. .

Threaded View

Previous Post Previous Post   Next Post Next Post
  1. 01-08-2018 #28
    john swift's Avatar
    Lives in merseyside, United Kingdom.
    john swift
    Last Activity: 18-01-2021 Has been a member for 9-10 years. Has a total post count of 257. Received thanks 53 times, giving thanks to others 0 times.
    I would try another BOB that does not have opto-isolated outputs
    and either has 74HC14 HEX inverters connecting the printer port outputs to the stepper driver inputs or 74ACT245 octal transceivers as used on the C10 BOB

    Click image for larger version.  Name: C10 I-O.jpg  Views: 1294  Size: 393.3 KB  ID: 24617
    the C10 has no opto-isolators on either the inputs or outputs


    note this BOB
    Click image for larger version.  Name: chinese BOB.jpg  Views: 1248  Size: 108.3 KB  ID: 24618
    has a design flaw

    if you look at the 74HC14 used for the inputs
    the supply pi 14 is not connected !!!

    see top left hand corner of the circuit diagram

    Click image for larger version.  Name: chinese breakout board.jpg  Views: 1224  Size: 161.3 KB  ID: 24619

    John
    Last edited by john swift; 01-08-2018 at 11:28 PM. Reason: add chinese BOB
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Need a bit of help with servo settings/setup
    By alboy in forum General Discussion
    Replies: 1
    Last Post: 07-06-2018, 11:04 AM
  2. PWM Settings
    By Gunar in forum General Electronics
    Replies: 20
    Last Post: 16-02-2017, 12:33 PM
  3. Mach 3 default settings,
    By chris w in forum Artsoft Mach (3 & 4)
    Replies: 4
    Last Post: 08-01-2016, 01:54 PM
  4. Home Switches & Slave Axis in Mach 3
    By Tenson in forum Artsoft Mach (3 & 4)
    Replies: 14
    Last Post: 03-03-2014, 11:43 PM
  5. Help with settings!
    By Tenson in forum General Discussion
    Replies: 26
    Last Post: 30-09-2012, 11:26 PM

Bookmarks

Posting Permissions

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

Forum Rules