Spindle indexer help please

[Len-Tikular]

I'm back to converting my Boxford TCL160 after quite a long break.
I'm using ESS Smoothstepper with a CM106 BOB and MAch3 Turn
The Spindle and X and Z axis are now all working.
I now need to hook up the original encoder to give me the speed of the Spindle.
The disc on the end of the spindle shaft has 100 holes and on the outer rim there is one hole.
There is a dual slotted opto used to sense the speed. is has 4 wires, yellow,red,blue,green,

I need to hook these into my breakout board which is a CM106

[m_c]

What's the model/part number on the sensor?

[Len-Tikular]

OPB866T55
RS306-061

Two of them mounted and offset.

[m_c]

First up, as you're using Mach with an ESS, you'll only need the single slot (that's unless Warp9 have finally added the multislot capability they've been promising for however many years).

You'll need to add a resistor to the LED supply. You need a voltage of 1.2V at 20mA over the LED, so assuming a 5V supply, you need a 190ohm resistor. I think - I'm a bit tired, and not worked it out for a while! (5-1.2v)/0.02A = 190ohm
Or at 24V, a 1140ohm resistor (1.2K should do)

Do you have the input specs for the BOB?
It may be easier to connect directly to the ESS, as by the looks of your schematic, the inputs are all 24V, so you'd need a buffer board/circuit to boost the sensor output.

[Len-Tikular]

Attachment 20862
Many thanks, heres the diagram of the opto's as they are configured on the lathe. Modified sketch included along with Spec
Can you help with the connections to
Green, Blue, Red and Yellow.

George

[Saracen]

That looks to me as though you have the LEDs and transistors transposed, so the LEDs should be on the right and the transistors on the left.

If that were the case, green would be ground, yellow would be power and the red and blue would be your inputs.

Adrian.