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  1. Thread: Upgrading to DMM

    by boss4
    Replies
    39
    Views
    13,696

    Re: Upgrading to DMM

    I used these same servos to convert my Bridgeport CNC ~5 years ago. Still going strong and they work great.

    Misumi sells pullies with a large boss that will work with nearly no modifications to...
  2. Re: servo amplifier recommendations for a 3kw kawasaki servo

    I just wanted to update this for posterity incase anyone finds this in a search result. So this is a 12 pole brushless AC motor with sinusoidal back EMF having ~1.9mH inductance per phase. It has a...
  3. servo amplifier recommendations for a 3kw kawasaki servo

    I have a surplus 3kw kawasaki servo. I can't find a spec sheet for it anywhere but its listed on the label as being 3kw, AC200V, 18.5 amp, type: 3MC302G-3DRAE-KJ1B2.

    I intend to use it as a...
  4. Replies
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    1,196

    Re: series 1 iron, rigid ram vs V ram

    I have it now and I can confirm that it uses a bolt pattern in the column along with a couple of dowel pins. Apart from the extra holes the column looked identical and had been machined on the inside...
  5. Replies
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    1,196

    Re: series 1 iron, rigid ram vs V ram

    So I would need to drill a bolt pattern into the top of the column instead of using the spider?

    Do you think the difference would be worth about $300. I think that's about what the difference...
  6. Re: Brideport Boss 4: Time to retrofit whats my best option?

    I am browsing through the first few pages of posts and I know this is 4 months old so may be no longer relevant.

    When I retrofitted my mill i used DMM tech 750 watt AC servos in step direction...
  7. Replies
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    1,196

    series 1 iron, rigid ram vs V ram

    I have a series 1 V ram. It seems like every time I use something larger than a 5/8 end mill I have to re tram the head. It is mostly evident when facing (with a face mill) on work that is wider than...
  8. Re: modifying a lathe spindle for use as a 4th axis

    The original cast iron headstock casting has many complex features and is also a gearbox and is just way to heavy to make something that will be portable which is my intent. I believe it is in excess...
  9. Re: modifying a lathe spindle for use as a 4th axis

    Maintaining the rear bearings would heavily influence the overall design. If I use the front bearings only then I will probably make the headstock from a single block of material as I can readily...
  10. modifying a lathe spindle for use as a 4th axis

    I have procured rather cheaply a lathe spindle from a 14" 1960's U.S. made lathe. This is a rather stout piece about 24" long with 2 pairs of bearings 130mm and 110mm sealed ball bearings...
  11. Replies
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    2,110

    Re: new dyn4 autotune

    I would say that it probably mostly worked. Maybe I could have power cycle the servo and it might have finished. It would be interesting to see what gains it would choose. As it is I re-tuned...
  12. Replies
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    2,110

    Re: new dyn4 autotune

    It could be my setup but the autotune doesn't work for me. It picks fairly high gains in the first portion way into resonance. Then when it gets to the high acceleration part of the tuning the...
  13. Replies
    3
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    2,110

    new dyn4 autotune

    I have been up and running with a bridgeport boss4 knee mill and dmm dyn4 servos for a few years but I decided to make some tuning adjustments and low and behold there is an autotune function in the...
  14. Thread: DmmDrv.exe

    by boss4
    Replies
    6
    Views
    1,966

    Re: DmmDrv.exe

    they are DYN4-H01A2-00

    here is a photo:

    292858

    Thanks!
  15. Thread: DmmDrv.exe

    by boss4
    Replies
    6
    Views
    1,966

    Re: DmmDrv.exe

    Can someone send me the DMMDRV software please?

    I just got 3 drives with no software. Maybe put on drop box and send the link via PM?

    Or this Free File Hosting - Online Storage; Upload Mp3,...
  16. Replies
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    3,584

    Re: Servos for S1 BOSS machine

    I cut the center bore for the plates on a lathe. Although totally functional they are actually rather crude, the mounting holes are hand drilled. You might recognize one of them as the cast iron...
  17. Replies
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    3,584

    Re: Servos for S1 BOSS machine

    I think the mizuno pulleys worked pretty well. I did have to turn down the boss of the one for the Z axis, though it can be ordered this way. I also added a 3/8in hole into the z axis mount so that...
  18. Replies
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    3,584

    Re: Servos for S1 BOSS machine

    So almost a year later I ended up getting 86M-DHT-A6MK1.

    I havn't received them yet but it looks like they have 45mm (protrusion from servo) shafts so I think I can use off the shelf timing...
  19. Thread: Upgrading to DMM

    by boss4
    Replies
    39
    Views
    13,696

    Re: Upgrading to DMM

    Thanks for the advice. After a bit more searching I think this misumo pulley would work for X and Y un modified as long as the adapter plates are thin enough (~10mm), With no need for shaft...
  20. Thread: Upgrading to DMM

    by boss4
    Replies
    39
    Views
    13,696

    Re: Upgrading to DMM

    Is there a package deal with Drives + motors + encoders?

    I am planning on using 86M-DHT-72 motors with DYN2 drives.

    I emailed DMM for a quote; they don't make it too easy for window shoppers.
    ...
  21. Thread: Upgrading to DMM

    by boss4
    Replies
    39
    Views
    13,696

    Re: Upgrading to DMM

    I am planning to do the same upgrade and I am curious how you like it now that its in use?

    Also how did you put a keyway inside the blind shaft adapter?

    Finally where did you buy the DMM...
  22. Replies
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    3,584

    Re: Servos for S1 BOSS machine

    Mine is 1:1, just curious since I've never seen one, does the 2:1 use L series belts? I had considered changing to the 2:1. The Y and Z could be swapped with parts available from McMaster, but how...
  23. Replies
    19
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    3,584

    Re: Servos for S1 BOSS machine

    Those look very nice, which style worked out the best?

    I am between lathes at the moment, are any of these available off the shelf or otherwise for purchase?

    The only ones I can find clamp on...
  24. Replies
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    3,584

    Re: Servos for S1 BOSS machine

    I wouldn't be worried about interference between the drives and motors more so about interference generated by the motors, shielding is not a bad thing but I think its un necessary in this case.
  25. Replies
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    3,584

    Re: Servos for S1 BOSS machine

    Yes I am, and I do not think thats an issue, I am using shielded control cable between the controller and drives grounded near the drives. Shooting from the hip I would say there is allot more...
  26. Replies
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    3,584

    Re: Servos for S1 BOSS machine

    Thanks for the reply.

    The power supply is a Chinese 72v 20 amp toroidal transformer unregulated power supply with I think, 4 10K UF caps. I bought it second hand un-used along with the leadshine...
  27. Replies
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    3,584

    Servos for S1 BOSS machine

    I have a working Series 1 BOSS 4 machine with original steppers, generally in good condition using a Dynomotion KFLOP for control with older Leadshine step drives run from 80V power supply.

    I...
  28. Hi Tom, Got the glass scales on order. Quick...

    Hi Tom,

    Got the glass scales on order. Quick follow on?

    Would KFLOP be able to use the glass scales as the feedback mechanism to control brushed DC servos via connection to H bridges? The...
  29. Glass scales VS encoders for CL stepper operation

    I am soliciting advice on which feedback source to go with for a Mill.

    Its a Bridgeport boss4 cnc mill, currently running off the original nema 42 stepper motors via the original belt drive and...
  30. Replies
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    1,499

    Series 1 limit switches

    Hi,

    Does anyone have any pictures or a link showing the series 1 limit switches installed.

    I bought my Series 1 without the switches or control system. I see that the Z switch must install...
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