On going chinese 6040 problems

[amxen]

OK so iv been trying to set up my 6040 cnc and to be honest i can run it and i have cut some MDF with it, but im not 100% happy with it. The problem i have is if i set the motor tuning to the recommended setting the steppers jam. To prevent this i have to run them at less than half the recommended settings. Here is a video of whats happening maybe someone can help,

https://www.youtube.com/watch?v=O3I8...ature=youtu.be

hope some one can help

[Clive S]

It would help if you gave some details about power supply, voltage, motor specs if you have them and driver.
That would be a start so people can make an informed opinion. ..Clive

[EddyCurrent]

Also do you have Mach3 set to mm or inches ?

[amxen]

yer sorry this is what i have

http://www.ebay.co.uk/itm/CNC-ROUTER...item2c5eac77af

and this is what in the box and the steppers




i dont know if that helps.. i also have mach3 set to mm .

thanks for the help Mick

[EddyCurrent]

It looks like you have this setup;

3163B Stepper Driver
set to;

Dynamic Current = 2.5A
1/8 Microstep
50% Standstill Current

57HD5401-14S/8 Stepper Motor

1.8 step angle
6.6V
3A
2.2 Ohms
8mH
17kg/cm
4 wire

24v 8.3A DC PSU
1605 ball screws


And that being so, the settings you have seem to be okay as far as I can make out.
However I did a conversion of the motor torque setting and 17 kg/cm = 1.6671305 Nm, this is not so good but as your video shows they are not under load.

I think you could reduce the microstepping and see if that helps, remember to change the Mach3 'steps per' to match.

5m pitch
1.8 deg motor
1/8 microstep (8)

360/1.8 = 200
200/5 = 40
8 * 40 = 320 steps per

------------------------------

Reduce microstepping to 2 by setting K1 ON, K2 OFF

5m pitch
1.8 deg motor
1/2 microstep (2)

360/1.8 = 200
200/5 = 40
2 * 40 = 80 steps per

[amxen]

ok thanks ill try that. im rite in thinking at the moment they are both set to on. so all i need to do is switch k2 down on all three . Then change the steps per to 80 . I do have 3 of these i could try and see if its any better if that dose not work .

http://www.ebay.co.uk/itm/EU-Free-Sc...item338efc0758

[Clive S]

I do have 3 of these i could try and see if its any better if that dose not work .

http://www.ebay.co.uk/itm/EU-Free-Sc...item338efc0758

The problem with these motors in the inductance is far too high. Check these out:- http://cnc4you.co.uk/resources/60BYGH301B.PDF and see the difference, the motors you have require a much higher voltage to drive them. I would be selling them and getting some with lower inductance. ..Clive

[amxen]

The problem with these motors in the inductance is far too high. Check these out:- http://cnc4you.co.uk/resources/60BYGH301B.PDF and see the difference, the motors you have require a much higher voltage to drive them. I would be selling them and getting some with lower inductance. ..Clive

Now you have lost me with inductance. i got this kit awile ago with the plane to make my own cnc but ended up buying one . this is the kit i have spare

http://www.aliexpress.com/snapshot/6104230003.html

but i was thinking i could just use the stepper motors if the ones im using arnt up to it. So is this not the case ?

Are you saying my power supply is not upto the job because if thats so could i not just swap it out for the 36v one i have ?

[EddyCurrent]

On the picture I looked at it says on the terminals 24V, Gnd, so are you sure it can be powered by 36V ? if it can then it might be a good idea to try the other supply.

[Clive S]

On the picture I looked at it says on the terminals 24V, Gnd, so are you sure it can be powered by 36V ? if it can then it might be a good idea to try the other supply.

I agree I have a feeling that those drivers are only OK up to 24V So unless you like magic smoke don't go higher. Clive