New build with recycled parts on a ridiculous budget 120cm*60cm work area

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Originally Posted by Clive S

In my opinion nema 23's for a router need to be 3.1nm 8 wire, wired in parallel config running at about 4A with AM882 drives at 68V this is a tried and tested solution for many.

In your case I think you are going to slave an axis so you have to think about homing IF using two motors on one axis, so if looking at motion controllers make sure that, that is possible (not all do) Linuxcnc now finally can do this even with a simple bob (as long as you use master 2.8 branch) as it will now home to two axis and be able to offset one to sort out any squaring of the gantry. (this is not an advert for Lcnc as there are plenty of controllers that can do this)
Mach3 can do this as well.

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Would this power supply do?
http://www.ebay.co.uk/itm/800W-High-...AAAOSwPhdVJL-~

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Originally Posted by Desertboy

Would this power supply do?
http://www.ebay.co.uk/itm/800W-High-...AAAOSwPhdVJL-~

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No. But you could make one for that price:

https://www.rapidonline.com/50a-brid...al-case-519318

https://www.rapidonline.com/samwha-h...acitor-11-3121

https://www.rapidonline.com/lcr-ep08...-clamp-11-3004

https://www.rapidonline.com/vigortro...-x-25v-88-0012

Some people might use 24-0 -24V secondary

Fixing become much more expensive when you order the wrong ones lol, I was convinced they were M10's that bolt the extrusion together they're actually M12 so £20 wasted on 30 M10 bolts and an M10 tap :( Ordered correct bolts going to try and wing it without a tap first.

Maybe I should build my own power supply has a certain geek factor to it ;)

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Originally Posted by Desertboy

Fixing become much more expensive when you order the wrong ones lol, I was convinced they were M10's that bolt the extrusion together they're actually M12 so £20 wasted on 30 M10 bolts and an M10 tap :( Ordered correct bolts going to try and wing it without a tap first.

Maybe I should build my own power supply has a certain geek factor to it ;)

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I don't think you can screw a bolt into the extrusion without a tap I use these:- https://www.cutwel.co.uk/threading/m...1-tb804-series

In a battery drill.

Building a power supply is simple about one hours work.

I doubt you will get an m12 bolt in without a tap.

3 piece set here for 8 quid... http://www.ebay.co.uk/itm/HSS-METRIC...NnuGfIi7lhU9Dg

Hi this is where the bolts are going into
Attachment 22459

You can get away without a tap if you use a decent impact driver but I've heeded your advice and bought one anyway lol might as well do it right. ;)

They sell bolts for self tapping into these I assume they have a more aggressive thread but I have used stainless A2's before untapped but that was with the 20mm extrusion which was very hard to do.

The 20mm is a solid circle though in the middle I think this would be easier to drive them in but might as well tap them. Annoying because I wanted to assemble the frame this weekend and bolt the rest of the Hiwin's on.

Yeah I've used the self tapping thread screws before, albeit m6 rather than m12. As you say they have a cutting type thread rather than the typical. Work well though, especially when you have a lot to do it's a big time saver over tapping.

your extrusion holes are a slightly different design to mine and looks easier to tap with those "tabs", I just know that even tapping mine to m12 was quite an effort. I just imagine you might risk shearing a bolt off trying to drive a thread that big with a normal bolt using an impact driver.... which might probably ruin your day, although m12 is quite meaty so that would take a lot of force I guess.

If you were closer you could have just borrowed my taps, but I guess just posting them to you won't work out much cheaper or quicker. No one near you that you could borrow from?

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Originally Posted by Zeeflyboy

Yeah I've used the self tapping thread screws before, albeit m6 rather than m12. As you say they have a cutting type thread rather than the typical. Work well though, especially when you have a lot to do it's a big time saver over tapping.

your extrusion holes are a slightly different design to mine and looks easier to tap with those "tabs", I just know that even tapping mine to m12 was quite an effort. I just imagine you might risk shearing a bolt off trying to drive a thread that big with a normal bolt using an impact driver.... which might probably ruin your day, although m12 is quite meaty so that would take a lot of force I guess.

If you were closer you could have just borrowed my taps, but I guess just posting them to you won't work out much cheaper or quicker. No one near you that you could borrow from?

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I just bought one £8 was worth it

I have just tapped 26 M12 in heavy extrusion, it take less than 20 secs a hole with the right tap.

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Originally Posted by Clive S

I have just tapped 26 M12 in heavy extrusion, it take less than 20 secs a hole with the right tap.

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Oddly enough I have 26 to tap.