Spindle Speed Read Out In Mach3

[JimDawson]

I think this is the one I would go with in your application http://www.automationdirect.com/adc...ion/Standard_Sensing_Distance_(8mm)/AE1-AN-1F

Note: The above requires a 8mm Q/D cable, yours is a 12MM Q/D

This is the same specs as above with a attached 2M cable.
http://www.automationdirect.com/adc...ion/Standard_Sensing_Distance_(8mm)/AE1-AN-1A

 

[Transformer]

Thanks, I will try it. Dennis

 

[JimDawson]

I should ask, what exactly are you connecting this to. The question is because of the output. Your original is NPN (sinking) output, as are to ones I suggested, but PNP (sourcing) is available also.

 

[Transformer]

I am connecting into a Camtronics control unit which is based on a Gecko G540 drive. My objective is to get spindle RPM readout, readout only not control, in Mach3 so I can do CNC threading, G76 command.

 

[JimDawson]

Take a look at this thread on CNC Zone http://www.cnczone.com/forums/gecko-drives/112349-cnc.html

It looks like what you are doing now should work. I'm not quite sure why yours is not working.

 

[Jim_Hbar]

TR:

Inductive Prox's like your original choice can be a a real biotch to get working correctly - Been there, done that - got the tee-shirt.
One challenge is that they can have significant hysteresis..

Please refer to page 96 to 99 in the catalog you linked to...
It says that the target should be a square, with sides 3 times the sensing distance for the sensor, and there should be no other metal within a similar distance.
Optimally, the target should swing 1/2 of the sensing distance from the face.

Your original prox. is a 8mm shielded, with a 8mm sensing distance. So it would take a big lump to make it work reliably, and you will have created a significant imbalance on your machine.

The sensor Mr.Dawson linked to has a 1.5mm sensing distance, so will work much better - but be aware that you need to get it dang close to the target!!
Also, a flat-head or hex-head screw would be a better target than the pan-head that you have, and it should stick 5mm beyond the edge of the pulley.
Make sure your mount is rigid, and can hold the required clearance!!

 

[Transformer]

TR:

Inductive Prox's like your original choice can be a a real biotch to get working correctly - Been there, done that - got the tee-shirt.
One challenge is that they can have significant hysteresis..

Please refer to page 96 to 99 in the catalog you linked to...
It says that the target should be a square, with sides 3 times the sensing distance for the sensor, and there should be no other metal within a similar distance.
Optimally, the target should swing 1/2 of the sensing distance from the face.

Your original prox. is a 8mm shielded, with a 8mm sensing distance. So it would take a big lump to make it work reliably, and you will have created a significant imbalance on your machine.

The sensor Mr.Dawson linked to has a 1.5mm sensing distance, so will work much better - but be aware that you need to get it dang close to the target!!
Also, a flat-head or hex-head screw would be a better target than the pan-head that you have, and it should stick 5mm beyond the edge of the pulley.
Make sure your mount is rigid, and can hold the required clearance!!

 

[Transformer]

Thanks. Good stuff.