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  1. I emailed the probe vendor as the tip is not concentric. He responded with some info on how it can be calibrated. I then searched and found this - http://www.machsupport.com/forum/ind...c,17766.0.html - Whilst this doesnt fix the actual issue, it looks like I can use the same prob or perhaps two of them for different uses (I bought two as I was importing it from the US anyways). Perhaps next time I should pay attention to the other stuff in the box.

  2. #432
    m_c's Avatar
    Lives in East Lothian, United Kingdom. Last Activity: 7 Hours Ago Has been a member for 9-10 years. Has a total post count of 1,724. Received thanks 180 times, giving thanks to others 5 times.
    What probe did you buy?

    One thing you'll need to check, is what voltage/current the probe is designed to work with. I made up a small interface board for my probe, so it was only switching the designed 5V, so I could use it to switch a 24V opto. Details can be found in this post over on the mach forum - http://www.machsupport.com/forum/ind...html#msg195436
    Avoiding the rubbish customer service from AluminiumWarehouse since July '13.

  3. Quote Originally Posted by m_c View Post
    What probe did you buy?

    One thing you'll need to check, is what voltage/current the probe is designed to work with. I made up a small interface board for my probe, so it was only switching the designed 5V, so I could use it to switch a 24V opto. Details can be found in this post over on the mach forum - http://www.machsupport.com/forum/ind...html#msg195436
    Two of these, almost a year ago, lol.

    https://www.machsupport.com/forum/in...ic,5004.0.html

  4. So Ive bit the bullet and bought a 'proper' probe. Its mechanical, not electrical and I want to make an arm for it like the Datron has that comes down, probes and I can then move it back in the 'up' position when not needed. Thinking to use some form of offsets to make this work.

    How do I manage with an arm to rotate 180 degrees? Arduino Uno and servo? Id need a fairly strong servo me thinks ....

    Thoughts?

    Click image for larger version. 

Name:	ProbeArm.PNG 
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ID:	22695

  5. #435
    Quote Originally Posted by Chaz View Post
    So Ive bit the bullet and bought a 'proper' probe. Its mechanical, not electrical and I want to make an arm for it like the Datron has that comes down, probes and I can then move it back in the 'up' position when not needed. Thinking to use some form of offsets to make this work.

    How do I manage with an arm to rotate 180 degrees? Arduino Uno and servo? Id need a fairly strong servo me thinks ....

    Thoughts?

    Click image for larger version. 

Name:	ProbeArm.PNG 
Views:	39 
Size:	68.2 KB 
ID:	22695
    Do you think it is possible to rotate about a hole/pin and get the repeatability ? How about sliding the arm up and down with a piece of spring steel to hold it against a ground edge? Could have a slot in the middle with a fixed dowel pin to give top and bottom end stops. Then add detents for top and bottom position. Manually move it up and down as required or drive it via a motor with a cam?
    Building a CNC machine to make a better one since 2010 . . .
    MK1 (1st photo), MK2, MK3, MK4

  6. Quote Originally Posted by routercnc View Post
    Do you think it is possible to rotate about a hole/pin and get the repeatability ? How about sliding the arm up and down with a piece of spring steel to hold it against a ground edge? Could have a slot in the middle with a fixed dowel pin to give top and bottom end stops. Then add detents for top and bottom position. Manually move it up and down as required or drive it via a motor with a cam?
    Well, I'm bad with this type of thinking. Datron have this on their machines (it pivots 180 down), so there must be a way but im not against it going up / down instead, anything I can look at on Youtube for inspiration?

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