Emco Tool reverser

Emco Tool reverser

This topic has 5 replies, 3 voices, and was last updated 18 April 2026 at 16:47 by sparky mike.

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17 April 2026 at 21:57 #844927
sparky mike
Participant
@sparkymike
I need to know the pin identification on the four pin plug on the automatic tool reverser and also what correct voltage should be at that point. Is the reverser motor DC or AC ? Mike.
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18 April 2026 at 07:40 #844944
DC31k
Participant
@dc31k
Could you say what homework you have done in advance of posting your question?

Have you looked for a manual for the machine?

The toolchanger plugs in somewhere and the wiring diagram would tell you both the pin out and supply voltage.

There is an Emco group at groups.io who may have the manual in their download section if your prior searches have been unable to locate it.

How would the item work to ‘reverse’ a tool?
18 April 2026 at 07:56 #844946
sparky mike
Participant
@sparkymike
I have the hard bound Emco manual but the wiring digrams are not good to say the least. Emco call it a tool reverser, but I would call it a rotary tool changer.
18 April 2026 at 08:02 #844947
DC31k
Participant
@dc31k
Page 63 here could be a starting point:

https://archive.fablabo.net/mediawiki/images/1/10/33541911-EMCO-Compact-5-CNC-Maintenance-Manual.pdf

Some googling around ’emco toolchanger’ suggests it is a DC motor, driven on a timed pulse, so two wires will be supply and ground (manual above mentions polarity reversal). It is possible that the other wires are limit switches so the brain is informed of toolchange completion/success.
18 April 2026 at 09:09 #844953
Michael Gilligan
Participant
@michaelgilligan61133
It doesn’t answer the questions, but

For we the great uninitiated observers … here’s a short video of the device in slow action:

.

https://youtu.be/-kNYLt6ne_w?si=cfoLoMrc_m19DkNK.

MichaelG.

.

Sorry if it’s front-loaded with stupid YouTube adverts … Grrr!!
18 April 2026 at 16:47 #844981
sparky mike
Participant
@sparkymike
I found out in the manual that it was either 6volt or 10 volt supply and now conected a dc supply up to pins three and four with neg on three and pos on four and now working ok. (plug pins viewed in rainbow fashion counting from left to right.) It clicks at each point where it would send signal to control board to tell motor to stop, I assume through one of the other two pins. I have it up for sale at the moment, but did not want to sell it if there was any fault in the motor. Mike.
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