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erikjgreen Lagunmatic CNC 250 refurb 07-13-2011, 02:21 PM
LUCKY13 This will make for a very... 07-14-2011, 12:56 AM
Southbend Sam When you wire the phase... 07-14-2011, 03:46 AM
erikjgreen Sam and Lucky, thanks! The... 07-14-2011, 08:13 PM
Southbend Sam The phase converter I use is... 07-14-2011, 09:17 PM
erikjgreen Actually I have some... 07-14-2011, 09:42 PM
erikjgreen Got a few supplies 07-15-2011, 02:39 PM
erikjgreen Pics and plans 07-20-2011, 04:42 PM
erikjgreen Cleanup 07-22-2011, 03:54 PM
ebrewste I can't see enough info about... 07-25-2011, 01:25 AM
erikjgreen Encoders 07-25-2011, 01:47 PM
ebrewste That sounds like the only... 07-25-2011, 03:44 PM
erikjgreen Bit by bit 07-29-2011, 02:03 PM
erikjgreen Quick update 08-19-2011, 04:15 PM
erikjgreen Capacitor problems 08-31-2011, 02:51 AM
erikjgreen Okay... 09-06-2011, 03:52 PM
erikjgreen Progress... 09-07-2011, 03:07 PM
michaelthomas A machinist friend of mine... 09-07-2011, 04:48 PM
erikjgreen Converter 09-07-2011, 04:51 PM
michaelthomas I realized my question about... 09-07-2011, 05:23 PM
michaelthomas I can probably take it down... 09-07-2011, 05:25 PM
erikjgreen atm 09-07-2011, 05:32 PM
erikjgreen brake 09-07-2011, 11:27 PM
michaelthomas Give these a look. Let me... 09-08-2011, 03:29 AM
michaelthomas Here are some more. 09-08-2011, 03:41 AM
erikjgreen Yes, thanks for sharing... 09-09-2011, 07:27 PM
erikjgreen Wires, wires, wires 09-12-2011, 02:58 PM
michaelthomas Hi Erik, Can you tell me... 09-17-2011, 03:37 PM
michaelthomas Never mind.......lol. I... 09-17-2011, 04:38 PM
erikjgreen Weekend work 09-19-2011, 07:23 PM
erikjgreen Computer 09-28-2011, 03:19 PM
erikjgreen Okay.. 01-09-2012, 04:48 PM
erikjgreen I've been working on wiring,... 01-19-2012, 09:23 PM
erikjgreen Whee 01-24-2012, 05:14 PM
erikjgreen Forgot to mention, for future... 01-24-2012, 05:20 PM
erikjgreen Got the other two axes'... 01-25-2012, 05:04 PM
erikjgreen I didn't get any more wiring... 01-27-2012, 04:53 PM
erikjgreen Hmmm 09-08-2011, 02:36 PM
erikjgreen Ahhhh 09-09-2011, 06:13 PM
caracadon Re: Pics and plans 06-03-2016, 03:04 PM
erikjgreen Re: Pics and plans 06-03-2016, 06:34 PM
mungaro Eric Eric: I have a... 01-30-2012, 05:57 AM
mungaro Eric: What are you going... 01-30-2012, 06:00 AM
erikjgreen The old controller (dynapath... 01-30-2012, 04:52 PM
erikjgreen Also, over the weekend I... 01-30-2012, 04:58 PM
mungaro Eric: I will have the... 01-31-2012, 12:54 AM
erikjgreen That would be great! The... 01-31-2012, 04:35 PM
mungaro Lagunmatic 01-31-2012, 07:31 PM
mungaro Eric: I sure would like... 01-31-2012, 07:35 PM
erikjgreen Email sent. Not much work... 02-01-2012, 04:16 PM
erikjgreen Wires and more wires 02-06-2012, 05:42 AM
erikjgreen I also found a good step by... 02-06-2012, 04:32 PM
erikjgreen Research 02-07-2012, 09:22 PM
erikjgreen Okay, I finally got some more... 02-17-2012, 04:58 AM
samco What version of emc are you... 02-17-2012, 08:27 PM
samco Yes - you want to enable the... 02-17-2012, 08:33 PM
Al_The_Man Off the bat you should not... 02-10-2012, 06:06 PM
erikjgreen Mostly I was adjusting... 02-11-2012, 11:31 PM
erikjgreen Okay, I've been researching... 02-13-2012, 10:23 PM
erikjgreen Time for another quick... 03-14-2012, 09:43 PM
samco TI 99/4a Alpiner? 03-14-2012, 09:50 PM
erikjgreen Heh... I don't actually... 03-15-2012, 03:08 PM
erikjgreen I spent the weekend fiddling... 03-19-2012, 06:41 PM
Greenbuggy Erik, your PM box is full. ... 06-27-2012, 06:54 AM
erikjgreen Fixed it 06-27-2012, 03:27 PM
erikjgreen Hmm, as long as I'm typing... 06-27-2012, 03:33 PM
erikjgreen Phew... time for another... 07-27-2012, 02:45 PM
will gilmore Keep up the good work! You... 11-09-2012, 05:22 PM
erikjgreen Will - You can check to... 11-09-2012, 06:11 PM
erikjgreen Bunches of updates here, in... 11-19-2012, 04:03 PM
erikjgreen Time for some pics 11-21-2012, 03:53 PM
Al_The_Man I have never seen a... 11-21-2012, 04:50 PM
Al_The_Man I don't think you can see... 11-26-2012, 06:57 PM
erikjgreen Well, I decided to bite the... 11-27-2012, 04:38 PM
jsantos Hey Erik, It's been... 12-06-2012, 07:13 AM
erikjgreen Thanks Joe... I've been... 12-06-2012, 03:37 PM
erikjgreen Update time 12-10-2012, 06:38 PM
erikjgreen Long time 01-23-2013, 05:46 PM
erikjgreen Got the adjustment done last... 01-24-2013, 04:32 PM
erikjgreen I got the new ballscrew in,... 01-29-2013, 07:30 PM
aarongough Sounds like you're getting... 01-30-2013, 12:38 AM
erikjgreen Getting closer. 02-04-2013, 03:56 PM
erikjgreen I did some more work over the... 03-11-2013, 04:35 PM
samco Hi Erik Blowing by the... 03-12-2013, 02:28 PM
erikjgreen Yes, I have home switches... 03-12-2013, 03:25 PM
erikjgreen I really, really need to post... 05-07-2013, 07:34 PM
erikjgreen Still going... I've got... 05-17-2013, 03:56 PM
Murlin Wow you have done allot of... 06-10-2013, 12:31 PM
erikjgreen No, but my draw bar controls... 06-10-2013, 02:51 PM
Murlin Thanks allot Erik... Ya... 06-10-2013, 03:03 PM
erikjgreen Do this: First, start a new... 06-10-2013, 03:23 PM
Murlin Will do man and thanks ! :) 06-10-2013, 03:39 PM
rule308x Hey Eric, I finally started... 06-13-2013, 02:53 AM
MachiningMouse Re: Lagunmatic CNC 250 refurb 10-05-2021, 06:08 PM
  1. #1
    Join Date
    Sep 2005
    Posts
    322
    Forgot to mention, for future reference in case anyone else converts one of these: The encoders are differential "three wire" type, meaning they have A, B, and index outputs.

    So each encoders has 8 physical wires connected.... A and -A, B and -B, Z and -Z (or, in the lagun diagrams, "marker") and GND and Vcc (+5v).

    I'll post a pic plus the wire color code later, once I get the other axes' encoders wired up.

    Erik

  2. #2
    Join Date
    Sep 2005
    Posts
    322
    Got the other two axes' encoders hooked up, and neatened up my wiring a bit. No limit switches yet, ran out of time.

    I'm going to order a Hitachi WJ-200 VFD today, and I've been thinking about the spindle pulleys.

    Does anyone know how much/if the spindle pulleys on a variable speed mill head will create backlash for operations where the direction of the spindle reverses?

    The existing head has a speed range from several hundred up to 4000 rpm depending on which gear range I use, selected by a crank that connects to a chain in the head, which adjusts the speed pulley diameter. With the VFD, I won't generally need to adjust that, and I'm wondering if I should replace it with a timing belt setup.

    The spindle encoder I'm planning will have an index for absolute positioning, and I'd like to "know" exactly what position it's in with as little backlash as possible. Anyone who has done this and replaced that belt/pulley?

    Erik

  3. #3
    Join Date
    Sep 2005
    Posts
    322
    I didn't get any more wiring done last night, but I did verify (via counting rotations) that all three axes are 2:1 ratios. Assuming the servos can get up to close to their no-load speed (2500rpm) with a load, then I should get (2500/2)/5=250 inches per minute rapids max.

    I am not seeing as much lubricant as I would think normal getting onto the ways from the Bijur lube system, so I've got to check the tubing and whatever the end fittings are called. The spindle lube works fine.

    The hitachi VFD I ordered can use an external braking resistor for higher braking performance, although it has a built-in one too. I want to be able to insta-stop the spindle for tapping among other things, so I'm going to see if I can find a surplus 250watt or so resistor at a local surplus place. I also want to install AC line reactors to protect the vfd electronics and help the spindle motor run cool.

    I'm also going to pick up a few solid state relays so I can power on and off the coolant pump, task lighting, the vfd, servo amps, and compressed air from the Mesa I/O card. Basically, powering on the mill with the cabinet lock will boot up the computer, which can then use the Mesa to power up everything else. That also means I can use e-stop to cut power to all those items if I want.

    Erik

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