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  1. Does the lathe use contactors for the spindle? ...

    Does the lathe use contactors for the spindle? Does the contactor pull in with the M4 command? Maybe a bad contactor or wiring or the output from the controller to the contactor is bad.
  2. That's a good point about it being a safety issue...

    That's a good point about it being a safety issue - I may point that out to McMaster-Carr (the company that needs the info from me).
  3. Thanks for all the replies - the paper was very...

    Thanks for all the replies - the paper was very good.

    I am convinced that it is the lead in the solder (not the lead in the entire product) that needs to be held to 1000 ppm or less. The paper...
  4. ROHS calculation for leaded solder on circuit boards

    We use leaded solder for the components on the circuit board that controls our product. I'm not sure how the lead limits (1000 ppm for ROHS) are calculated. I assume it's on a component basis so...
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    If you are right on the edge (chatter/no chatter)...

    If you are right on the edge (chatter/no chatter) then wrapping some Sorbothane around the OD of the tube might help. Mcmaster-Carr sells it in sheets.
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    That pump will only put out 2.1 GPM at 400/900...

    That pump will only put out 2.1 GPM at 400/900 psi. I think you would want to look at a Hydraulic Power Supply (HPS) instead of building your own pump/motor/tank. Without a tank and a valve it will...
  7. Try slowing down the baud rate.

    Try slowing down the baud rate.
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    tough starting screws on "formed" threads

    I have #10-24 threads in aluminum. The guys in assembly are having a tough time getting the screws to start properly. It seems like the screws want to cross-thread. My procedure is to spot drill...
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    Do you have a built-up edge? If plunging, look...

    Do you have a built-up edge? If plunging, look at the bottom of the mill and make sure material isn't jammed in there.
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    The coming and going at a low rate frequently is...

    The coming and going at a low rate frequently is caused by 2 vibrations. They are close in their frequencies but not quite the same and they form a beat frequency. The speed it's happening at is...
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    That was is BobW - thanks for the help.

    That was is BobW - thanks for the help.
  12. Replies
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    Below is the code from one of the programs. ...

    Below is the code from one of the programs. Machine is a Hardinge VMC. Control is a Fanuc0i-MB. The offset screen uses the radius of the tool. I've had trouble using cutter comp on this machine...
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    trouble with thread milling G Code

    I'm trying to make a 3/8-18 internal pipe thread using a 4 flute, .37 Dia. carbide pipe thread mill. I've tried 3 of the online G code generators but I end of having the same problem with each. The...
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    I have a Cobra 42 and it does have rigid tapping....

    I have a Cobra 42 and it does have rigid tapping. It's an option you have to purchase. You should be able to purchase it from Hardinge and they will send in a person who will flip a few bits to...
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    Hard to see but it looks like the cutting corner...

    Hard to see but it looks like the cutting corner of your tool is quite worn. There's also a big exit burr which would indicate a dull tool.
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    I've heard about 5% for aluminum sand castings...

    I've heard about 5% for aluminum sand castings for shrinkage during solidification. There may be another 1%-2% for shrinkage when the hot solid cools to room temperature.
  17. Use gauge blocks and ring gauges to "calibrate"...

    Use gauge blocks and ring gauges to "calibrate" your feel.
  18. Replies
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    The reason depth is a problem is that the square...

    The reason depth is a problem is that the square head pipe plug that screws into the hole looks terrible when the threads are too deep and the plug goes in too far.

    It would be tough to make...
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    Holding pipe thread depth on castings that vary

    The castings I have vary a bit in height and I will be tapping a 3/8 pipe thread through the top wall of the casting (with a vertical CNC mill). Are there any tricks to control the depth of the tap?...
  20. We're a small firm and we get charged $12.50 for...

    We're a small firm and we get charged $12.50 for each address correction.
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    Yikes, 800 degrees? We've had several aluminum...

    Yikes, 800 degrees? We've had several aluminum pieces stripped. I thought it was done chemically. The 356-T6 aluminum won't like being at 800 degrees. I better check and see how our vendor is...
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    Thanks guys - I'll do some searching.

    Thanks guys - I'll do some searching.
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    Anti-Rust additive for water based cleaning?

    Is there something out there I can add to my aqueous cleaning spray tank to inhibit rust on steel parts? I used to use Armakleen from Safety-Kleen but I no longer use Safety-Kleen.
  24. How are aluminum castings supported during heat treat and quench?

    We have a batch of gear cases that came to us distorted on one face - bad enough that when the mating piece was bolted on, the assembly looked bad (off by about 1/16" at the worst spot on the...
  25. Thanks for all the suggestions - very helpful!

    Thanks for all the suggestions - very helpful!
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