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View Full Version : The 2DM860H chinese controllers vs the rest?



Nr1madman
04-03-2017, 07:26 PM
Hi!

Anyone tried the 2DM860H chinese controllers?

Any good? :cower:

They probably cant beat the AM882 or EM806, Im aware of that.
But a damn bit cheaper :beguiled:

Nr1madman
07-03-2017, 08:36 PM
Aaaw come on, doesn't anyone have experience?
It might just be an dm860 in a new box :D

njhussey
07-03-2017, 09:12 PM
Nope....AM882 only for me sorry.....

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Nr1madman
08-03-2017, 07:37 PM
I know I should go the same route. But the cost makes me look around hehe

njhussey
08-03-2017, 07:55 PM
Thing that persuaded me was they were tried and tested by others. My machine was cutting acetal plastic all day today and just doesn't miss a beat...priceless 😁

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magicniner
09-03-2017, 07:55 PM
I know I should go the same route. But the cost makes me look around hehe

Why not buy some and review them for us? :D

I've learned that cheap parts often aren't the cheapest way ;-)

Nr1madman
09-03-2017, 08:24 PM
Why not buy some and review them for us? :D

I've learned that cheap parts often aren't the cheapest way ;-)

Haha I know that this is good advice :D
But Im leaning towards the am882 because of the stall detect. I will be using 2 motors for x axis and it would be disaster if one was stalling..
Deep inside I know that this is the wrong place to save £50

Nr1madman
01-11-2017, 02:32 PM
I had to try these :D
Call me an idiot but who knows. .they might work just fine hehe

How should the dip switches for current be adjusted? Peak current or RMS current?

On the drivers there are rj45 jacks.. I wonder if there are some software for tuning?
Got no manuals so I think I'm gonna search the Web for something useful :)

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magicniner
01-11-2017, 07:11 PM
Got no manuals so I think I'm gonna search the Web for something useful :)

Starting to see why "cheap" isn't always Cheap? :D

Nr1madman
01-11-2017, 08:57 PM
Starting to see why "cheap" isn't always Cheap? :DHaha I know, I know!
Found the manual online atleast :D
It actally had info about the connector I wondered about. Was serial connection for parameters. :) Have to look up what kind of software to rule this thing!!

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Nr1madman
21-11-2017, 11:00 AM
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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Ger21
21-11-2017, 03:44 PM
I'd set the drives to 4 amps peak?

Nr1madman
21-11-2017, 05:14 PM
I'd set the drives to 4 amps peak?Thanks Ger!
Will try that ;)

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Neale
21-11-2017, 06:10 PM
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.

Nr1madman
21-11-2017, 06:23 PM
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.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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