I rebuilt a Hardinge Superslant, but I don't have SOP information
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  1. #1
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    Default I rebuilt a Hardinge Superslant, but I don't have SOP information

    I rebuilt a Hardinge Superslant SB-3-GN. I have been running it for a month now and it has produced some beautiful results. The controller was replaced with the EMC/LinuxCNC interface. I have two jog wheels, one for X and the other for Z/W.

    The new control plate. Feed/Speed/Rapid controls. To be installed soon.

    User interface

    Cycles interface

    What the PLC and servos looks like



    I need to know a few things about SOP.

    1. Coolant
    I have never replaced coolant at a shop ever. The lathe came with a few gallons of coolant three years ago and since I got it working I have just added some water to. The coolant has blobs of grease in it. It is low on coolant. How does one clean/replace/dispose of coolant? What is the process for cleaning out the coolant?

    2. Turret setup
    How can I align the turret to the spindle? I placed a round-bore boring bar holder in the turret. Using a dial gauge in the spindle I found the bore out by 5 thou perpendicular to the X axis. I found the run out on the spindle to be under half a thou.

    3. Lubrication
    There is a pressure pot on the tailstock end of the machine. When I got the machine the regulator was leaking air. I replaced the regulator but do not know what to set the air pressure to. I cannot find that info. Not sure what oil to put in there too. I have way oil and spindle oil from my mill.

    4. Air leaks
    The turret and tailstock leak air. I found that the air motor valve on the turret was bleeding air heavily and replaced it. I then found that the turret lock valve was bleeding air through the valve. Not a lot, but noticeable. I am tempted to add an air valve to turn on/off the air to the turrets when the turrets are not spinning to reduce this air valve leak. Suggestions for fixing this?

    5. Oil leak on tailstock
    One time (only one time) I noticed a small trickle stream of hydraulic oil bleeding out of the air chamber on the tailstock. It did not trickle after that. No leaks since, but when it did leak it leaked about two cups of oil. I cannot find out why. I am keeping track of the oil in the hydraulic tank. Suggestions on fixing this?

    6. The collet draw bar
    I have never used a hydraulic draw bar. I have two 16C collets and one Kohm 3 jaw 170mm chuck. I see that I can change the hydraulic draw strength, but I do not 'truly' know what this means other than more pressure = more clamping. What should I know to safely use the collet chuck?

    7. Spindle drive maintenance
    The spindle motor is an original DC motor with 194 ohm resistance. It says it should be 180 ohm resistance. The break disk works, but I am unsure if there is maintenance for that. The gear for the encoder is a little worn. Is there any SOP for the spindle? Anything I need to check?

    8. Anything I should know about SOP of a Hardinge Superslant? Challenges and tips for running it? I have read the manual a few times.

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  3. #2
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    Nice job of that retrofit. I really like Gmoccapy. Cool that you got Andy P's lathe macros integrated with it.

    Sorry I don't have any answers to you questions. You might try asking Andrew Mawson on madmodder.net. He has repaired and retrofitted a bunch of industrial lathes.
    Mark

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    I would do brush maintenance on all your DC motors. The Siemens motor uses field weakening to get the higher RPM's. things can get quite ugly when brushes wear down and loose contact.

    Lubrication is way oil, I would replace the Hardinge unit with a motor driven SLR type by Bijur or others.

  5. #4
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    My main questions are not new controller questions or motor related. I have those working well enough. I am interested in how the Hardinge Superslant is maintained.

    Except for the spindle, the machine is brushless. The brushes on the spindle were replaced 6 years ago, and 3 of those years it sat in my shop not spinning.

    I will get on the way oil.

    I have priced out a new spindle, but unless I have a reason larger than 'I want to have a nicer spindle motor with slightly better control' and 'I want to mount a secondary spindle motor to do live tooling broaching', I will not likely touch the spindle. If it breaks, well, yeah, I will replace it. But as is, that part isn't broken.

    I am most interested in fixing the old coolant. What does one do with old coolant? How does one properly remove the coolant and sludge from such a machine?

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    Pump the coolant sump, and then hand clean it. The old coolant is probably considered hazardous waste. Deal with it as you see fit. Get some synthetic water soluable cutting fluid, mix per mfg's direction....

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    If this machine will see intermittent use I would suggest taking a look at Oemeta Hycut coolant. The bactericide and cutting oil are separate components letting you adjust/correct concentrations independently. Also a aquarium bubbler in the tank would probably be a good idea to make the environment as inhospitable as possible for bacteria growth.


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