Hardinge HNC Reduex 2

[Skunk]

Working on X- (8LS) and X+ (7LS) limit switches today. This lathe is equipped with the X home (9LS) switch but it is not hooked up. Looking at the drawings that came with the lathe it was not even called out. Well the yellow wire is called out, but go to an empty spot on the terminal block.

Anywho...X- is working fine. Hits the switch and travel in the minus direction stops as I would expect.

However, the X+ while it seems to be working in software, ie lamp on parameter 16 toggles when I manually toggle the switch, it does not stop the motion of the carriage.


added a video showing the messages when manipulating the switches by hand.
Any ideas for my next move?

[Skunk]

Ok, following the Centroid Hardinge Retrofit Manual rev 041104 I see I should be checking for limits and home to be set to 1 for Z-, 2 for Z+, 3 for X- and 4 for X+.

Not sure where to see this as referenced. If they mean Inputs 1 to 4 , I find them as inputs 13 to 16, which lines up with the parameter LEDs I see changing.

[Skunk]

I confirmed with a meter that I have continuity from the switch to the input, the LED confirms that, but wanted to make sure the wiring was correct.

[cncsnw]

However, the X+ while it seems to be working in software, ie lamp on parameter 16 toggles when I manually toggle the switch, it does not stop the motion of the carriage.

Presuming you mean that INP16, on the Alt-i display, changes from Green to Red when you trip the X+ limit switch, then the next step is to make sure that you have entered "16" as the X+ limit input number, on the Machine Configuration -> Motor Parameters table.

[Skunk]

Presuming you mean that INP16, on the Alt-i display, changes from Green to Red when you trip the X+ limit switch, then the next step is to make sure that you have entered "16" as the X+ limit input number, on the Machine Configuration -> Motor Parameters table.

Yes that is what I meant. Thanks for the direction, will go take a peek and see what it has.

[Skunk]

Bingo! Thank you!!

[Skunk]

I see from the pic I did not have one of the X+ home was not set either. That took a few minutes to realize when I was trying to "set" home.

[Skunk]

I was working on the coolant pump Thursday. Wired it up on Low voltage in Delta configuration and hooked up the smallest Capacitor I had on hand. I could feel a Hum on the casing, but no coolant. On and off trying a few different things and smelled smoke. Not good.

Next day reached out to my high school friend that is an industrial electrician. He suggested going to Low voltage eye configuration since it was most likely wye to begin with. No luck. I decided to tear jt apart and see how bad I smoked it.

Both bearings were rusted solid. Cut them off with a handheld grinder. Got two replacements. Cleaned up the armature and out it back together. Reconnected wires and crossed my fingers. It works. So I have coolant now. Buttoned everything up and got a "first chips" video made. Now I need to find some tooling.