MK1 Steel router build log 1500x800x200

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Originally Posted by Clive S

Attachment 24048Attachment 24049Attachment 24050
The black tube into the reg. is feeding the air into the blue water filter with WD in it (just behind the gantry) and also to blow the chips away. You can see the cooling water 1Ltr on the gantry.

The fan is 120mm

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Ok,

I realise now i need a solution for connectionbox sensor to cy cable.

Thanks for the pictures.

I am gonna think about through gantry cable ways for x1 x2 sensors..

Some extra planning.

Grtz Bert.

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Quote:

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Originally Posted by Clive S

I use something like this on the back of the gantry with less that 1 ltr of water. https://www.aliexpress.com/item/80mm...ceBeautifyAB=0

but you can get one with a little bigger and fit a 120mm fan.

Re the VFD 2.2Kw is at the mains side so at the motor side rough figures prb. about 4A per phase ish.

re the 4mm tube I find that more than enough flow. I have it at about 8 bar and regulate it down on the gantry.

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Hi Clive S,

Do you think the leadshine dm856 will do for my setup?

http://www.leadshine.com/productdeta...DM&model=DM856


Or will i gain lots in buying am822 drives.
I am not sure i can still buy them oem ... Though somebody said there is nothing wrong with a good copy.

They look alright @80v /5.6 amps

I have the cnc4you 4amp 4nm nema23 steppers.

Grtz. Bert

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I have no experience of them but they look OK I see they only go up to about 5.6A might be getting a bit close!!

I have purchase three of these:-

https://www.ebay.co.uk/itm/2DM860H-2...7453%7Ciid%3A1

But not tested yet.

Quote:

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Originally Posted by Clive S

I have no experience of them but they look OK I see they only go up to about 5.6A might be getting a bit close!!

I have purchase three of these:-

https://www.ebay.co.uk/itm/2DM860H-2...7453%7Ciid%3A1

But not tested yet.

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Hi Clive S,

I am unsure what using 4 out of 5.5 amps will do to the drives life time.
25% headroom sounds ok.


I do like the idea of having an alarm ouput also.

Do you have any idea on when you have the drives up and running?


Grtz. Bert.



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Quote:

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Originally Posted by driftspin

Hi Clive S,
I am unsure what using 4 out of 5.5 amps will do to the drives life time.
25% headroom sounds ok.
I do like the idea of having an alarm ouput also.
Do you have any idea on when you have the drives up and running?
Grtz. Bert.
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No sorry the control box is built but the mill it is going on will take some time. I purchased the above because am882's are getting hard to find.

Quote:

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Originally Posted by Clive S

No sorry the control box is built but the mill it is going on will take some time. I purchased the above because am882's are getting hard to find.

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Hi Clive S,


I have been researching some more.

Do the spec of stepper memtion rms or peak amps? Looks like the 2dm856 driver is rated 4 amp rms ...... 5.5 peak.

https://cnc4you.co.uk/resources/Step...1-03%204Nm.pdf

Are those rms values?
Ill send an email to cnc4you and find out.

Grtz. Bert.

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Quote:

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Originally Posted by driftspin

Are those rms values?
Ill send an email to cnc4you and find out.

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They are Peak ratings, most motor ratings if data sheet doesn't show both will be the peak rating.

Also, I have some of the 2DM860H but only tested on the bench at the minute. however, they seem nice smooth with low motor heating even after being stood for hours. This is always a good sign because lose motor sat on bench is open to resonance and the drive is obviously handling any resonance because nice smooth operation.
Will tell better when put on a machine but so far I wouldn't tell the difference between these and AM882.

Quote:

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Originally Posted by JAZZCNC

They are Peak ratings, most motor ratings if data sheet doesn't show both will be the peak rating.

Also, I have some of the 2DM860H but only tested on the bench at the minute. however, they seem nice smooth with low motor heating even after being stood for hours. This is always a good sign because lose motor sat on bench is open to resonance and the drive is obviously handling any resonance because nice smooth operation.
Will tell better when put on a machine but so far I wouldn't tell the difference between these and AM882.

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Awesome! Awaiting your final judgement since I have those drivers :)
Have you altered any settings via software or only dip switches?

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Quote:

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Originally Posted by driftspin

Hi Clive S,


I have been researching some more.

Do the spec of stepper memtion rms or peak amps? Looks like the 2dm856 driver is rated 4 amp rms ...... 5.5 peak.

https://cnc4you.co.uk/resources/Step...1-03%204Nm.pdf

Are those rms values?
Ill send an email to cnc4you and find out.

Grtz. Bert.

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Ok so answer of CNC4YOU... it is peak.. 3 amps RMS.

I guess ill order the leadshine dm856 then.

Save a few bucks to spend on some other things.

Grtz Bert.


Now i have to find some other way to hook up a big flashing red alarm light.



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Hi JAZZCNC,

Peak it is... so... i can save a few bucks.

Thanks Bert.

Quote:

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Originally Posted by JAZZCNC

They are Peak ratings, most motor ratings if data sheet doesn't show both will be the peak rating.

Also, I have some of the 2DM860H but only tested on the bench at the minute. however, they seem nice smooth with low motor heating even after being stood for hours. This is always a good sign because lose motor sat on bench is open to resonance and the drive is obviously handling any resonance because nice smooth operation.
Will tell better when put on a machine but so far I wouldn't tell the difference between these and AM882.

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