Stepper and driver matchup

[WrineX]

HI there , i had a question about datasheet and matching the driver for it.


i wanted to buy 3 of these drivers

http://www.impulsecnc.nl/datasheets/...%20English.pdf

rated at 4.2 A peak. and wanted to use these motors

http://www.impulsecnc.nl/datasheets/...%20English.pdf


Phases 4 so it has 8 wires and rated current in series is 4 A and in series 2A

now the question is i wanted to use these motors in paralel on my old crappy machine to build some parts of the new machine that is gone be driven by belt therefor the motors will be connected in series so i get more torq at low speed.


but i would like to run them on my old machine first in paralel.

no it states 4 A in paralel on the motor data sheet and 4.2 on the driver. is this gone work without frying the driver? i mean its below the peak but i really dont know if this is peak or RMS on the motor. i know its stated peak in the driver manual so RMS is lower.


question remains , is it still save for the driver if the motor demanded more ampere then the driver can deliver? i mean is just just not gone have all the torq stated but leaves the driver in one peace? because i am gone use them in serial connection later on i really would not like to buy bigger drivers just so i can use them few months in paralel.


hope somebody knows more about this

[James Newton]

If the driver is current regulated, the motors can't demand more current than the driver is set to supply. As to how much current the motors can use depending on how they are setup, this page lists all the possibilities:
Stepper Motor Connection Options

[WrineX]

So THE steppers cant Burnout THE board ? It just has less torq if it cant deliver ?

[WTFO]

Hi!
The first link was for a motor, so I can't tell you about the driver you are looking at. I found this, which may be it:

http://www.impulsecnc.nl/datasheets/...nualM542V2.pdf

If so, then James point about regulated current applies. This drive lets you select the current, which you would want to set below 4 amps, so that the motor does not get too much.

Unless you need maximum holding torque you should use the idle current reduction. this will help keep operating temperatures down.

Good Luck!