Ken,

Not saying this is your problem, but some circuits are so sensitive that the current flow through the LED will give a 'false' non-touch condition. The reason reversing the leads caused Mach3 to work is that the LED then became a blocking diode.

Try bumping the resistor value up to 1k or even 1.5k. LED may be dim, but it may allow both LED and probe to work.

IMHO it is very unlikely that the LED is the problem. LEDs are pretty generic and most have the same electrical characteristics. Since is lit up on the 1st Econo-Probe, it's not blown.

If anyone has a problem with an Econo-Probe, PM me and we (Wildhorse Innovations) will work with you to solve it, even to the point of repairing it ourselves if necessary.

We also have two special offers for fourm members. Discount code 'EP10' will give you a $10.00 discount on Econo-Probe, Econo-Probe Kit or DRO-350 Complete Kit. Also, we can offer 5% discount off of most all items from Shar's online catalog. PM me with a list of items you want and I will get you a quote.

(If anyone in the forum has purchased an Econo-Probe or DRO-350 in the last 30 days, PM me with your order number and we will issue a refund so that your total price paid equals the coupon price.)

And as always, you can save an additional 2% on ANY order by paying by check or money order.

Quote Originally Posted by apeman88 View Post
FYI in the LED in the WH probe. I bought one 2yrs ago a few months after it was available. Could never get the LED to work right... if it lights up... it won't be detected in Mach3... reverse the wires and it works in Mach3 but LED will not light up. I just ordered and received my 2nd WH probe (gonna use one for tool setting) and the new probe works perfectly (LED lights up and detected by Mach3 as well). The new probe is using a 560 ohm metal resistor and the old probe was using a 390 ohm carbon resistor. Tried putting in a 560 ohm and still the same. The problem is the old LED... emailed Arnie and he's gonna ship me the new LED to replace.

So if your WH probe is not working right... you might have the old style probe with old LED.

Ken