Nema 23. Slow

cncbasher wrote:

i'm guessing you may have a faulty stepper driver ..especialy as the voltages you have measured are different on the z and you say the motor is hot
although it is quite normal for steppers to be quite warm to touch and give the impression of a fault , remember stepper motors are energised also at the stationary point , hence why they run hot

are all your motors the same ? i.e the wiring is identical between them all ? i'll presume they are .

try swapping the stepper motor wiring from the z to say drive x and see if the motor runs ok . if yes then I would say the z stepper driver is faulty
check the dip switch settings for the z axis and make sure they are correct ..

This one was to hot to touch. You would burn your hand.

All motors are wired the same Black , Yellow , Red , White. All 4 motors are also the same model.

Motor runs when plugged into another axis.

I have decided that the controller card is bad. So I am getting a new one.
I ordered another TB6560 blue one from E-Bay. It will be a couple of weeks
until it arrives . With some new hospital and doctor bills needing my
attention I had to go this route.

I will post again when I get the card.

Thank You

Can someone explain how to connect Black Yellow Green together and the Red White and Blue.
the way they show in the attached PDF file. connecting the 3 wires is supposed to give better speed.
I have seen others that show wiring the 3. They do not really show what gets connected to what. I am
using the TB6560 blue controller board.

Thank You

Using all six wires like the diagram on the left is only for a unipolar stepper driver. Since you have a bipolar driver you have the option to wire it like the diagram on the right, which does give you the highest holding torque and very low speed torque. If you instead use one of the center taps and one of the other phase wires for each phase then you have wired the motor half coil. Although there is a small penalty in holding torque and low speed torque, you will get much more speed and have much more torque available at anything but a crawl. Google the subject and read up on it--you'll probably decide that you need to use half winding. Or try it both ways and see for yourself. You need to set your stepper driver max. current appropriately for each of the two wiring options.

I have been working on the machine. I have been keeping up with all replies.
I did receive the new controller card and all 3 axis are working.I will be doing some testing
tonight or tomorrow. I will keep everyone informed. I am sure I will have some more questions.

I will now need to get to the nuts and bolts on how to cut things. Any suggestions for reading
that is easy and simple. Just some basics to get going.

Thank all of you for the help so far. It has been great.

Don

Glad to hear you are getting it sorted out.
You might look here...
www.sherline.com/CNClinks.htm

Rick G

I just saw this topic and decided to also drop in for some help

As I have previously posted, my motors are running very slow but stable...
slow, I mean somewhere around 10~20mm/sec...

however, when I turned up the velocity say from 10mm/s to 11mm/s...
it will start to vibrate, or just sounds of vibrationg and not moving at all..
then it comes a high pitched, frequency sound...

and i have to hit cancel on LinuxCNC

tried these with the 3 driver boards that came, and also with 3 different motors...
cross-connecting them as I go, so I have tried the same and are true for all 9 so times, as I switched...

I am unsure if this is due to not enough "ground"?
because I am using the controller board GND, which came from the USB-to-PC, and then splicing them to all the 3-driverboards...

I'm unsure if I can just send these GND from driver boards into a big piece of metal?
say... the framework of the CNC? since I made it using metal?

any help here would be very much appreciated...

•3 pcs Nema 23 stepper motor with 425 oz.in,3A
•3 pcs Stepper motor driver DM542A, 24-50VDC, 128 MICSTEPS
•1 pc 350W-36V power supply

its running on half-step, if i remember correctly...
here's the link I posted once, with the settings I'm using...

www.linuxcnc.org/index.php/english/forum...42-step-timespacedir

thanks =)

rgr tht