DC stepper drivers in an AC system

[Benja]

Hi Clive yes that was the power supply i had in mind . so it doesnt matter that all the other contol gear is AC no? I never even realised there was such a thing as AC stepper drives or an ac bob!

I realise it sounbds a bit crazy as of course a dc psu is powered by ac. but since everything is stright up AC I thought i would check with folk who know about these things.


That one at zapp is out of stock. I would have no idea how to build one. this might do it i guess? https://cnc-plus.de/en/CNC-Electroni...e-output-.html If I hooked it up to the original transformer. not quite the seperation I was looking for

[Clive S]

Hi Clive yes that was the power supply i had in mind . so it doesnt matter that all the other contol gear is AC no? I never even realised there was such a thing as AC stepper drives or an ac bob!

I realise it sounbds a bit crazy as of course a dc psu is powered by ac. but since everything is stright up AC I thought i would check with folk who know about these things.

These will work off AC https://www.ebay.co.uk/itm/2DM860H-2...MAAOSwb85alhS1

[Benja]

These will work off AC https://www.ebay.co.uk/itm/2DM860H-2...MAAOSwb85alhS1

Thanks that looks great but I was hoping to get something sorted in the next couple of days.

I just hooked up an EM 503 to the X using another psu i have spare, just to prove concept as it were.
Fuck me its a diffent machine!
Only did one axis. They are drivers I'm intending to use on the Novamill upgrade. I had to tune down a bit but shocked at the difference.

The 806's will be brilliant i think, im almost tempted to put 3 ph hybrids on but i think thats for another day. i'll see how well this goes first for the money its looking like a very good upgrade.

[Clive S]

I would have no idea how to build one

There are only 3 components in the unregulated power supply and have look at this excellent vid from Joe on this forum. Using a 500 or 650 Va toroidal transformer, 3 caps and a rectifier.

This would be better than a regulated PS.


https://www.youtube.com/watch?v=4OoQ...zD30sZjtp_VyqY

[Benja]

Hey that doesnt look too bad, I'll have to figure a shopping list for RS then.
Going to Zapp this morning to pick up the 806's :)

[Clive S]

Hey that doesnt look too bad, I'll have to figure a shopping list for RS then.
Going to Zapp this morning to pick up the 806's :)

Here you go.:-
1 off https://www.rapidonline.com/vigortro...-x-25v-88-0012

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

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

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

[Benja]

Here you go.:-
1 off https://www.rapidonline.com/vigortro...-x-25v-88-0012

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

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

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

Bloody hell man, thank you very much. :) I think ive got a bit of AL that should do the job nicely too

[Benja]

806's now installed , using a leadshine switching psu at the min and will swap out for the linear once its built :) although the switching will work fine im sure sounds like the linear will be more efficient and possibly more stable in the long run. also fun to build! :) thanks Clive for your help.

Those drivers are night and day from the analogues I was using, motion is smoother and quiter even though ive gone from 1/10 to 1/5 Ms. Very happy but with a faint feeling I should have gone for the easy servo even though logic says this setup should be just as accurate.

Key thing for me I think is I know these are now running at full power. The proof will be in production.