SX2P electronics

[Gareth Jones 11Participant @garethjones11]

Morning all,

My SX2P was bought new from ARCeurotrade in May this year (I'm it's second owner) so I'm guessing it's a relatively new model/version. It has an aftermarket tacho kit which is powered by 9v battery that I'd like to eliminate.

Does anyone have a detailed elec' drawing for the mill? I was hoping to find somewhere to "borrow" a DC supply from, to replace the 9v battery. According to the info on the tacho and sensor, between 8 and 24vdc will do.

I also want to fit a reverse switch. This seems very simple – there is an unused 3 pin header on the potentiometer board which gives forward/reverse when either pin 1 or 3 is shorted to pin 2.

A bloke in the USA has a vid on YouTube demonstrating this in action but has anyone on here done it without ill effects?

Thanks

Gareth

[Gareth Jones 11Participant @garethjones11]

[JasonBModerator @jasonb]

I would have thought you could pick up a feed for the tacho from the socket that the mill has for the sieg display.

[Gareth Jones 11Participant @garethjones11]

I hoped so too but that socket only has 5v available for stealing.

Anyone used this:

https://www.ebay.co.uk/itm/265904298733?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=c1zlClA7S_K&sssrc=4429486&ssuid=UukGaBKmSby&var=565734937634&widget_ver=artemis&media=COPY

or simar to step the DC voltage up from 5 to 12v?

[Gareth Jones 11Participant @garethjones11]

Sorry for the awful link

[John HaineParticipant @johnhaine32865]

I have used these which are adjustable and they work well.

**LINK**

If you insert a link using the "globe&link" icon and paste the text into the URL box you can hide all the superfluous characters, which I did with this link.

Edited By John Haine on 07/09/2023 11:48:35

[Gareth Jones 11Participant @garethjones11]

Thanks John, both for the link and the "how to link".

I'll order one.

Cheers

[Dave HalfordParticipant @davehalford22513]

Posted by Gareth Jones 11 on 07/09/2023 10:45:05:

Morning all,

I also want to fit a reverse switch. This seems very simple – there is an unused 3 pin header on the potentiometer board which gives forward/reverse when either pin 1 or 3 is shorted to pin 2.

A bloke in the USA has a vid on YouTube demonstrating this in action but has anyone on here done it without ill effects?

Thanks

Gareth

Whats reverse used for?

[JasonBModerator @jasonb]

Reverse is handy for machine tapping, back spot facing or if you don't want to grind a special tool when using a boring head to do external work to name but a few

[Robert Atkinson 2Participant @robertatkinson2]

The adjustible regulator linked to is a bit over-specified for current. It draws more current off load than your tacho does.
Have you tried running the tachometer off 5V? It may work OK.

Robert.

[Gareth Jones 11Participant @garethjones11]

Reverse would mainly be for tapping.

Also, I have a nice little fly cutter that I made years ago and have never used as I cocked-up and made it to run the wrong way and accept a right hand tool, rather than left.

I sometimes use a Bridgeport at work and have found reverse useful many times.

[Bo’sunParticipant @bosun58570]

Posted by JasonB on 07/09/2023 12:04:32:

Reverse is handy for machine tapping, back spot facing or if you don't want to grind a special tool when using a boring head to do external work to name but a few

Hi Jason,

Sorry if this off topic, but when using a boring head (with a threaded arbor) in reverse, isn't there a risk it might unscrew?

[JasonBModerator @jasonb]

Yes if it's threaded and has not got a grub screw or some other way to lock it

[Harry WilkesParticipant @harrywilkes58467]

may not be what your wanting but I run my tacho off a old mobile phone charger

H

[Gareth Jones 11Participant @garethjones11]

Cheers Harry,

I've just spent a couple of hours stripping the guts from an old modem power supply. It's 12dc out so I found room in the main box, behind the collumn and fitted it in there, taking a 240v supply from the output of the mill's mains filter.

Rooted the 12v wires through the flexi conduit and into the tacho and job's a goodun'.

I've also wired in a button to the reverse and it works a treat. Just need the spiral flute taps that I've ordered to arrive and I can look for excuses to power-tap things.

Thanks to all who've answered.

Gareth

[Neil AParticipant @neila]

For my SX2P I made the digital speed display that Andrew Whale showed on his website. (Learning Turning Metal MT16) This connects to the socket on the machine. I have found it to be very good and have had no problems with it.

He has the link to the information in the text part of that video, well worth having a look at even if you decide not to go down that path.

Neil

[Gareth Jones 11Participant @garethjones11]

Thanks Neil. Great pointer. I glanced at the vid and it looks really interesting. He's got lots of other good stuff on his channel too. There's a section on fitting a DRO to the SX2P which is also on my list.

I'll have a better look ASAP.

Cheers

[JasonBModerator @jasonb]

Just be careful when tapping with the SX2P as unlike it's larger cousins the SX2.7,3 & 4 which have a specific tapping function with it's own settings on the board to control the amount of current drawn the SX2P does not have that protection so going too hard may see some smoke from where you don't want it. Keep speed reasonably low and about M6 max size.

[Gareth Jones 11Participant @garethjones11]

Thanks Jason. I won't push my luck.

[geoff walker 1Participant @geoffwalker1]

Hi Gareth,

I see you have added your reversing switch.

I added mine some years ago and have had no issues.

I had to reverse the rotation to suit a gear milling fixture I have.

Good luck with the tapping but as J said do take care

Geoff

[Gareth Jones 11Participant @garethjones11]

Thanks Geoff.

I've made my reverse a momentary push-button .

i.e. I have to keep my finger on it for it to run in reverse

I was worried about leaving it in reverse and forgetting then swiftly ruining a cutter, the next time I used the machine.

[Author]

Posts