFD. This is written in the first pages of every VFD manual, even in the cheap Huanyang VFD manual!

An Emergency Stop for a spindle would not power off the VFD either, but activate one of the Intelligent Terminals on the VFD which you would have programmed to serve as ISO 13849-1 Safety Inputs, or similarly programmed to initiate the spindle stop command. You can wire an Emergency stop switch directly to the VFD, or make use of a ISO 13849 Safety relay such as a Omron G9SE (datasheet), wired as follows:

Omron_MX2__ISO13849-1_Safety
(Source: Omron MX2 User’s Manual)

Hitachi_WJ200__ISO13849-1_Safety_Wiring
(Source: Hitachi WJ200 Instruction Manual )

Further Reading

Has anyone considered drag chains?

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