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Type: Posts; User: barchdesigns

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  1. Re: Replacing old Fanuc AC Spindle Drive with Delta VFD-E and Arduino

    Metzenw, I have not converted that, but I have that same Sin Cos signal on my old analog Bridgeport scales/readout. I experimented with it a bit, but ultimately found that it was easier to replace...
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    Re: Arduino Tape Drive Emulator for Fanuc 6

    It's great to see this thread with some activity! I actually just recorded a 5 min video for a shop owner who called me asking for information and it would be helpful to share here too. This is how I...
  3. Replacing old Fanuc AC Spindle Drive with Delta VFD-E and Arduino

    Right, which is what started this whole journey. I have much larger machines with Fanuc Axis motors and a Fanuc Spindle motor and was looking for a way to control them with alternative to a Fanuc...
  4. Re: Replacing old Fanuc AC Spindle Drive with Delta VFD-E and Arduino

    Thanks, this community has been a lot of help.




    cncmanual.com
    Search for "fanuc" and it comes up with just about everything. I'm guessing the old manuals are past the copyright protection...
  5. Re: Replacing old Fanuc AC Spindle Drive with Delta VFD-E and Arduino

    Your waves look good coming from the encoder. No need to test RA and RB as you are already seeing the square waves created from them and they look fine. It has to be really far off (like 10% valley,...
  6. Re: RS485 ModBUS talking to Delta VFD-E via Arduino replacing Fanuc AC Spindle Drive

    Last night I got a Fanuc Alarm 2 on my AC Spindle Drive (LED 2 was lit up on the drive) "Excessive Speed Deviation" So I thought I would post how I use the oscilloscope to tune in the encoder...
  7. Re: Replacing old Fanuc AC Spindle Drive with Delta VFD-E and Arduino

    Wow, This sounds exactly like the same problem I had a while back. I was getting speed deviation errors. Turns out NOTHING was actually bad. Really......it was just adjusting 2 potentiometers on the...
  8. Re: RS485 ModBUS talking to Delta VFD-E via Arduino replacing Fanuc AC Spindle Drive

    The hardest part of interfacing the Delta drive running the Spindle Motor was using the existing encoder feedback from the Fanuc Motor back to the Delta drive. We had to build a custom circuit that...
  9. Re: Replacing old Fanuc AC Spindle Drive with Delta VFD-E and Arduino

    I was surprised a VFD company doesn't have a drop in replacement as well, that's why I did this DIY approach for a few years. Ultimately I ended up finding sources for cheap new transistors and caps...
  10. Re: Replacing old Fanuc AC Spindle Drive with Delta VFD-E and Arduino

    I got this far into the project and then decided it was getting cheaper and cheaper to buy old working used Fanuc drives as spares, so I haven't taken this project any further in the last 2 years....
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    Z Axis Gib Adjustment on Vertical CNC

    I'm trying to figure out how to tighten/adjust the Z Axis Gibs on my vertical CNC Milling machine. I have a decent understanding of how Gib adjustment systems work on other machines, but this one is...
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    Re: Fanuc Spindle has low power

    Both machines just completed a full run of parts simultaneously at max RPM and it went fine. No spindle speed issues at all.

    I installed a 40HP rotary style (which uses a heavy 300lb 33kW idler...
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    Re: Fanuc Spindle has low power

    An unexpected pleasant surprise! My face mill cuts look nicer. Previously I could see oscillations in the cut, even though it felt smooth. I bet that was from the spindle drive starving for power to...
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    Re: Fanuc Spindle has low power

    Well so far so good. I was running Thing 2 at max RPM cutting medium heavy cuts (load was about 90%) and it stayed strong even while Thing 1 was cutting/changing tools/spinning up.

    I'll let both...
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    Re: Fanuc Spindle has low power

    Yes, I now have 2 awg aluminum going to the machine (2-2-2-2). I had 8 awg copper (8-8-8-8) a few days ago, but my 3 phase company suggested going higher. There was no difference in load readings...
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    Re: Fanuc Spindle has low power

    CJ, yes it is a geared spindle setup. Both machines are 6,000 RPM motors, but Thing 2 is geared 1.2:1 so 5,000 RPM at the spindle in high gear. Thing 1 is geared 1:1 so it goes to 6,000 RPM and it...
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    Re: Fanuc Spindle has low power

    After putting Thing 2's spindle drive in Thing 1 to see what would happen it runs the spindle just fine. The load meter stays low even at max RPM. So both drives run Thing 1 spindle ok, but both...
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    Re: Fanuc Spindle has low power

    The motor is an AC Fanuc Model 3 A06B-0704-B001 (which Fanuc tells me is discontinued and replaced by A06B-1003-B150) That replacement number doesn't seem right to me, but maybe...

    I called Fanuc...
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    Re: Fanuc Spindle has low power

    I swapped the spindle drives between the machines last night and this machine still has low cutting power. I'm starting to think there's a problem with the motor itself. Since the spindle turns with...
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    Fanuc Spindle has low power

    I've got an old Fanuc AC Spindle drive A06B-6044 on a Fanuc 6M controlled machine. The spindle motor is a Fanuc 3.

    I can't figure out why this machine has low spindle "power" compared to it's...
  21. Incoming Power Issue, or Transistor Issue

    I'm working on tracking down a power issue. I'm not sure if the issue is related to the incoming power to a machine, or if the issue is a bad transistor in the Spindle Drive...hoping someone can help...
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    Re: Arduino Tape Drive Emulator for Fanuc 6

    My reader head went to some circuit boards too, but when following the traces along the circuit board, the reader head wires were just routed directly to the 50 pin on the circuit boards....look...
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    Re: Arduino Tape Drive Emulator for Fanuc 6

    Look closely at the pictures and you can see where I added an SD shield with Network on top of the Arduino. This allows the Arduino program to just read a text file right from the SD card. No need to...
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    Re: Arduino Tape Drive Emulator for Fanuc 6

    I'm not familiar with Yasnac controls, but I would guess it would be a similar process if the tape drives are similar technology. Basically all I did was look at how the reading head worked at the...
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    Re: Arduino Tape Drive Emulator for Fanuc 6

    *paing* In my Arduino project I had to also use a 10th wire (works like CTS, Clear to Send) that is driven high and low from the NC side which the Arduino needs to listen to. It tells the Arduino...
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    Re: Arduino Tape Drive Emulator for Fanuc 6

    Hi, We didn't use a protocol. We literally just turned the 9th pin high or low by a delay function. The Fanuc tape reading head just turns 8 wires high or low and the 9th wire is like a firing pin....
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    Re: Jerky Small Straight Line Moves

    That's exactly what I was hoping to achieve with my retrofit, but I hadn't seen it done on a machine of your size yet. Originally I was thinking of replacing all the spindle and servo drives but it...
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    Re: Jerky Small Straight Line Moves

    Actually it's not much surfacing at all. Here is a real world example of my shop's parts that has a toolpath with many small straight line moves. I'm not sure if links to products are allowed on this...
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    Re: Jerky Small Straight Line Moves

    Ahh the ever problem with PC's lasting more than a few years..... I used to drip feed on some old Fanuc's where we had to buy a $100 computer just to have it sit next to the machine and drip feed it....
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    Re: Jerky Small Straight Line Moves

    Interesting. I guess I am already 80% the way there ... On my Fanuc 6 machine I have DC axis drives and a large AC spindle drive. The DC drives have an encoder on the end cap, and I can get an...
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