. .
Page 4 of 4 FirstFirst ... 234
  1. #31
    So, anybody got a good source for proximity sensors?
    As i have understood, im in the market for the inductive kind. 4 mm sensing distance would do it and NPN/PNP should not matter with the Csmio IP-M. Emergency switch, some resistors and a main switch is also on the shopping list right now...
    Last edited by JW1977; 05-09-2019 at 08:08 AM.

  2. #32
    it depends on the budget your working to

    if its a hobby machine then try amazon or ebay etc
    buy 1 to check the quality then order the others you need

    for a business machine you use to make a living
    look at industrial suppliers like RS Components , Farnell or Rapidonline
    for original proximity sensors not the cheep clones found else ware online

    you will pay more but they will be to the published specification


    after looking at your location


    Last edited by john swift; 05-09-2019 at 04:57 PM. Reason: add example link to https://se.farnell.com/

  3. The Following User Says Thank You to john swift For This Useful Post:

  4. #33
    Don't waste money buying the expensive switches Just buy the cheap Chinese switches off ebay.

    I've fitted 100's and probably had about 3 in total that was faulty out of the bag. I've had about 5 fail in use over a 10yr+ period all on different machines.
    The accuracy is more than good enough for any Router or DIY Milling machine.

    The IP/M doesn't care which you use but I always fit NPN switches.

  5. The Following User Says Thank You to JAZZCNC For This Useful Post:

  6. #34
    Quote Originally Posted by JW1977 View Post
    So, anybody got a good source for proximity sensors?
    As i have understood, im in the market for the inductive kind. 4 mm sensing distance would do it and NPN/PNP should not matter with the Csmio IP-M. Emergency switch, some resistors and a main switch is also on the shopping list right now...
    Why the resistors.? You don't need any for the IP/M

  7. #35
    Maybe you got confused with all the chatter of 10k internal resistors, pull-up resistors and so on. You paid good money for a quality controller and therefore the prox sensors just plug straight in !

    I think I used resistors on the 12V front panel LEDs to run off 24V but that depends on how, or if , you want indicator lights for status and so on. For example they can also be mains powered indicator lights.
    Building a CNC machine to make a better one since 2010 . . .
    MK1 (1st photo), MK2, MK3, MK4

  8. #36
    Sorry guys, fuses, not resistors! Theres a lot on my mind right now...
    However, havent got to it yet, collecting the final parts right now but, i read about one resistor in the driver manual.

    VCC is compatible with 5V or 24V;
    R(3~5K) must be connected to control signal terminal.

    If im not mistaken i think i read about it in in the Csmio manual also but they recommend a 2K resistor there!?
    Last edited by JW1977; 06-09-2019 at 07:33 AM.

  9. #37
    Neale's Avatar
    Lives in Plymouth, United Kingdom. Last Activity: 7 Hours Ago Has been a member for 6-7 years. Has a total post count of 1,311. Received thanks 252 times, giving thanks to others 5 times.
    Couple of odd comments:

    IP/M is very happy with direct connection of prox switches running on 24V. Works well.

    IP/M drives the usual stepper drivers directly without needing any resistors. Use differential connection if your drivers support this - better noise resistance.

    Unlike Jazz, I've not been too lucky with prox switches from eBay. I bought a box of ten. One was the wrong type (unbelievable! Two-wire, quite obviously not the same as the rest of the 3-wire switches), one was faulty straight from the box, and one failed very shortly after fitting. However, the rest have been working fine for a couple of years now, and the whole box probably cost less than one "professional" quality switch. That's the difference between home building and commercial - commercial machine could not stand that level of quality, but it suits my pocket!

  10. The Following User Says Thank You to Neale For This Useful Post:

  11. #38
    I too bought a box of 10 from China.

    The machine I have from MD had end-on axial sensing and I crushed a sensor whilst jogging (the machine, not me!), In my naivety I ordered a replacement from MD and it cost £17.50 (ouch, ouch,ouch). When I crushed that one, I ordered 10 from China and converted the sensing to bypass.Some have orange sensor ends and a grey cable and some have blue ends and a black cable. I have 9 of them left. They are all NO and 4mm.


    No man is an island entire of itself; every man
    is a piece of the continent, a part of the main;
    if a clod be washed away by the sea, Europe
    is the less.

    Devotions upon Emergent Occasions
    John Donne 1624

  12. #39
    I also have had about 30 from AliExpress with no duds with pnp and npn types.
    The more you know, The better you know, How little you know

  13. #40
    My chicom mechanical switches are quite reliable, omron copies.

    They are not too accurate, and the mechanical assys are terrible, in terms of machinist parts.
    0.01-02 mm +/- in repeatability/accuracy is terrible.
    For my cnc lathe, industrial quality.

    But for routers, they are much more than good enough.

    (My lathe is for sub-micron or 1 micron repeatability.)

    Cheap 5$ optical limit switches provide about 2 microns accuracy, fairly easily.

Page 4 of 4 FirstFirst ... 234

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. G540, homing switches and mach3
    By marbles in forum Artsoft Mach
    Replies: 11
    Last Post: 02-06-2018, 02:55 PM
  2. Problem with homing
    By Andyman in forum Gantry/Router Machines & Building
    Replies: 4
    Last Post: 22-03-2016, 07:56 PM
  3. Homing switches & 'methods of working' (Mach3)
    By HankMcSpank in forum Artsoft Mach
    Replies: 15
    Last Post: 19-10-2012, 12:54 AM
  4. Homing Switches
    By m_c in forum General Electronics
    Replies: 3
    Last Post: 04-11-2010, 11:21 PM
  5. A simple query about homing switches & milling practise
    By HankMcSpank in forum General Discussion
    Replies: 5
    Last Post: 13-06-2009, 11:56 PM


Posting Permissions

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