Centroid Community CNC Support Forum

HARDINGE HNC LATHE REDUEX 2 PHOTO ALBUM




So I have had this lathe for a couple of years. Finally getting to it. This was converted to Centroid by someone else prior to me. Looks like they ran the motors till it puked and traded it in for something else.

The encoders for X and Z are attached to the ballscrews. The motors I recently picked up have the encoder mounted on the rear of the motor. I assume I can remove the existing encoders and use the ones located on these new motors?

I plan to share what I can as I progress.

please start a photo album and post link to album here so photos are all in one location as you add more over the course of the project etc..
here is how. https://centroidcncforum.com/viewtopic.php?f=60&t=6928

cnckeith wrote: ↑Mon Jan 13, 2025 4:21 pm please start a photo album and post link to album here so photos are all in one location as you add more over the course of the project etc..
here is how. https://centroidcncforum.com/viewtopic.php?f=60&t=6928

Done..

You may want to take a look at motor case length and clearance, for the X axis motor.

Usually on a Hardinge, the X axis motor is tucked down and inside on the back of the carriage, and it moves with the cross-slide. If the motor is much longer than the original Hardinge motors, then it will hit the back of the bed (preventing further X+ travel) before you get the cross-slide far enough forward to trip the plus home or limit switch.

You should be able to get a look at the X limit switches by removing a cover on the side of the cross-slide, in back, facing the headstock. If I remember correctly, there are three switches stacked up. The first one is the X+ limit; the middle one is the X+ home; and the deepest one in the cavity is the X- limit. Usually, we would ignore the old home switch and use the X+ limit switch both as limit and home. However, if you have to compensate for a slightly-too-long motor, it may help to use the middle switch (old home) as the X+ limit and home in your new setup.

One way to buy back an inch or two, is to remove the encoder from the X servo motor, put a minimum-depth protective cap on the end of the motor, and rely instead on the ballscrew-mounted encoder for position feedback.

Interesting you mention this. I was actually looking into this last night. Def not much room. The parts I plan to make are not all that big so I am hoping I can deal with the limits. I purchased 2 Harding maintenance manuals. One for an HNC and one for a CHNC. I have an HNC but the limit switches on the carriage cross slide are in the CHNC manual , not the HNC.

I managed to gain another 1.375 of X travel. Removed the encoder and made a new cap.

cool thanks for posting

Can you measure the length of the motor with the new cap? Mounting flanle to cap dimension.
THX

lavrgs wrote: ↑Tue Jan 21, 2025 8:27 pm Can you measure the length of the motor with the new cap? Mounting flanle to cap dimension.
THX

5.875" roughly. I do not yet know how to add the link to photos so they show up in reverse order. I have to say I have been watching your threads here as well as other places for some time now. You seem to be very thorough in your approach to things. I like what you did with adding a motor to spin the turret. I have yet to hook air up, maybe soon. Not sure what I might find.

My problem is having to use what I have on hand to make or fix things.

Working on the VFD wiring and ran into a bit of a snag.

Blue print calls out a RESET and a FAULT wire.

My Inverter TECO E510-210-H3-U, documentation offers a multifunctional input terminal S6 which defaults to 17 (Fault reset).
There are two other settings that include the word reset. 21 and 23, see picture that shows tabke for Group 03 External digital input and output parameters. Not sure what I need to use for wires 941 and 947.

The table omits S4 and has two S5 terminals, I assume this is just a typo. My understanding is that the S3, S4 and S5 are programmable to fit my needs.

Help?