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I have MK3/4 controller and TNG software.

I would like to connect four SPST-NO momentary switches to four inputs on the MK3/4 board (IN1, IN2, IN3, IN4). Each switch would have its own function.
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Can anyone tell from the picture who is the manufacturer of this HSK 85S, 8300 RPM spindle?

425568

Ah, sorry! This is the board that I can get locally:...

Thank you both for your responses!

I send the board out for repair to PlanetCNC.

Your scheme makes perfect sense to me John, thank you!

There is just one thing that is still bothering me. If...

Thank you John for your quick response.

I will contact the support to see whether they can fix the board.

Can I use this PC817 module to wire the inductive switches:...

I am a beginner and I know what I did is gonna sound terrible.

I have a Mk3/4 Planet CNC controller and I connected NC PNP inductive proximity switches to LIM1, LIM2 and LIM3 inputs.

The...

I am making a list of manufacturers of desktop hobby grade and semi-professional CNC routers.

Eventully my goal is to create a websiite with some sort of comparison tool and list there all the...

Is anyone using a budget notebook to run UCCNC software? I'm thinking about buying Acer Aspire A114-31-C7VN for my EMCO F1 conversion.

The minimum CPU frequency for UCCNC is 1.80 GHz.

The...

How long is the original cable that comes with the controlller? Is the original cable 2.0 or 3.0?

Does it matter whether I use USB 3.0 or USB 2.0 cable for UC100?

Is this cable ok?
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Awesome! Any time frame?

It might be uncommon but it is very useful. I have more than a dozen in use at the moment and soon to be more.

I am unable to find how do you define the 9 offsets in the TNG software.

Can you...

Mach3 has 253 work coordinate systems. Are there only 9 work coordinate systems in PlanetCNC software?

The one from Grainger is 7201-BEGCP (heavy preload) and the one from bearingboys.co.uk is 7201-BEGBP (medium preload). You posted a link to 7201 BEGAP (light preload) one.

Exploring the wonders of angular contact ball bearings for the past few days.

I noticed that not all bearings that SKF produces are listed in their online catalog.

Here is an example:
...

That makes sense but there is no axial load listed for single row angular contact ball bearings either. I would like to know static, dynamic and fatigue axial loads.

Trying to find or calculate axial load ratings of the particular double row angular contact ball bearing (static, dynamic, fatigue). There are only radial load ratings listed.

The bearing:...

Does anyone know what is the difference between the following Yaskawa motors?

SGMAH and SGMAS
SGMPH and SGMPS

George: How do you cut long unsupported round rails to the exact length?

https://www.youtube.com/watch?v=EjjGE6neTqQ

That looks promising but I wonder how it works and how sustainable it is in dry environment

The second and third statements make sense.

But why would be larger diameter easier to produce accurately?

Of course I am referring to rolled ball screws.

Anyone knows why in general 1605 ballscrews are cheaper than 1204?

Or maybe not. Found some very interesting information: http://www.smslinear.com/gifs/pdfs/Rotary%20Bearings.pdf

How harmful actually is MDF dust for example? Can it penetrate into the round linear bearing despite wipers?

Wouldn't it be a lot cheaper to use two single row angular contact bearings in DF configuration? C2 or C1 double row angular contact bearings are pretty expensive.

I wonder why people almost allways protect ball screws on their CNC routers while they don't protect rails. Ball nuts have wipers just like linear bearings/blocks. Why is it more important to protect...

I am looking for single row angular contact bearings to provide support for a 1204 ball screw. Is it worth paying more for FAG bearings or are they just overkill? Keep in mind that I am talking about...

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I see that you don't use ball screw support units. Do you use angular contact bearings, and if so, how do you preload them?