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Type: Posts; User: jmelson

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  1. Replies
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    Re: losing counts on BOSS8 encoders

    Crazy problem! It was the knock-off indicol dial test indicator holder that I was using. It was slipping just a little each time I did a back and forth move. I did have one encoder that was dirty,...
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    735

    Re: Kwik Switch 200 tooling

    And, I am STILL looking for Kwik Switch 200 tooling. I have a FEW collet chucks and end mill holders. I am looking for a 2 or 3" face mill, but the pickings on eBay are real slim and very...
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    912

    losing counts on BOSS8 encoders

    I thought I was about done with my R2E3 retrofit project. But, doing some testing, I found it was losing a little bit of position when moving. Every axis shows this, but it is worst on the Y axis. ...
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    Re: XSY-AT1 programming tips

    I have a XSY-AT1 VFD on a 2 HP Bridgeport mill. The motor is wired for 240 V. I have been trying to get the torque boost to work right over a range os speeds. If I turn P72 up it works great at low...
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    735

    Re: Kwik Switch 200 tooling

    Right, I am just looking for arbors that fit the Kwik switch 200 spindle taper and can take my Jacobs chucks and shell mills. I have managed to get some collet chucks and end mill holders already....
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    735

    Kwik Switch 200 tooling

    Hi, I have just finished a retrofit on an R2E3 with Kwik Switch 200 taper. I need to find some tooling for it. Especially a 1 Jacobs taper arbor and a shell mill arbor.
    I have some shell mills...
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    Need AMC 30A20 servo amps

    I'm in the middle of a retrofit of a Bridgeport R2E3, and decided to use AMC 30A20 servo amps to replace the NC400 it came with.
    I have one working 30A20AC amp, and another eBay special that doesn't...
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    2,228

    R2E3 Schematics?

    I just dragged home an R2E3 that seems to have good iron, but the control is a mess. I will be doing a retrofit, but that would be vastly easier if I had the schematics, rather than having to trace...
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    623

    GT7R5G-2 need to control remotely

    We have a Huan Yang GT 7R5G-2 VFD that works fine from the front panel, but we can't seem to figure out what parameters to set for remote control.
    We have gotten our DAC voltage to control the...
  10. Allen Bradley 7320 CNC control parts available

    Anyone need any Allen-Bradley 7320 parts? I have a complete system here that worked last time I used it. I have all the manuals, and CPU and I/O boards. Anybody need anything? I'm eventually...
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    687

    Re: need cross reference on Beta M encoders ?

    I'm pretty sure from the docs I have that there are at least 32K and 64K encoders in the Beta series.
    I make a converter for the Fanuc serial encoders that converts them to look like a quadrature...
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    687

    Re: need cross reference on Beta M encoders ?

    Ah, I was looking at the wrong field in the part number. It seems that in the B275 field, the 75 specifies a (Beta)A64B encoder. Can anybody confirm this?
    Apparently, his encoders do NOT have...
  13. Replies
    3
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    687

    need cross reference on Beta M encoders ?

    Hello,

    I have a guy who needs a retrofit on a robot with Beta M motors. I need to make sure I know what encoders are on the motors.
    These are (Beta)M0.4, 0.5 and 1, part # A06B-0114-B275#0008,...
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    889

    CHNC-I limit sensors

    We are retrofitting a 1986 CHNC-I that originally had the General Numerics control. The axis servos and drives were already replaced with Parker/MTS brushless motors/drives, and we now have those...
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    1,969

    Re: spindle drive for CHNC-I

    I have a very hard to read pic of the plate, I don't see those words there. We will do the shorted test.

    The machine was NOT running. I'm not sure to trust the sellers 3rd person report of what...
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    1,969

    Re: spindle drive for CHNC-I

    Right, the MOTOR will certainly not run off single phase. it needs a VFD of some sort. I was wondering if the Fanuc spindle DRIVE would accept single-phase power.
    But, I'm pretty sure the moroe is...
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    1,969

    spindle drive for CHNC-I

    A friend just got a CHNC-I and we are planning a retrofit. The servo amps and axis motors have already been replaced by prior owner. It still has the original spindle motor (A06B-1006-B220#2000)...
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    Re: Need S20T arbor for drill chuck

    Levil doesn't sell a drill chuck for direct spindle mount. Geez! So, the best I could come up with was a small Jacobs chuck and a 3/8" straight shank to JT2 arbor, and mount that in a 3/8" collet...
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    336

    Need S20T arbor for drill chuck

    We got a Levil mill that has the S20T spindle taper. We got a few ER16 collet chucks with it, but would like a drill chuck, too. Seems these are REALLY hard to find!

    Does anybody know where to...
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    Re: Got my Fanuc red cap servo motor running!

    OK, then, it really ought to work, then!

    Jon
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    Re: Got my Fanuc red cap servo motor running!

    32 KHz should work fine. 3.3 V will work OK, too, for the PWM signal. But, it appears to have PWM without a direction output. Our servo amps were designed for a sign-magnitude scheme. If used...
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    Re: Got my Fanuc red cap servo motor running!

    72 V DC will work, but you won't get full speed from the motor. This may not matter with a rotary axis. The motors usually have the voltage needed to achieve rated RPM on the nameplate, often 120 -...
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    Re: Got my Fanuc red cap servo motor running!

    No, you don't need 3-phase mains power. That is a totally separate issue from the motor using 3-phase power to move it. That 3-phase power is generated by the servo amp.

    So, there are a couple...
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    Re: new drive for Panasonic Minas S series motors

    GREAT! Now that you have a motor there with the right protocol, you can examine it at your leisure, and it proves
    your drives are OK, too.

    Jon
  25. Replies
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    7,393

    Re: new drive for Panasonic Minas S series motors

    Well, are you sure the drive supports the motor you are trying to connect? I've never worked with the Panasonic
    drives, I just got some motors cheap on eBay quite some years ago. I make my own...
  26. Replies
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    7,393

    Re: new drive for Panasonic Minas S series motors

    Glad you were able to figure this out! I didn't know about the reverse order of the complement bits, I didn't use those
    in the converter I made. I'm guessing bit 7 is a parity bit.

    Have you...
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    Re: new drive for Panasonic Minas S series motors

    OK, I'll try to get a scope on it this weekend. It is 5 V differential, as in 26LS31 / 26LS32 type drivers.

    Jon
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    Re: new drive for Panasonic Minas S series motors

    I'm a little vague on this, but my recollection is that the first 3 bits are the 3 commutation signals, then the next 3 bits are the
    complement of those signals. I don't recall, but I don't...
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    Re: new drive for Panasonic Minas S series motors

    It has been quite some time since I did this, so my memory is a bit vague. But, looking at the code I wrote, it appears the data
    is at 1 Mbit/second, and I think the first 3 bits are the Hall...
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    Re: new drive for Panasonic Minas S series motors

    I don't remember the exact format, but 10 bits total sounds right. I make a converter board to do this. It generates the classic Hall
    signals. See Pico Systems : Panasonic Encoder Converter...
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