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Type: Posts; User: jcdammeyer

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  1. Replies
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    Re: PathPilot, Mesa 7I92H and Geckodrive G540

    Very late to the party. I've been playing around with a Raspberry Pi4 running LinuxCNC with a MESA 7i92H and a couple of far east Break Out Boards. Not happy with the gmoccapy interface for the...
  2. Re: The UHU parts list, questions and improvement.

    The Novakon is the direction I've decided to go but for now with a stepper motor and probably an encoder on the back of it.
    484404
    The 14mm keyed output shaft of the 25:1 planetary gear couples...
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    Re: Stepper-Driven Power Drawbar

    Hi Bill,
    Oh Crap. I just realized I dropped (or added) a zero in all my calculations. So my 25:1 harmonic drive is not going to work with the motor I have which after testing is looking a little...
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    Re: Stepper-Driven Power Drawbar

    Hey Bill,
    What type of air cylinder?
    Bidirectional?
    Or one direction and return springs send it back up?
    Mine is bidirectional so one valve sends it down and then it stays there. The other...
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    Re: Stepper-Driven Power Drawbar

    Thanks.
    That helps a lot. I had my air pressure at 90 PSI because of the butterfly impact wrench. Now I can turn it down and better regulate the flow so the cylinder doesn't slam the assembly...
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    Re: Stepper-Driven Power Drawbar

    Bill,
    I do have a question about how yours operates. I can see how the spindle is locked with the toothed wheel which is bolted to the nut which captures and probably even sets the bearing preload...
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    Re: Stepper-Driven Power Drawbar

    Mine has two hall effect sensors. One for the socket to detect number of turns before it is told to stop. In hindsight more than one PPR will be more useful. The second sensor tests if the socket...
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    Re: Stepper-Driven Power Drawbar

    Thanks. The only threads I can find with that subject use the belville washers compressed which then release the tool.

    Ray's version in this thread is very similar to what I designed other than...
  9. Re: The UHU parts list, questions and improvement.

    I've been looking at my HP_UHU boards and have a question. (A couple actually).
    My boards are marked Rev.10.b 12/2007

    R54 feeding the VR16 reference pot has been shorted out and there's a 1N4148...
  10. Re: The UHU parts list, questions and improvement.

    That's exactly what I had in mind! He uses two air cylinders and has the spindle brake so he can turn the nut until it engages. That's been one of my problems with nut rounding happening when the...
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    Re: Stepper-Driven Power Drawbar

    Nicely done. I was just given the link to this thread. I've been working on the same thing for my combination R8 and TT holders. The Butterfly Wrench approach sucks! I've got a hall sensor to see...
  12. Re: The UHU parts list, questions and improvement.

    I've been here before so to speak. What you see in this photo is a servo motor controller by CAN messages into a 100:1 reduction drive which goes into another reduction drive. The square aluminum...
  13. Re: The UHU parts list, questions and improvement.

    I like how he addressed the issue of pressure on the spindle bearings.
    Also the mill shaper behavior for cutting the splines in the disk.
    I didn't see how he replaced his TT Holder R8 collet...
  14. Re: The UHU parts list, questions and improvement.

    I tried the 3/8" electric ratchet. Perfect for torque. But needs mechanical adjustment to change direction. The mechanism internally appears to be more like an impact wrench with a rotating hammer...
  15. Re: The UHU parts list, questions and improvement.

    Thanks Hugo,
    I have a project in mind for one of my UHU or HP_UHU boards. Hence some of the questions.
    I use both R8 and an R8-TT collet on my mill. So most of the tools are in TT holders that...
  16. Re: The UHU parts list, questions and improvement.

    Thanks. I used the numbers I had off the top of my head for my Bergerda AC Servos. Actually the original motors I was using were:
    Skewed Rotor Design:
    Constant Torque: 1.6 N-m ( 226 oz-in)
    Peak...
  17. Re: The UHU parts list, questions and improvement.

    Quick question about the current limit settings. Looking at the schematic of 1.0c or d there's a VREF and a VREF_OC. VREF is a lower voltage than VREF_OC but it's the input into the slow_limit RC...
  18. Re: The UHU parts list, questions and improvement.

    I've had better success with keeping licenses. In fact although I have Altium I still maintain a number of projects in 99SE. The last version I paid for was Altium 18. Runs on both WIN-7 (my main...
  19. Re: The UHU parts list, questions and improvement.

    Up until mid June my Windows Home Server was reliably backing up WIN-XP, WIN-7, VISTA and WIN-10. Now it still does those but something in one of the microsoft databases for WIN-7 has been...
  20. Re: The UHU parts list, questions and improvement.

    Out of curiosity what are you using now for schematic and PCB layout
    Cheers
    John
  21. Re: The UHU parts list, questions and improvement.

    I don't think the boards for the HP_UHU are available anymore. Kreutz was the designer. Likely he may have a web link to gerbers etc. for making more boards. I can email things like parts lists...
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    Re: High Power UHU Thread (HP.UHU)

    Just a quick addendum to this. Here's a PDF of the schematic in that adapter board. In the photo from the previous post the left board is an Automotive Networking Board from Microchip that can take...
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    Re: High Power UHU Thread (HP.UHU)

    482700
    I have already done the initial upgrade to a PIC32 from the 8 bit PIC18. In the past I've used a 4 line display for a different project. The PIC will handle, with internal hardware, a...
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    Re: High Power UHU Thread (HP.UHU)

    Not totally a sad story. Learned a lot. In fact was just going through the box with the extra UHUs the day before your posting trying to decide what to do with them.

    I think the biggest problem...
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    Re: High Power UHU Thread (HP.UHU)

    Welcome back.
    My two HP_UHU drives have been temporarily retired. Turns out one of the two DC Servo motors I bought from https://www.automationtechnologiesinc.com/ was not the same as the other...
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    Re: Russian UHU by Hudognik

    Please do not apologize for your English. There will always be people who can speak multiple languages and can help with translating. For example my Dutch writing is terrible and some Dutch people...
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    Re: Russian Arduino Lead Screw Project??

    The Yahoo group is here:E-Leadscrew Yahoo! Group
    John
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    Re: UHU (and HP) Parameters

    Some progress this weekend.
    First of all, my original style UHU controller from Irfan has a DB-9F for the connection to the PC. That's pretty well standard for RS232 COM ports. Male on the PC...
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    Re: UHU (and HP) Parameters

    I have the Irfan UHU wired up to the motor with a 24V Supply. I'm using the ELS Rev 0.1 as a step/dir motion generator.372002
    I've also prototyped a small 24V to 15V power supply to run the HP-UHU....
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    UHU (and HP) Parameters

    I've found some time to restart a 9 year old project. I have a UHU drive (and unfinished HP-UHU)

    Say I wanted to use this motor:...
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