BGL
Hot Rolled
- Joined
- Sep 14, 2010
- Location
- Maryland, USA
So last episode we lost the vector drive on my1992 VF-0, yea last post I said it was 1997, to late to fix it then. In any case, we sent the unit out had it repaired and reinstalled it, seems fine, start/stop, M03/M04, orient - seems fine!
I Ran the long warm up routine, takes 30 min to get to 7k for one min. I then went to install a tool and felt the spindle nose was warmer than usual. A check of the diagnostic page shows 84 degrees but this is the outer casing not the shaft itself. The drive lugs and taper were hot, too hot to keep in contact with! Mother always said I would make a poor devil has I have a sensitivity to temperature - quick check with an infrared thermometer shows 135 degree at the taper section. I have run the warm up before the death of the drive and though I never took the temperature it was always warm to the touch never hot. Ok, so you’re thinking - the drive has nothing to do with the spindle temp other then possibly over-speeding it; checked the rpm with a handheld digital tachometer, rpm is fine. This is the set up, more to the story and then the question.
As Paul Harvey would say: “Page two"
While the drive was out I took the time to replace the pressure gauge on the air regulator to the spindle lube/air line. The original gauge was broken and it bothered me that I had no idea what it was. Once the drive was back in and machine was powered up I set the pressure from the 12psi showing to the 17 that the manual states. So I was running the spindle at 5psi more then before. Now with the spindle heating up a comment in the manual gets me to thinking: ”12K &15K Spindles require higher pressure to slightly reduce the delivery speed and amount of oil”. So is it possible that this older spindle - it has the little bronze breather on the back side that air flows out when the spindle is turning, my thinking is it requires lower pressure to push more oil because of the lower restriction??
My manual is not the original, it is dated 2006 and the online updated one states the same 17psi for the VF series and 20psi for the high speed spindles.
So the question in my simple mind is: Is 17psi correct for this older design? Is there a way to trigger the spindle air/oil solenoid without running the spindle so I can confirm the oil flow, or can I just run it at a very low rpm. I’m thinking I should disconnect the line at the spindle and measure the oil output over time. 1.5 to 2.5cc every four hours per Ken Foulks posting.
My apologies for the lengthy dissertation, I’ve been drinking…
I Ran the long warm up routine, takes 30 min to get to 7k for one min. I then went to install a tool and felt the spindle nose was warmer than usual. A check of the diagnostic page shows 84 degrees but this is the outer casing not the shaft itself. The drive lugs and taper were hot, too hot to keep in contact with! Mother always said I would make a poor devil has I have a sensitivity to temperature - quick check with an infrared thermometer shows 135 degree at the taper section. I have run the warm up before the death of the drive and though I never took the temperature it was always warm to the touch never hot. Ok, so you’re thinking - the drive has nothing to do with the spindle temp other then possibly over-speeding it; checked the rpm with a handheld digital tachometer, rpm is fine. This is the set up, more to the story and then the question.
As Paul Harvey would say: “Page two"
While the drive was out I took the time to replace the pressure gauge on the air regulator to the spindle lube/air line. The original gauge was broken and it bothered me that I had no idea what it was. Once the drive was back in and machine was powered up I set the pressure from the 12psi showing to the 17 that the manual states. So I was running the spindle at 5psi more then before. Now with the spindle heating up a comment in the manual gets me to thinking: ”12K &15K Spindles require higher pressure to slightly reduce the delivery speed and amount of oil”. So is it possible that this older spindle - it has the little bronze breather on the back side that air flows out when the spindle is turning, my thinking is it requires lower pressure to push more oil because of the lower restriction??
My manual is not the original, it is dated 2006 and the online updated one states the same 17psi for the VF series and 20psi for the high speed spindles.
So the question in my simple mind is: Is 17psi correct for this older design? Is there a way to trigger the spindle air/oil solenoid without running the spindle so I can confirm the oil flow, or can I just run it at a very low rpm. I’m thinking I should disconnect the line at the spindle and measure the oil output over time. 1.5 to 2.5cc every four hours per Ken Foulks posting.
My apologies for the lengthy dissertation, I’ve been drinking…