MK1 Steel router build log 1500x800x200

[Clive S]

Theory : uh was it like ....
(25+25)*sqrt 2 / 230v*235v?? = 72,2 volts
(24+24)*sqrt 2 / 230v*235v?? = 69.4 volts
Goal : 68volts DC

Well, rectifier steals maybe 1 volt (Vf =1.1 volt) ?

Can you please confirm? 24+24 is harder to find.

Ok I am not a math person but I think you might be doing this the wrong way.

25-25 = 50 x 1.414 = 70.07 - rectifier 2 x 1.1 v = 68.5v

Single or double primary no difference, dual primary are easier to find. You won't have any trouble with 25-25 or 24-24 v sec.

Don't forget you are measuring V without load. You also said you have a 25Mtr run

Sorry about the links the forum shortened them.

[driftspin]

Ok I am not a math person but I think you might be doing this the wrong way.

25-25 = 50 x 1.414 = 70.07 - rectifier 2 x 1.1 v = 68.5v

Single or double primary no difference, dual primary are easier to find. You won't have any trouble with 25-25 or 24-24 v sec.

Don't forget you are measuring V without load. You also said you have a 25Mtr run

Sorry about the links the forum shortened them.

Hi Clive S ...

I was just compensating for the raised mains voltage 235 vs 230...

So what about the drives.
I understand leadshine does not manufacture am882 no more ? Where do those am882's come from then?
Good / bad clones?
Any reputable place to buy them ?

So... can one use the uc300 eth with gcode to control spindle speed over 0-10v from the ub1 ?

Is uc software licence bound to the motioncontroller or to the pc hardware?


Grtz Bert.



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[Clive S]

Bert I have had to much sauce tonight to be of any use. But there are plenty of drives to go for have you seen these:-
https://www.ebay.co.uk/itm/2DM860H-2...72.m2749.l2649

and then you have the AM806 drives

[driftspin]

Bert I have had to much sauce tonight to be of any use. But there are plenty of drives to go for have you seen these:-
https://www.ebay.co.uk/itm/2DM860H-2...72.m2749.l2649

and then you have the AM806 drives

Yes, Nr1madman has the same steppers from cnc4you as i.

And he actually bought those.
Do those have stall protection? I also have the dual X setup.


I know the am882 is tested and proven, so the safe route.

I have no preference yet. Did not do enough research yet. Guess i settled for the am882.

Grtz. Bert.

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[Nr1madman]

Yes, Nr1madman has the same steppers from cnc4you as i.

And he actually bought those.
Do those have stall protection? I also have the dual X setup.


I know the am882 is tested and proven, so the safe route.

I have no preference yet. Did not do enough research yet. Guess i settled for the am882.

Grtz. Bert.

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:D

I don't think they have stalldetect.
And I don't think stalldetect is as safe as everyone says ;)

The 2dm860 seems to have had an upgrade. The one that is linked to have a different cover than mine and seem to have more dip switches than mine with functions that I can only change with software (and cable)

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[driftspin]

:D

I don't think they have stalldetect.
And I don't think stalldetect is as safe as everyone says ;)

The 2dm860 seems to have had an upgrade. The one that is linked to have a different cover than mine and seem to have more dip switches than mine with functions that I can only change with software (and cable)

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Hi Nr1madman,


Did you go for ac or dc, and why?

Ac 70 volt or so is also a standard transformer.

maybe this one.
https://www.rapidonline.com/vigortro...-0-35v-88-3839

For Dc it says over 100 volts.



Grtz Bert.

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[JAZZCNC]

And I don't think stall detect is as safe as everyone says ;)

Not true Stall detect works very well when operating within it's parameters. What people misunderstand is that it only works above 300Rpm which really is where you want it to work when motors are spinning fast and where torque is lower.

[Nr1madman]

Not true Stall detect works very well when operating within it's parameters. What people misunderstand is that it only works above 300Rpm which really is where you want it to work when motors are spinning fast and where torque is lower.

I realize you are correct, I just haven't gotten into those speeds yet as I'm still testing, trying and learning :)
300rpm with 10mm pitch screws is 3000mm/min. That's more positioning for me and less routing. I do hope that changes for me as the parts would spit out faster..

But that wouldn't help if you crash into a clamp or something during acceleration at say 50rpm, then I would still get the possibility of losing "square"

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