506,647 active members
2,543 visitors online
Register for free
Login
IndustryArena Forum > CNC Electronics > General CNC Machine Related Electronics > How to assign 5th & 6th Axis to Slave when Pin 2-9 already used in 4 Axis for Mach3
Results 1 to 9 of 9
  1. #1
    Registered
    Join Date
    Jul 2008
    Posts
    128

    How to assign 5th & 6th Axis to Slave when Pin 2-9 already used in 4 Axis for Mach3

    Im planning to attach 5th & 6th Stepper Motors for assigning B & C Axis to slave but Pin 2-9 in printer port is already used for my 4 axis stepper motors. What other Pin number in printer port should I assign my 5th & 6th stepper motors to Slave B & C Axis using Mach3? I dont use BOB as all my setup is connected directly to printer port pins.

  2. #2
    Registered
    Join Date
    Jul 2005
    Posts
    101
    a second printer port...

  3. #3
    Registered
    Join Date
    Jan 2006
    Posts
    713
    guy2b1,

    jpgdesigns is right, add a second printer port to the machine. That will give you the additional axis' to work with.

    steve

  4. #4
    Registered
    Join Date
    Jul 2008
    Posts
    128
    How about the pin assignments if I add the second printer port, is it the same as the original first printer port or in any pin assignments from 1 to 25 I can connect my stepper motors for my 5th & 6th axis, homing limit switches, estop, spindle, etc.? Are there any limitations if I add more say homing, limit switches, relay to automatically turn on/off my spindle? Im not using a BOB as all my setup is connecting directly to pins of printer port

  5. #5
    Registered
    Join Date
    Jul 2008
    Posts
    128
    bump

  6. #6
    Registered
    Join Date
    Jan 2006
    Posts
    713
    See the mach3 manual sections 4 and 5. The second will be the same as the first as far as pin assignment is concerned. Each port will have 12 output pins and 5 input pins, unless you configure Mach3 so that the second port will use pins 2-9 as inputs. The determination of which pin does what is up to you in the configuration of Mach3.

    I'm not using a BOB either. I am just very careful with my connections and keep the wires short between the computer and controller cards.

    As for the spindle relay, you will need either a Solid State Relay (SSR) that will work with the parallel port directly, or some type of circuit to drive the coil of a magnetic relay. I use SSR's for spindle and dust collector.

    Here is a link to the installation and configuration of Mach3
    http://www.machsupport.com/docs/Mach...all_Config.pdf

    You have very good English. Is English a second language for you?

    Steve

  7. #7
    Registered
    Join Date
    Jul 2008
    Posts
    128
    Thank you Steve, yes english is my second language. If im going to use a PCI card printer port as my second printer port, then the pin assignments are the same as the original printer port attached in motherboard, is pin 18 to 25 will also be assigned as ground even if its a PCI printer port card?

  8. #8
    Registered
    Join Date
    Jan 2006
    Posts
    713
    Yes they should be the same as the first port. If you were connecting it to a printer, the printer would expect these to be ground. I think the original idea for all the grounds was to provide extra shielding for printer cables, especially if it was a ribbon cable.

    Steve

  9. #9
    Registered
    Join Date
    Jul 2008
    Posts
    128
    Noted, thank you very much Steve

Similar Threads

  1. Slave an axis?
    By ger21 in forum LinuxCNC (formerly EMC2)
    Replies: 1
    Last Post: 09-03-2009, 04:44 AM
  2. Slave axis problem
    By Curtis Erpeldin in forum DIY CNC Router Table Machines
    Replies: 5
    Last Post: 07-30-2008, 08:57 AM
  3. Slave axis
    By CARLES in forum Mach Software (ArtSoft software)
    Replies: 2
    Last Post: 01-11-2007, 07:17 PM
  4. Need to slave slave A axis to B axis..
    By foam27 in forum Mach Mill
    Replies: 2
    Last Post: 07-04-2006, 03:58 AM
  5. Slave axis
    By walter in forum Mach Software (ArtSoft software)
    Replies: 4
    Last Post: 01-09-2006, 01:47 AM

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
  •