The 2DM860H chinese controllers vs the rest?

Alrighty!

Might be an idiotic buy after all ;)

So.. current configuration? Should I match peak or RMS settings on the dip switches?

Have 4amp motors (4nm nema23 from cnc4you)
If going for RMS setting for the driver I get 3.42A RMS 4.78A peak.
If going for peak current I get 3.15A peak 2.15A RMS or a slight overshoot at 4.03A peak 2.88A RMS.

For me this seems like really bad options for maximizing my motors.
I know the AM882/EM806 have software options for fine tuning current but this driver does not seem to have this.

So.. what says the experts? :D

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I'd set the drives to 4 amps peak?

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Originally Posted by Ger21

I'd set the drives to 4 amps peak?

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Thanks Ger!
Will try that ;)

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I would read the data sheet and set the current to something reasonable. That is science.

Once the machine is running, adjust it so that the motors run at a temperature that is just about as hot as you can comfortably hold, which is around 60C. That is engineering...

Seriously, stepper motors are designed to run hotter than you might expect. More current gives better performance as long as you do not overheat them. Those current readings are really only a guide or a rough starting point, not absolute limits. Remember to set the stationary holding current to half (usually a dip switch setting) which helps keep them a little cooler while not moving.

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Originally Posted by Neale

I would read the data sheet and set the current to something reasonable. That is science.

Once the machine is running, adjust it so that the motors run at a temperature that is just about as hot as you can comfortably hold, which is around 60C. That is engineering...

Seriously, stepper motors are designed to run hotter than you might expect. More current gives better performance as long as you do not overheat them. Those current readings are really only a guide or a rough starting point, not absolute limits. Remember to set the stationary holding current to half (usually a dip switch setting) which helps keep them a little cooler while not moving.

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This is just what I wanted to hear!
Thanks!

I realise why they mark up both peak and RMS current. But it's still misleading when you want a safe maximum ;)

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Quote:

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Originally Posted by Nr1madman

This is just what I wanted to hear!
Thanks!

I realise why they mark up both peak and RMS current. But it's still misleading when you want a safe maximum ;)

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Hi Nr1madman,

What is the verdict on the drives?


Grtz Bert..

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Originally Posted by driftspin

Hi Nr1madman,

What is the verdict on the drives?


Grtz Bert..

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Oh let me get back to you in a couple of months :D
Im just starting to learn my router.

What I do know is that they move my motors and I haven't had any issues (yet). Would the machine move faster/cooler/quieter with am882s.. I have no idea!! :)
I bought 2 drivers first with the plan of buying 2 am882s for my dual motor axis but in the end I ordered 2pcs of 2dm860s more. The first two I got had metal casings. The last two had metal bottom and heatsink but plastic cover :)

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Quote:

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Originally Posted by Nr1madman

Would the machine move faster/cooler/quieter with am882s.. I have no idea!! :)

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I've just got 4 to use on a machine so I'll tell you the difference.!

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Originally Posted by JAZZCNC

I've just got 4 to use on a machine so I'll tell you the difference.!

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Awsome! Thanks ;)

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Quote:

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Originally Posted by JAZZCNC

I've just got 4 to use on a machine so I'll tell you the difference.!

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Hi JAZZCNC,


It would like to know too...

Grtz Bert.

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