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You could try clamping a lathe tool in your vice and truing the FACE of the spindle where the collar on the TTS sits, I do believe they recommend this on their website, and it is what I had to do to mine.
JTCUSTOMS
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First post on CNCZone. 3yrs lurkin. Great forum.
I have a G5966 mill w/R8. In practically new condition pckdup a month ago. Have major runout using TTS 1/2" tool holder and new Jacobs 5/8" keyless w/TTS conversion. The runout happens when the works are tightened against the spindle. 0.0045" runout measured inside the holder bore. When I lower the TTS holder about 1/4" below the spindle and tighten, there is 0.0005"-0.001" runout. Same goes for the Jacobs using a 1/2" mill.
Also, ckd runout of spindle and spindle face-ok.
Spent hrs and dont know why its getting the runout. Miked the TTS conversion shoulder(dont know what they call it) for square-within 0.0005". and emeryed everything, spindle, R8 collet, etc.
One other, the holders dont come loose(fall out) when the drawbar is loosened. I have to rap the top of drawbar.
Any suggestions to ck?
Last edited by kNucklBustr; 09-11-2011 at 01:06 AM.
You could try clamping a lathe tool in your vice and truing the FACE of the spindle where the collar on the TTS sits, I do believe they recommend this on their website, and it is what I had to do to mine.
JTCUSTOMS
"It is only when they go wrong that machines remind you how powerful they are."
Clive James
That was my next logical step, but the spindle face runout showed less .0005. Ill do it, done everything else.Originally Posted by cornbinder23
btw- Really great post on your 11x26 conversion. Inspirational. Bought a YCL1126 yesterday, used like new.
Gotta figure what pokeys are used for.
Pokeys is just a device that allows you to "emulate" keystrokes with a pushbutton instead of the keayboard, It has evolved into quite the little device as I don't enen use a quarter of the functionality of it, but it works great if you want to build a control panel instead of using the mouse and keyboard.
And thank you for your kind remarks on my conversion, It is not quite finished yet(they never are) still have a few things left on the punchlist but it is coming along, let me know if you need any thing for yours if you are converting it. After looking at it, it is definitly the same lathe with a little different headstock casting, which looks just like the G0602
JTCUSTOMS
"It is only when they go wrong that machines remind you how powerful they are."
Clive James
Tormach manual states to face the spindle if it shows more than .001". They should change it to say face spindle no matter what the deviation is.
I took about .001 or so off, now runs dead on.
Torquing the drawbar, as reccomended by Tormach, to 40ft/lbs does remove some runout. Still, the keyless Jacobs has .004". Jacobs says they are good for .0015". Oh well.
I fiinally received a 3/4" ER20 straight chuck. I cut the end off, installed the TTS washer and got about .003-004" runout using a 1/2"end mill in a 13-12mm collet. It never ends.
I read a Parlec manual on the ER20 collets and one of the specs is torque at 60ft/lbs. That required placing the chuck in a vise and using a deep socket to torque the nut. It did work .0005" runout.
Is all this really needed to use this TTS? or should I have stuck w/R8? My plans are CNC conversion but so far have drilled 1 hole .
Ugh, just about to purchases a set of TTS tooling. Just to clarify, in the end, the run out is fine after the spindle facing and properly torquing the ER collet?
Ya, the spindle facing is the trick, new mill or other wise.
Seems this system heavily relys on squareness of the TTS washer against spindle.
Ya better call first and ask what is in stock. The only tools I was able to get was the 1/2 mill holder, TTS washer conversion. Everything else was purchased outside Tormach, but is quality tooling.
These guys are giving great info. But just to make sure, you are not going to use the mill bit in the jacobs for milling, right?
No... only for ckg runout, now using a piece of drill rod.
I have a TTS end mill holder and collets for that.
Jacobs JPK130J6 and jacobs arbor. I assumed these were quality products. Problem is, the arbor cant be removed w/out disassembling the chuck.
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