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Type: Posts; User: Jim Dawson

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  1. Replies
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    Re: Servo Drive Name Plate Queston

    By ''nominal'' I assume they mean that is approximately where it folds back or faults. You are correct that the wording is a bit confusing. But it is translated from Japanese.
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    Re: Servo Drive Name Plate Queston

    The continuous rated current is 52.2A. Permissible max current is 130A, intermittent.
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    Re: stepper motor questions?

    The picture doesn't look like a problem area. Maybe a little bump there, but I would not expect a skip. On the other hand, anything is possible. If that causes the gear to bind a bit right at that...
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    Re: Do manual pulse generators go bad?

    It's possible for the encoder (wheel) to go bad. I drop tested mine one too many times over about 4 years and it finally failed. I replaced the encoder and was back in business in a few minutes. I...
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    Re: stepper motor questions?

    Yes, acceleration only occurs at the start of a move.

    Another possibility is that when running at high speed, the stepper is reaching the max RPM limit for the voltage applied. Stepper torque...
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    Re: stepper motor questions?

    If it works most of the time, then I would look for some crud in the rack. As far as pinion/rack engagement, about the only spec I can suggest is ''comfortably snug''. You might also look at...
  7. Re: Best and worst controller era or series for spare parts?

    Do what I did on my antique (1989) Fanuc controlled lathe. Remove everything that says Fanuc on it and replace it with modern controls and servos. My total cost including the lathe was about US$...
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    Re: Teknic Servo drive Power supply

    That's not a regulated power supply so roughly VDCout * turns ratio = VACin *1.414. In other words, the PS is rated at 230VAC in, and running at 250V in would give you around 80V out.

    Is this a...
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    Re: A bit of advice needed

    We are a small manufacturer and went through the startup phase about 4 years ago. It was a big decision for us to move from manual machine prototyping to full on in house CNC machining. Our...
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    Re: 8L X and Z directions...

    I edited the posts above to correct an error on my part. The Home 0,0 position should be in the top RIGHT position Z(I originally said left)

    On any CNC lathe you have at least two coordinate...
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    Re: 8L X and Z directions...

    Depends on where the home switches are. Home normally would be in the right rear position.



    Carriage should move left,



    Z moving in the negative direction (counting down)
  12. Thread: Dynomotion

    by Jim Dawson
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    Re: Dynomotion

    Tom,

    I had a phone conversation last evening with Mark. We found a wiring error in the drive enable circuit that will soon be corrected. This would have been corrected some time ago, but the...
  13. Re: PM 1030V lathe convert to CNC help with hardware

    Why not just design and build your own system? You have a lathe, so if you have a mill it would be pretty easy. If you don't have a mill then it's time to buy one anyway. Looking at the ProCut...
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    Re: Switches In The USA ????

    Try this https://www.automationdirect.com/adc/shopping/catalog/pushbuttons_-z-_switches_-z-_indicators/22mm_metal#sort=undefined%20asc&start=0
  15. Re: Two Way Screw? Question About Tail Stock Screw On Power Kraft Wood Lathe

    It looks to me like it was installed backwards at one point and cross threaded. It looks like the long end is supposed to be left hand threads, and the short end is a right hand thread. There...
  16. Re: How to calculate wattage on cordless tools? Along with questions about brushed vs

    I have found the brushless (BLDC) motor power tools seem to have better torque and maybe a bit more battery life per charge than brushed motor powered tools. Calculating run time/charge is pretty...
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    Re: WHERE TO BUY LATHE SPINDLE IN EUROPE

    What kind of lathe spindle? How big and for what purpose?
  18. Re: Two Way Screw? Question About Tail Stock Screw On Power Kraft Wood Lathe

    That looks to be an Acme thread. Left hand on one end and right hand on the other. Maybe parts are available from somewhere. Failing that, the only option is to make one if you have a metal lathe,...
  19. Re: Steppers making noise but not spinning my lathe chuck...any advice?

    I would start by setting the DIP switches to 1/2 step and motor rated amps.
  20. Re: Steppers making noise but not spinning my lathe chuck...any advice?

    I don't think a multimeter would tell you much. Which + lead? There are two, A+ and B+

    Is the power supply maintaining 24V output when the motor is trying to run?
  21. Re: Selecting the correct Machine and Post-Processor in Fusion 360 for 6090 Mach3 G-C

    The Mach3mill G code normally works OK. Can you jog the machine from the Mach3 screen?

    You shouldn't have to do anything special. Is Mach3 throwing an error?

    The .cps files are indeed Java...
  22. Re: Steppers making noise but not spinning my lathe chuck...any advice?

    Are your Pulse & Direction signals reversed by chance?
  23. Re: Steppers making noise but not spinning my lathe chuck...any advice?

    By ''whirls'' do you mean the motor is making noise but the shaft is not turning?

    Post links to your hardware. Maybe some pictures of your setup.

    Normally glass lathes have a splined shaft...
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    Re: Teknic Servo drive Power supply

    As said, in most cases drives are only using a fraction of their rated power and rarely do two or more require full power at the same time. So you can get away with a smaller power supply and the...
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    Re: Teknic Servo drive Power supply

    It would output less voltage at the ratio of 240/400 = 60% of the rated output voltage. The power would also be derated.
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    Re: Teknic Servo drive Power supply

    That is a bit high, but not uncommon. My shop voltage used to run 249 to 252 until the power company changed out the transformer, now it's down to around 238 to 242.

    Once under some load the...
  27. Re: Haas Super Mini Mill - Controlling the Coolant Blast

    That is correct, no P-Cool on our machine.
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    Re: Teknic Servo drive Power supply

    The dirty little secret is that for the most part servo drives operate at a small fraction of their rated power 95% of the time. With only occasional momentary excursions to max rated power under...
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    Re: Teknic Servo drive Power supply

    Those Linmot units are spendy. But should work OK.

    Replacing the caps in the Automation Tech unit would be cheaper.
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    Re: Teknic Servo drive Power supply

    Not of the wiring is large enough to prevent substantial voltage drop. A slightly unbalanced input should not have any effect, it will most likely not cause anymore unbalance than you normally see...
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