545,760 active members*
2,238 visitors online*
Register for free
Login
Page 4 of 6 23456
Results 61 to 80 of 102
  1. #61
    Registered
    Join Date
    Oct 2009
    Posts
    712

    Re: David A's Benchtop CNC Version 2

    Final step for completion of the basic machine hardware assembly:
    .
    .
    .
    INSTALLATION OF LINEAR DRIVES:
    .
    .
    The machine uses rotating ball nuts:

    Attachment 465270

    Some specs for the drives:

    • Size: 12mm ball screw
    • Lead: 0.1575" per ball nut revolution
    • Suggested max RPM: 3,000
    • Max speed @ 3,000 RPM: 470 IPM
    • Rotational mass: 4.4 ounces (without bearings)
    • Rotational mass diameter: 1.1"
    • Belt reduction ratio: From 1:2 to 2:1
    • Reduction on the machine: 1:1 on X and Y axis. 1:1.25 on Z axis.
    • Motor size: NEMA 23
    .
    .
    .
    .

  2. #62
    Member
    Join Date
    Jul 2018
    Posts
    3027

    Re: David A's Benchtop CNC Version 2

    Hi David - You got me excited there I thought you had "real" linear drives but then I looked them up and they are called linear motors...

    https://www.hiwin.us/products/linear-motors/

    Keep at it, Peter

  3. #63
    Registered
    Join Date
    Oct 2009
    Posts
    712

    Re: David A's Benchtop CNC Version 2

    Hey Peter,

    I don't know what you want to call them. I guess every power source driven actuation is a "drive" and every single axis actuation is a "linear drive"?

    I would probably call a linear drive with all necessary gears, belts and supporting parts "drive line".

  4. #64
    Registered
    Join Date
    Oct 2009
    Posts
    712

    Re: David A's Benchtop CNC Version 2

    .
    .
    INSTALLATION OF Z-AXIS DRIVE:

    Remove the bridge on the Z-slide shafts:

    Attachment 465300

    The drive will be installed on those four standoffs:

    Attachment 465302

    Linear drive in place:

    Attachment 465304

  5. #65
    Registered
    Join Date
    Oct 2009
    Posts
    712

    Re: David A's Benchtop CNC Version 2

    With the motor installed:

    Attachment 465312

    Place the bridge over the ball screw and the shafts:

    Click image for larger version. 

Name:	Linear Drive 6 color arrow.jpg 
Views:	0 
Size:	319.8 KB 
ID:	465314

    Z-axis linear drive installed:

    Click image for larger version. 

Name:	Linear Drive 7 color.jpg 
Views:	0 
Size:	351.9 KB 
ID:	465316

  6. #66
    Member
    Join Date
    Jan 2005
    Posts
    12531

    Re: David A's Benchtop CNC Version 2

    Quote Originally Posted by davida1234 View Post
    Hey Peter,

    I don't know what you want to call them. I guess every power source driven actuation is a "drive" and every single axis actuation is a "linear drive"?

    I would probably call a linear drive with all necessary gears, belts and supporting parts "drive line".
    What you have is a Ballscrew with a rotating nut, it still a Ballscrew with a driven Ballnut, it is not a linear drive
    Mactec54

  7. #67
    Registered
    Join Date
    Oct 2009
    Posts
    712

    Re: David A's Benchtop CNC Version 2

    Thank you for the clarification, mactec.

    I would correct the header to "ball screw installation" above but the "edit" button is no longer there.

  8. #68
    Member
    Join Date
    Jan 2005
    Posts
    12531

    Re: David A's Benchtop CNC Version 2

    Quote Originally Posted by davida1234 View Post
    Thank you for the clarification, mactec.

    I would correct the header to "ball screw installation" above but the "edit" button is no longer there.
    It does not really matter how it is called as it is still linear motion using a Ballscrew
    Mactec54

  9. #69
    Registered
    Join Date
    Oct 2009
    Posts
    712

    Re: David A's Benchtop CNC Version 2

    .
    .
    .
    INSTALLATION OF Y-AXIS BALL SCREW DRIVE:
    .
    .
    Turn the ball screw all the way down so that the one end sticks out just about an 1/8" at the ball nut cage:

    Attachment 465376

    Thread the other end of the ball screw through the eye of the big front brace:

    Attachment 465378

    All the way through at the other end, place the motor mount/ball nut cage between the gantry braces:

    Attachment 465380

    Motor mount/ball nut cage in place:

    Click image for larger version. 

Name:	Linear Drive 11 color.jpg 
Views:	0 
Size:	348.1 KB 
ID:	465382

  10. #70
    Registered
    Join Date
    Oct 2009
    Posts
    712

    Re: David A's Benchtop CNC Version 2

    With the motor mount in place, turn the ball screw all the way in towards the back
    until it sticks out about an inch over the back cap and clears the eye at the front cap:

    Attachment 465384

    Attachment 465388

    Attachment 465390

    Install the grommet into the eye of the front brace.
    Make sure it is seated all the way around:

    Attachment 465392

    Back out the ball screw until it goes through the grommet and clears it by about 1/8":

    Attachment 465394

    Click image for larger version. 

Name:	Linear Drive 17 color.jpg 
Views:	0 
Size:	300.9 KB 
ID:	465396

  11. #71
    Registered
    Join Date
    Oct 2009
    Posts
    712

    Re: David A's Benchtop CNC Version 2

    For particularly dusty environments, you can place two brush stubs at the front
    and rear of the carriage. They help to clear dust on the non-rotating ball screw:

    Attachment 465398

    Place and screw down the dust covers front and rear on the carriage:

    Attachment 465400

    Screw down the motor mount/ball nut cage with four screws:

    Attachment 465402

    Make sure the rear of the ball screw is placed into the back cap seat:

    Attachment 465404

    Place the clamp onto the screw and tighten down:

    Click image for larger version. 

Name:	Linear Drive 23 color arrows.jpg 
Views:	0 
Size:	207.0 KB 
ID:	465406

  12. #72
    Registered
    Join Date
    Oct 2009
    Posts
    712

    Re: David A's Benchtop CNC Version 2

    Motor in place:

    Attachment 465426

    Wiring attached:

    Attachment 465428

    Installation of Y-axis ball screw/rotating ball nut is completed.
    Repeat on the A-axis:

    Click image for larger version. 

Name:	Linear Drive 26 color.jpg 
Views:	0 
Size:	235.8 KB 
ID:	465430

  13. #73
    Registered
    Join Date
    Oct 2009
    Posts
    712

    Re: David A's Benchtop CNC Version 2

    .
    .
    .
    INSTALLATION OF X-AXIS BALL SCREW:
    .
    .
    Install a hex cap screw on the motor plate as shown, leaving
    a clearance of about 1/4" between the hex cap and the plate:

    Attachment 465492

    Push the hex cap/motor plate through the hole and slide to the right:

    Attachment 465494

    Once motor plate/ball nut is placed, install the two bottom screws and start
    tightening while making sure that the ball screw is centered with the grommet eye:

    Attachment 465496

    Attachment 465498

    Two bottom screws tightened down:

    Attachment 465500

    Tighten the hex cap screw behind the cross brace:

    Attachment 465502

    Install and tighten the support brace onto the motor plate:

    Click image for larger version. 

Name:	Linear Drive 33 color.jpg 
Views:	0 
Size:	335.5 KB 
ID:	465504

  14. #74
    Registered
    Join Date
    Oct 2009
    Posts
    712

    Re: David A's Benchtop CNC Version 2

    As with the other grommet eyes, back out the ball screw to clear the grommet
    eye, install the grommet and turn in the ball screw through the grommet:

    Attachment 465506

    Attachment 465508

    Place the other end of the ball screw onto the clamp pillow:

    Attachment 465510

    Place the clamp on the ball screw and tighten down:

    Click image for larger version. 

Name:	Linear Drive 37 color.jpg 
Views:	0 
Size:	335.0 KB 
ID:	465512

  15. #75
    Registered
    Join Date
    Oct 2009
    Posts
    712

    Re: David A's Benchtop CNC Version 2

    .
    .
    .
    The installation of ball screws and the mechanical assembly of the machine is finished.
    This will be posted on the website as the base machine on which I am working right now.

    Next up will be all peripheral additions.

    Image of all ball screw arrangements (some drag chains omitted for clarity):

    Click image for larger version. 

Name:	Linear Drive 38 gradient_color.jpg 
Views:	0 
Size:	276.2 KB 
ID:	465522

  16. #76
    Registered
    Join Date
    Oct 2009
    Posts
    712

    Re: David A's Benchtop CNC Version 2

    Mechanically finished machine from the front:

    Click image for larger version. 

Name:	Machine_front.jpg 
Views:	0 
Size:	179.1 KB 
ID:	465554

    Click image for larger version. 

Name:	Machine_front gradient.jpg 
Views:	0 
Size:	200.6 KB 
ID:	465556

  17. #77
    Registered
    Join Date
    Oct 2009
    Posts
    712

    Re: David A's Benchtop CNC Version 2

    .
    .
    .
    The machine is mechanically finished and ready to accept all your electrics, electronics and peripherals.

    I also designed expansion sets like spindle cooling, cutting fluid or air, dust collection,
    vacuum holding, wiring, etc. which were specifically made for this machine.

    The following posts will show the installation of all the expansion sets.

    SPINDLE COOLING EXPANSION SET

    Spindle cooling set contains two 8-pipe radiators and fans,
    a 200 mL reservoir, a brushless mag-drive, 60 gph pump and hardware.

    This setup has been running for two years on my prototype machine without any problems.

    Parts for water cooled spindle set:

    Attachment 465622

    Set will be mounted on the top plate of the X-carriage:

    Attachment 465624

    Install one side with two screws as shown:

    Attachment 465626

    Looking from the inside:

    Click image for larger version. 

Name:	EXP Spindle Cooling 4 color.jpg 
Views:	0 
Size:	213.2 KB 
ID:	465628

  18. #78
    Registered
    Join Date
    Oct 2009
    Posts
    712

    Re: David A's Benchtop CNC Version 2

    Install the second radiator/fan the same way on the other side:

    Attachment 465636

    Install the reservoir bracket and the two standoffs:

    Attachment 465638

    Place the reservoir on the standoffs and secure with a zip tie to the bracket:

    Attachment 465640

    Slightly warm up the ends of the 1/4" hose to soften and connect the parts as shown.
    It is a bit tight but the hose will go over the nipples.
    On the prototype machine, it didn't need any clamps to stay on:

    Attachment 465642

    .
    .
    .
    THIS CONCLUDES THE INSTALLATION OF THE SPINDLE COOLANT SET.

  19. #79
    Registered
    Join Date
    Oct 2009
    Posts
    712

    Re: David A's Benchtop CNC Version 2

    .
    .
    .
    WIRING EXPANSION SET:
    .
    .
    Attachment 465964

    Wiring set includes one junction box, three PNP sensors and all necessary signal and power wiring for
    4 servos, the sensors and associated connection wires connecting the machine to your controller.

    The Molex connector ends work with Teknic servos or the ends can be modified to fit other motors.

    Included OMKQN sensors do not require magnets and have been working good on the prototype machine.
    I could not measure any differences between them and the higher end sensors.

    Attachment 465966

  20. #80
    Registered
    Join Date
    Oct 2009
    Posts
    712

    Re: David A's Benchtop CNC Version 2

    Junction box will be installed on the back brace using these holes:

    Attachment 466004

    J-box installed with the spacers.
    On top is a saddle for the reservoir to sit on:

    Attachment 466006

    X-axis limit sensor will be installed onto the slot of the back brace:

    Attachment 466008

Page 4 of 6 23456

Similar Threads

  1. David Rigotti - Hobby CNC Plans
    By KeithSloan in forum DIY CNC Router Table Machines
    Replies: 0
    Last Post: 02-12-2020, 10:12 PM
  2. David A's New 2x3 Bench Top CNC
    By davida1234 in forum DIY CNC Router Table Machines
    Replies: 847
    Last Post: 08-18-2019, 01:47 AM
  3. Replies: 1
    Last Post: 03-29-2017, 03:18 PM
  4. DIY David Steel CNC
    By Wineryrjd in forum DIY CNC Router Table Machines
    Replies: 2
    Last Post: 03-28-2010, 01:39 PM
  5. I built My CNC From David Steels Plans Now I need Feedrate help please
    By tager_rot in forum DIY CNC Router Table Machines
    Replies: 6
    Last Post: 09-09-2007, 07:52 PM

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
  •