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Type: Posts; User: Jim Dawson

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  1. Thread: Pully size

    by Jim Dawson
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    Re: Pully size

    https://www.pinterest.com/pin/672232681852220936/

    Picture 2. Replace the weight with the linear actuator. If it moves 18'' the ''S'' will move 36 inches
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    Re: Set up and run - Steel parts

    Would it not be more of a question of machine rigidity? How much torque can you throw at the machine before things start becoming unstable? Right now the motor is the weak link and stalls with no...
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    Re: tooling for Slant Pro

    Not exactly sure what you are asking. Shars sells boring bars with through coolant holes. Not sure I have ever seen normal turning tools with through coolant, but I'm sure that someone makes them. ...
  4. Re: is it possible Clearpath servo's do not provide encoder feedback?

    First let me say that I have used the ClearPath SK system for one retrofit and found it to work very well and easy to set up. I would use it again in a similar installation. This was to replace...
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    Re: tooling for Slant Pro

    I have a Hardinge Conquest 42 with a turret. I am using the right hand version. I think you would want the right hand version on any turret tool changer. On my manual lathe with a QCTP I use a...
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    Re: CNC Tube Bender

    You were the one that insisted that a gearbox was not acceptable and must be direct drive. A 50 KW servo would almost do what you want. Of course a 75 or 50 KW servo is ridiculous. You can find...
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    Re: CNC Tube Bender

    A servo motor drive is a good option, but it needs a gearbox.

    One option of a slow speed, high torque servo is the Mitsubishi TM-RFM series, for the torque required you would want the TM-RFM240J10...
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    Re: tooling for Slant Pro

    I bought an Accursize 3/4'' insert holder set from Amazon. ...
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    Re: CNC Tube Bender

    To get a servo motor with that much torque for direct drive you are going to need one in the 75KW range. There are some lower power, low speed, very high torque servo motors available, but it would...
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    Re: CNC Tube Bender

    Just to put this in perspective, first concider that 400 Nm is about the torque output of a mid-sized auto engine, and that number seems pretty reasonable for a direct drive tube bender. That would...
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    Re: CNC Tube Bender

    Let's start with your manual bender. What type is it? Linear or rotary? Mechanical or hydraulic? Then how much pull or push is required on the handle to bend the largest tube? You can calculate...
  12. Re: CNC converted G0602 is all over the place.

    That is actually pretty good. If it's repeatable then just adjust the X cutter comp to bring it into the target dimension. When setting up, I almost never hit my target dimension exactly, but a...
  13. Thread: Need Help

    by Jim Dawson
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    Re: Need Help

    My pleasure to help out.

    Given the problems you are having, it sounds like there may be some encoder issues. At least I think there are encoders on the axes, not 100% sure about that.

    Since...
  14. Thread: Need Help

    by Jim Dawson
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    Re: Need Help

    Steve,

    Your post is a bit confusing due to the nomenclature you are using. I think what you are looking for is a controller rather than a driver. I looked at both websites and it looks like the...
  15. Re: Incoming power voltage to my Haas causing power on issues

    I have a Haas TM 2-P and have mine jumpered the same way that you do. We are running on single phase. My normal line voltage has been about 245V up until a few weeks ago, then it dropped to about...
  16. Re: I bought a Multicam 48 plus, I am having trouble with software.

    Fusion 360 has both MultiCam HPGL and MultiCam ISO posts. The HPGL is something I don't recognize as being able to run a machine and has a .plt extension, but the ISO is standard looking G-code with...
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    Re: Servo motors

    I agree with Mactec54, DMM servos & drives. 750W will be fine for all axes, that's what I would use on my machine if I replaced the DC servos.

    No, you can not connect the glass scales to the...
  18. Re: directionalized electrical noise detector

    I would say you have a serious grounding issue, or a loose power connection on the mains. I can't believe any electrical noise would fowl up a plugin router, that is pretty much not possible. I...
  19. Re: Ball screw support bearing questions. Are $420 bearings necessary on this machine

    :D Sorry
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    Re: Budget CNC Mill under $2000?

    You might take a look at this thread https://www.cnczone.com/forums/newly-posted-classifieds-listings/379796-cnc.html
  21. Re: Ball screw support bearing questions. Are $420 bearings necessary on this machine

    If you want better accuracy out of the machine, install scales on the table and Z axis. Then close the loop at the controller level. I use 1 micron magnetic scales on my machines, a bit more bullet...
  22. Re: Ball screw support bearing questions. Are $420 bearings necessary on this machine

    Maybe you can find some less expensive bearings here https://www.vxb.com/searchresults.asp?Search=7204&Submit=
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    Re: Hard Turning a Clean Sharp Edge

    Yup, what Ian said.
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    Re: Budget CNC Mill under $2000?

    If I were in your position I guess I would be looking for a used knee mill. Sometimes you can find them pretty cheap, although the prices seem to have gone up in the last few years. I paid $1000...
  25. Re: Break away torque calculation of lock nut against rotating/acceleating bolts?

    I think there is more going on here than just the acceleration torque on the nut. My best guess that there is some relative movement between the rotor and the nut under high acceleration and that is...
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