Open Source Boards Available, Stepper Drivers and Break Out Boards - Page 5

Page 5 of 39 FirstFirst ... 234567815 ... LastLast
Results 81 to 100 of 764

Thread: Open Source Boards Available, Stepper Drivers and Break Out Boards

  1. #81
    Registered pminmo's Avatar
    Join Date
    Jun 2003
    Location
    St. Peters, Mo USA
    Posts
    3312
    Downloads
    0
    Uploads
    0

    Default

    Konstatin,
    The 600 DPI is the scale. Depending on graphics application software you have to print it true size, don't check any boxes that say fit to page or similar.

    Phil



  2. #82
    Registered pminmo's Avatar
    Join Date
    Jun 2003
    Location
    St. Peters, Mo USA
    Posts
    3312
    Downloads
    0
    Uploads
    0

    Default

    Ok,
    I think I figured out a true acrobat (pdf) file for toner transfer. Please double check image for size and orientation. Thanks, Phil
    1 axis:
    http://webpages.charter.net/pminmo/1axisttcopper.pdf
    tach's 3 axis:
    http://webpages.charter.net/pminmo/3axisttcopper.pdf



  3. #83
    Registered
    Join Date
    Apr 2004
    Location
    sydney, australia
    Posts
    169
    Downloads
    0
    Uploads
    0

    Default

    They both look good printing with page scaling off.
    I lined the 3 axis layout up with the print direct from eagle and it was spot on.
    The horzontal rulers are spot on but the vertial is a bit off - 1/32 on the 3 axis board but I think this is just my printer as the print is exactly the same size as the one from eagle. Most printers aren't to acurate in this direction anyway as the paper can slip slightly and rollers change diameter with tempreture age and humidity etc.
    If i zoom right in I can't see any jaggies so I assume you exported postscript from eagle and the converted it into a pdf? Done this way the scale should be spot on.



  4. #84
    Registered pminmo's Avatar
    Join Date
    Jun 2003
    Location
    St. Peters, Mo USA
    Posts
    3312
    Downloads
    0
    Uploads
    0

    Default

    Yea I bought an inexpensive product - deskpdf couple of months ago, really like it. It uses gostscript and looks like a selectable printer. Much easier than doing the process manually. You can print a pdf document straight from eagle.

    Phil



  5. #85
    Registered slp_prlzys's Avatar
    Join Date
    Mar 2004
    Location
    Canada
    Posts
    222
    Downloads
    0
    Uploads
    0

    Default

    for the chopper converter current setting resistors,
    the total resistance should be equal to .82ohms if I
    wanted to have 1.5A right?
    Is there such a calculator likethis that do more than 2 resistors?

    thanks

    mhel
    "This is intentionally left blank."


  6. #86
    Registered pminmo's Avatar
    Join Date
    Jun 2003
    Location
    St. Peters, Mo USA
    Posts
    3312
    Downloads
    0
    Uploads
    0

    Default

    Use a spreadsheet - 1/Rtotal = 1/R1+1/R2+1/R3+1/R4 and so on. For example 2, 5, 10, and 20 ohms in parallel = 1/2 +1/5 +1/10 +1/20 so .5+.2+.1+.05 = 1/.85 = 1.176 ohms. Remember the total parallel resistance will always be less than the smallest resistor value.

    Phil



  7. #87
    Registered slp_prlzys's Avatar
    Join Date
    Mar 2004
    Location
    Canada
    Posts
    222
    Downloads
    0
    Uploads
    0

    Default

    thanks, I knew I should have taken an electronic
    course rather than desktop publishing (maybe, because it's free)

    mhel
    "This is intentionally left blank."


  8. #88
    Registered slp_prlzys's Avatar
    Join Date
    Mar 2004
    Location
    Canada
    Posts
    222
    Downloads
    0
    Uploads
    0

    Default

    oh, I forgot.
    the calculator I posted does the computation in reverse tho.

    mhel
    "This is intentionally left blank."


  9. #89
    Registered
    Join Date
    Apr 2004
    Location
    sydney, australia
    Posts
    169
    Downloads
    0
    Uploads
    0

    Default

    I'll draw up a proper table of currents and combinations of resistors to use later. The resistors don't dissipate much power as there is current flowing in them for a short time in each chopper cycle. So you can use just four if it makes it easier to get the value you need. The resistor value is approx 1.1/Total Current (both phases)
    Slp if you want 1.5 A per phase- 1.1/3 = 0.37 0.37*5=1.85 so use 5 1.8 Ohm resistors (1 watt).



  10. #90
    Registered pminmo's Avatar
    Join Date
    Jun 2003
    Location
    St. Peters, Mo USA
    Posts
    3312
    Downloads
    0
    Uploads
    0

    Default

    Updated the webpage and cleaned it up a bit. Added a printable sheet for Digikey and Newark part numbers. Tach, do you have a pic of your populated 3 axis board and chopper adapter?

    Phil



  11. #91
    Registered slp_prlzys's Avatar
    Join Date
    Mar 2004
    Location
    Canada
    Posts
    222
    Downloads
    0
    Uploads
    0

    Default

    thanks tachus42,
    just getting ready to purchase components
    'want to make sure I get all the parts,
    I hate it when I want to build something and
    I can't find a particular component, I got no ride
    so I have to get complete parts at one time, if
    my brother is in the mood to give me a lift.

    pminmo: nice job on the pages I like what you did
    with the part list.

    mhel
    "This is intentionally left blank."


  12. #92
    Registered
    Join Date
    Apr 2004
    Location
    sydney, australia
    Posts
    169
    Downloads
    0
    Uploads
    0

    Default

    New zip file text file with current limit resistor values, also a small change to the board - added a spot for a optional supply cap to use if power suplly connections are long.

    Attached Files Attached Files


  13. #93
    Registered pminmo's Avatar
    Join Date
    Jun 2003
    Location
    St. Peters, Mo USA
    Posts
    3312
    Downloads
    0
    Uploads
    0

    Default

    Tach,
    I's like to look at the spice displays closer. Can you zip them so they are'nt resized?

    Thanks,
    Phil



  14. #94
    Member mvaughn's Avatar
    Join Date
    Jan 2004
    Location
    United States
    Posts
    379
    Downloads
    0
    Uploads
    0

    Default

    I hate to ask you guys, you've already done so much for everyone here.

    Is there any hope of a 4-axis controller?



  15. #95
    Registered pminmo's Avatar
    Join Date
    Jun 2003
    Location
    St. Peters, Mo USA
    Posts
    3312
    Downloads
    0
    Uploads
    0

    Default

    You can use 4 of the single axis boards. The one thing about a modular approach is the ease of switching driver boards to trouble shoot a problem.

    Tach, do you think you could fit a 4th axis on a single board? I guess the other possibility would be to put some hocks in the 3 axis board to piggyback a fourth axis.

    Phil

    Last edited by pminmo; 08-12-2004 at 05:04 PM.


  16. #96
    Member mvaughn's Avatar
    Join Date
    Jan 2004
    Location
    United States
    Posts
    379
    Downloads
    0
    Uploads
    0

    Default

    I like the modular approach as well. How hard is to to build a 4-axis break out board?

    The reason I ask is because I eventually would like to build a foam cutter.



  17. #97
    Registered pminmo's Avatar
    Join Date
    Jun 2003
    Location
    St. Peters, Mo USA
    Posts
    3312
    Downloads
    0
    Uploads
    0

    Default

    4 Axis compatable with the modular boards attached.

    Phil

    Attached Files Attached Files


  18. #98
    Registered
    Join Date
    Apr 2004
    Location
    sydney, australia
    Posts
    169
    Downloads
    0
    Uploads
    0

    Default

    4 Axises on a single board might be posible but it's probably better just to use a 3 axis plus a single or a partaily filled 3 axis board if you dont mind wasting a bit of pcb would fit right onto the "stack".
    I'm toying with the idea of a simple boost converter to get more volts out of a pc power supply. There is a prelimliary design attached but I'm not sure how well it will work at high power levels. The peak currents on the 5 volt rail especially are huge. Still if it works it could be cheaper than building or buying a 200w power supply.
    Comments?

    Attached Files Attached Files


  19. #99
    Registered pminmo's Avatar
    Join Date
    Jun 2003
    Location
    St. Peters, Mo USA
    Posts
    3312
    Downloads
    0
    Uploads
    0

    Default

    Interesting thought as old PC supplies are a dime a dozen.

    Phil



  20. #100
    Registered
    Join Date
    Apr 2004
    Location
    sydney, australia
    Posts
    169
    Downloads
    0
    Uploads
    0

    Default

    After some thought it won't work as drawn(discontinous mode), the ripple current would kill the pc power supply but if it's operated in continous mode it can be made to work. I'll need to do some simulation.



Page 5 of 39 FirstFirst ... 234567815 ... 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

Open Source Boards Available, Stepper Drivers and Break Out Boards

Open Source Boards Available, Stepper Drivers and Break Out Boards