Aluminium Extrusion Router Build

**Clive S** · 22-05-2018

What size toroidal, what motors and what drives are you using? Too many varables

**NFryer** · 22-05-2018

Originally Posted by Clive S

What size toroidal, what motors and what drives are you using? Too many varables

Hi Clive,

The drives and motors I'm using are the Leadshine Hybrid Stepper ones, HBS86 drive and 60HBM30-1000 NEMA24 motor. The drive has a maximum voltage rating of 80VDC. The toroidal transformer which I haven't got yet will probably be a 45VAC+45VAC 1000VA one from Airlink transformers. I did the following calculations to arrive at this, and if you see any obvious errors can you tell me.

The motors are 2 phase with a current of 5A per phase so 10A per motor. The motors have 4 power leads which means that they will probably be series wound so I think that the motors will pull approximately a third of the maximum, so about 3.3A per motor. I'm using 4 motors so the total current draw should be about 13A.

For the voltage I took the mains voltage +10% as a worst case so

45VAC + 10% = 49.5VAC
49.5VAC + 4% for transformer regulation = 51.5VAC
51.5 multiplied by 1.414 = 72VDC
72VDC - 2.2V for the bridge rectifier drop gives roughly 70VDC output.

Hopefully this is alright and I haven't made any obvious errors.

**Clive S** · 22-05-2018

OK You might have been better with 8 wire motors wired in parallel as you would get more speed out of them I take it these are for a router. Although having said that I have no experience with the motors and drive you have.

I have 4 motors on my router running from a 500Va tx at about 70V with no problems. I doubt they would pull more than 8-9 A

Good luck with the build.

**wiremonkey** · 23-05-2018

Woohoo! That is one stout build and very clean work, particularly for not having a mill. Seriously, great stuff. I missed the type of linear rails you're using and do you like them? Also, do you have a supplier. I'm in the USA.
Thanks

**NFryer** · 24-05-2018

Originally Posted by wiremonkey

Woohoo! That is one stout build and very clean work, particularly for not having a mill. Seriously, great stuff. I missed the type of linear rails you're using and do you like them? Also, do you have a supplier. I'm in the USA.
Thanks

Thanks for the compliment about the work I've done and it maybe a bit of overkill but better stout than all flimsy. The rails I'm using are Hiwin 20mm ones together with narrow carriages on the Z axis and the wide ones on both the Y and X axes. I got them custom sized from a supplier here in the UK. If you want them you could try Fred at BST Automation on AliExpress. He sells Hiwin stuff and is a great supplier as I got a set of custom ballscrews from him and had no problems at all with them.

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