Messages

6301

General Mach Discussion / Re: Stepper motors

« on: October 14, 2017, 09:21:33 AM »

Hi,
kool, let it rock...

Craig

6302

General Mach Discussion / Re: Stepper motors

« on: October 14, 2017, 09:18:53 AM »

Hi,
I didn't find that exact table but that is the model I think it is you have, so 4.2A is correct.

I think you are confusing the direction of the switch and it on position. Looking at the icon printed on the switch block 'ON' is with the toggle
to the right. The picture shows 123 as on,on,on.

Craig

6303

General Mach Discussion / Re: Stepper motors

« on: October 14, 2017, 09:11:59 AM »

Hi,
as I said earlier try reversing switches 2 and 3 only.

Craig

6304

General Mach Discussion / Re: Stepper motors

« on: October 14, 2017, 09:08:32 AM »

Hi,
the picture you posted shows 1,2,3 as ON,ON,ON which is 1.5A.
What you want is 1,2,3 as ON,OFF,OFF which is 4.2A

Notice the 'ON' icon and arrow on the dip switch block...

Craig

6305

General Mach Discussion / Re: Stepper motors

« on: October 14, 2017, 09:05:03 AM »

Hi,
can you double check that the motors are 100mm long? If they are then I'm fairly confident that they are 4.2A units.
If they're not then they could get hot and/or blow up. Given that I live I New Zealand I figure that I'm far enuf away you couldn't
hurt me anyway!

Until and unless you can get these motors sorted you machine is useless right? So are you going to take a chance to get them to work?

Craig

6306

General Mach Discussion / Re: Stepper motors

« on: October 14, 2017, 08:55:58 AM »

Hi,
the piece of paper doesn't match the picture. I would leave all switches 4-8 alone and reverse switches 2 and 3 only.

Craig

6307

General Mach Discussion / Re: Stepper motors

« on: October 14, 2017, 08:49:32 AM »

Hi,
kool that power supply sounds close to spot on.

I think you are right...all those switch positions sound wrong. I found the driver manual:
http://cnc4you.co.uk/resources/CW5045.pdf

Craig

6308

General Mach Discussion / Re: Stepper motors

« on: October 14, 2017, 08:33:30 AM »

Hi,
the only other possibility I can think of is that the PC is getting interrupted. We haven't established as fact that it is a parallel port machine.
What cable connects the PC to the controller/break out board? If it is parallel port then its entirely probable that the PC will 'stutter' and
cause little stalls and other funny behaviour. Its unfortunate but its the reality of parallel ports. In the first instance turn off ALL and EVERY
program you can.

What sort of PC is it? What version of Windows is it running? Is it 32 or 64 bit?

Craig

6309

General Mach Discussion / Re: Stepper motors

« on: October 14, 2017, 08:24:47 AM »

Hi,
best guess is they are 23 size steppers, you say they are 100 mm long then my guess is that they are 4.2A units 250 N.cm rated. That works out to
325 oz.in, plenty good. The drives are capable of up to 50V. Do you have a multimeter? Can you measure the power supply voltage or can you
see some specs written on it. For best speed you want it as high as you can go, if its 24V or less then its a joke and should be swapped with one with
36V or better 48V. Best to allow for full current for all motors simultaneously so rated current ideally 12.6A or better.

You should change the current switches so that the current is closer to rated.
SW1 ON
SW2 OFF
SW3 OFF
Should result in current of 4.2A. In practice the steppers may get too hot and you'll have to consider backing the current off. Dropping it to 1.5A is
too extreme.

The full/half current switch refers to the idle current, it can be left as is.

Craig

6310

General Mach Discussion / Re: Can not reinstall Mach3

« on: October 14, 2017, 03:00:33 AM »

Hi ted62,
did you ever get around to buying a good unit? How did it go?

Craig