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Author Topic: Still unable to get motors to turn under mach 3 after 1.5 weeks  (Read 9320 times)

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Offline olf20

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Re: Still unable to get motors to turn under mach 3 after 1.5 weeks
« Reply #10 on: December 22, 2007, 04:04:51 PM »
Hi all.
cliveastro, this may be a little off your particular problem, but I fought my setup for awhile and found that despite the wiring diagram on the breakout board (CPC4PC) I had to wire it up with two 5V sources. One from the computers USB port, and another external one (old computer power supply). If you look at the web site downloads it will show two differant ways to wire the breakout board. The reason you can not use the USB port for both is the amount of current that the USB port can supply. Does any of the led's on the breakout board turn on / off when you move a axis one directions then the other?? This would tell you that the signal is getting to the breakout board. Are you using Gecko drives??
Hope this helps!
olf20
Mach3, Atlas Knee Mill, 4th Axis, VcarvePro, ESS, Super PID.
Been Heating with corn since 1998

Offline TonyP

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Re: Still unable to get motors to turn under mach 3 after 1.5 weeks
« Reply #11 on: December 22, 2007, 04:40:10 PM »
When you checked your step pulse with the 'scope, did you do it with the drive connected?

Tony
Re: Still unable to get motors to turn under mach 3 after 1.5 weeks
« Reply #12 on: December 22, 2007, 06:13:02 PM »
I will give that a go.
I did put my meter across the 5v and the 24v ground and got a 5v reading so there is one.

Clive
Re: Still unable to get motors to turn under mach 3 after 1.5 weeks
« Reply #13 on: December 22, 2007, 06:20:27 PM »
Sorry missed a couple of comments.
Regarding the Led on the breakout board there is only one to show that the 5v is on, and it does not go off.
My 5v psu will give 1 amp which should be loads.
Regarding the scope I tried it both ways and I got a pulse but not being very good with a scope I dont know what the voltage was.

Clive

Offline olf20

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Re: Still unable to get motors to turn under mach 3 after 1.5 weeks
« Reply #14 on: December 22, 2007, 09:37:20 PM »
cliveastro, what breakout board do you have, and what drive controllers?
Thanks olf20
Mach3, Atlas Knee Mill, 4th Axis, VcarvePro, ESS, Super PID.
Been Heating with corn since 1998
Re: Still unable to get motors to turn under mach 3 after 1.5 weeks
« Reply #15 on: December 23, 2007, 02:18:47 AM »
Success, motor now turning.
I sent John at Keling an email and he sent me a mach3 set up guide and I noticed that the setting in the motor setup had step and direction enabled, the text explained why.
So I tried it and Bingo it worked.
Previously I had watched the mach3 video setup guide and I either missed it or the relevance to it.
Many thanks to everyone for the their help and suggestions.
Kind Regards

Clive

Offline KTM

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Re: Still unable to get motors to turn under mach 3 after 1.5 weeks
« Reply #16 on: December 23, 2007, 04:03:54 AM »
Hi Clive

Congratulations
I am happy that your machine is sorted. I missed that one in your XML. -Slap forehead - In motor tuning  the step pulse and direction pulse time were set to zero.

The answer is always simple when you know what it is.

KTM

Offline TonyP

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Re: Still unable to get motors to turn under mach 3 after 1.5 weeks
« Reply #17 on: December 23, 2007, 05:56:59 AM »
That's great,

it's always something small, tucked away in a corner, that stops things. Now you can really have some fun!

Tony
Re: Still unable to get motors to turn under mach 3 after 1.5 weeks
« Reply #18 on: December 23, 2007, 12:04:57 PM »
Thanks to everyone.
I wired it up with my charge pump, but that doesnt work, so my decision is wire charge pump out, to keep it simple.
This way I can get things going.
What are the general thoughts on charge pumps? Are they really necessary?
Re: Still unable to get motors to turn under mach 3 after 1.5 weeks
« Reply #19 on: December 23, 2007, 12:28:15 PM »
Hello Clive,
So glad you got it going.
I elected not to go with a charge pump. I'm the only operator/user. If I built one for anyone else, or had another operator, I would definitely use a pump as well as doors with switches or maybe a light curtain. (Liability)
I use a separate on/off switch for everything except the PC and monitor. I turn on the PC and monitor, let the PC boot up completely, (I think this is where the pump is most necessary), then power up the power supply and driver box.
Never had more than 1 "click" when motors power up and hold.
Please keep us posted on your progress.
Let's see a post with a photo of your rig in the "Show n' Tell" forum.
Take care,
RC

Oh yeah...one more thing.
Mach is not controlling my spindle. If it were, I would use the pump. Changing parts manually in a lathe, or cutters in a mill/drill , is inviting disaster if the PC and Mach have control of the spindle motor.
« Last Edit: December 23, 2007, 12:42:00 PM by Overloaded »