My personal shoptask website - Page 2

Page 2 of 5 FirstFirst 12345 LastLast
Results 13 to 24 of 52

Thread: My personal shoptask website

  1. #13
    Registered
    Join Date
    Nov 2006
    Location
    USA
    Posts
    2
    Downloads
    0
    Uploads
    0

    Default Ran accross your site while doing research...

    Hello,

    Great Site!!! Great information on the machine and projects.

    One question. On the pictures I see you have a DRO on your machine. Do you have any problems with jitter on the Z axis DRO due to vibration from the mill motor?

    I just upgraded to the latest version of the Shoptask El Dorado and have problems with the low order two digits of the Z DRO changing values. It seems to be related to vibration when running the Mill motor.

    Thank you for the detailed info on the motor teardown/repair. I am a victim of the lathe and mill motor gremlins as well. How are your motors working since you installed the MOVs in series?


    GAndrade



  2. #14
    Registered
    Join Date
    Feb 2006
    Location
    us
    Posts
    1187
    Downloads
    0
    Uploads
    0

    Default

    The battery rebuild. ..... I love it. Keep up the good work.



  3. #15
    Registered dahui's Avatar
    Join Date
    Dec 2005
    Location
    USA
    Posts
    183
    Downloads
    0
    Uploads
    0

    Default

    Hey,

    I do in fact have problems with my X axis jittering. I wanted to change the resolution from .0002 to .0005 but my manual appears to be wrong. When I try the procedure it changes some other setting, not the DRO resolution.

    If anyone knows how, this is for the Jenix DRO...I suppose asking JT might be productive. I had some luck by fidgeting with the cable where it enters the scale and making sure the loop wasn't putting as little pressure as possible on the scale.

    My motor has been mostly okay since installing the MOV's. Sometimes I get a little brrrrp but I can clear it by jogging the motor in reverse. Right now I'm running a pair of 175V. This is probably way too much but it seems to help. You might try a 200v or 250v...or double up a couple of 150's. That is a very high voltage will have some quenching action, but not as efficient as having juuust enough voltage across the MOV to keep it from burning out.

    Anyway, let me know if you find any z axis solutions. I'm actually looking into replacing the motors with some 1.5hp US made motors and a VFD...I figure that should eliminate a lot of the vibration.

    Thanks on the power drill mod as well. That was a satisfying one.

    cheers,

    Dahui



  4. #16
    Registered
    Join Date
    Nov 2006
    Location
    USA
    Posts
    2
    Downloads
    0
    Uploads
    0

    Default Jenix DRO Resolution Steps...

    Hello,

    The manual I have is for a 804 model Jenix DRO. Which Jenix DRO model do you have?

    You can download the manual from the Jenix Web page (www.dsjenix.com). When you get to the main web page select English in the upper right hand corner of the Web page then choose manual on the left side of the web page that appears.

    For my DRO, I can change the value and see more digits in the display being affected. When I change the resolution to zero for the particular scale I change, the readout does not change when the scale moves.

    In my opinion, the manual lacks detailed explanations of what the values and fields do.

    If you still have problems downloading the manual or have questions let me know.

    By the way, on my machine the X and Y axis scales are rock solid, no jitter at all. I have noticed that if the sliding portion of the scale is not located just right relative to the fixed portion of the scale per the installation instructions regarding tolerances listed in the manual the readout will jitter.

    Do you have a source for US made motors that are resonably priced?

    Thanks again for a great web page. I am planning to make a new set of knobs and a copy of the tool for turning rounds (balls). I hope it is ok to borrow from your idea.


    gandrade



  5. #17
    Registered dahui's Avatar
    Join Date
    Dec 2005
    Location
    USA
    Posts
    183
    Downloads
    0
    Uploads
    0

    Default

    My DRO appears to be a Jenix 703. I'll take a look for the manual. I don't have any issues with the X or Y axis jittering, just the Z. I did a bunch of adjusting and shiming to get the scale and the reader lined up as well, but it's still shaky.

    I'm hoping my new motor will run a lot smoother and eliminate some of that problem. I'll be using two 1.5 hp Baldor motors (TEFC) with a 145T frame and fabricating mounting brackets. I'd check out any local supplier for industrial motors. They aren't cheap. I'll be running a single Allen Bradley VFD for the time being and build a switching unit so I can use either motor on the VFD, but not both motors at once. What about the power-feed while milling? Eh, good question. I'm hoping to set up some sort of DC motor to drive the screw (mounted in the slot for the CNC motor) and build a control unit that works like the power-feed on a regular vertical mill. Probably causing more problems that I'm solving, but a second VFD isn't cheap either.

    If anyone has a suggestion for setting up a DC motor power-feed I'd love to hear it.

    As for the ball turner, I basically used Steve Bedair's design and tweaked it a bit. I may end up making a new base, instead of using the rotary base for my vise, because there are some clearance problems with the chuck if I want to work up close. Let us know how it goes.



  6. #18
    Registered sailandoar's Avatar
    Join Date
    Sep 2004
    Location
    USA
    Posts
    35
    Downloads
    0
    Uploads
    0

    Default

    Thanks very much for sharing.
    Great job on website !!!!



  7. #19
    Gold Member Bloy2004's Avatar
    Join Date
    Oct 2003
    Location
    Sturgeon Bay, WI
    Posts
    927
    Downloads
    0
    Uploads
    0

    Default

    I see you recently updated your site!
    I'll be watching....great reading and I like all the photos!
    If I can ever manage to leap into anodizing, you'll have been the inspiration.

    John (bloy)



  8. #20
    Registered dahui's Avatar
    Join Date
    Dec 2005
    Location
    USA
    Posts
    183
    Downloads
    0
    Uploads
    0

    Default

    Hey thanks a lot John. I spent a lot of time looking at your thread before I bought my ST. I love the paint job. Maybe some day I'll get ambitous and try a repaint, mine is flaking like a bowl of breakfast cereal.

    I've actually got a couple of questions if you wouldn't mind. The first is about the motorized column. I'd love to to this mod but have no idea what kind of motor I would need. Any hints? How do you limit the speed of the motor since it's hooked up on a 3 way switch?

    Also, I'm going to be hooking up new motors with a VFD and need to set up something to read the RPM. What's your source for the optical reader and display?

    I actually have a backlog of projects to put up and I hope to get to them in the next couple of weeks. Been a bit busy lately.

    Anodizing is pretty fun and great that I can do little bits and pieces at home. I just moved so I haven't gotten set up at my new place yet. I figure it won't take long to justify the cost of having small runs done at a shop. I'm not quite sure what I'm doing but so far the results have at least produced an anodized layer!

    Cheers,

    Jason



  9. #21
    Registered thkoutsidthebox's Avatar
    Join Date
    Nov 2006
    Location
    Ireland
    Posts
    1698
    Downloads
    0
    Uploads
    0

    Default

    That is one niceeee website. Great job on it and very interesting. Nice machine btw....Im also envious!



  10. #22
    Gold Member Bloy2004's Avatar
    Join Date
    Oct 2003
    Location
    Sturgeon Bay, WI
    Posts
    927
    Downloads
    0
    Uploads
    0

    Default

    Hi Jason,
    Happy New Year!
    The motorized column is just a single reversible gearmotor that switches either up or down at a reasonable rate to get the head near desired position.
    After I got mine installed, I thought maybe it could have been a little faster, but I'm happy with it....something like 22 seconds to go from all the way down to all the way up. I just hold the momentary switch on until the right height is reached, tighten the spider. Then the z axis does the rest.
    The motor I used was a shot in the dark from ebay. It's an Oriental Motor Co. motor 4RK25GN-AT that's tagged as 100VAC, 1250 to 1500 revs per min.
    the accompanying gearhead is 4GN12.5K. (does this mean a 12:1 reduction?)

    The sensor I'm using for spindle rpm was obtained from mouser... an omron part.
    part no. 653-EE-SN5V. I'll have to do some reasearch to find again what size resistor I used in the circuit. It's connections are covered in liquid electrical goop, and what notes I DID take are scribbled somewhere as yet undiscovered.

    John (bloy)

    Last edited by Bloy2004; 01-01-2007 at 12:11 PM.


  11. #23
    Registered dahui's Avatar
    Join Date
    Dec 2005
    Location
    USA
    Posts
    183
    Downloads
    0
    Uploads
    0

    Default

    More shamelss self promotion. I have some new updates on my site...actual machining projects this time!



  12. #24
    Registered dahui's Avatar
    Join Date
    Dec 2005
    Location
    USA
    Posts
    183
    Downloads
    0
    Uploads
    0

    Default VFD Conversion is Complete!

    Hi all,

    Just wanted to let people know I've finished my VFD conversion and posted the project on my site. Don't forget to check out the motor mounts for both the mill and lathe.

    I also repurposed the discussion link on my site to link to this thread.

    Also, thanks John (Bloy) for your help with the motorized mill column. I have also posted this project.

    cheers

    <br> <br>

    Last edited by dahui; 03-18-2007 at 02:41 PM.


Page 2 of 5 FirstFirst 12345 LastLast

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


About CNCzone.com

    We are the largest and most active discussion forum for manufacturing industry. The site is 100% free to join and use, so join today!

Follow us on


Our Brands

My personal shoptask website
My personal shoptask website