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Author Topic: incresing speed on stepper motors  (Read 20554 times)

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Re: incresing speed on stepper motors
« Reply #10 on: January 23, 2011, 11:18:31 AM »
WOW! Thanks for all the replies!

I have the 2x3 gantry router from here:
http://www.finelineautomation.com/

I am using Acme 1/2-10 screw with NEMA 23 BIPOLAR STEPPER MOTOR 425  oz-in KL23H286-20-8B motors on all three axis.
http://www.kelinginc.net/NEMA23Motor.html

I have everything setup as direct drive. They are wired as bipolar series on the PDF file.
http://www.kelinginc.net/KL23H286-20-8B.pdf

The velocity is set to 10 and acceleration is set to 7. If I go to much higher meaning 12 or 13 it stalls.

I am using this 3 axis board and it is currently set to 1-full step
http://celticmachining.com/2x3-machine/mach3-settings.htm
Re: incresing speed on stepper motors
« Reply #11 on: January 23, 2011, 11:20:58 AM »
Right now everything is running really wel and accurate - just very slow. :)

Thanks for all the help!
Re: incresing speed on stepper motors
« Reply #12 on: January 23, 2011, 11:24:50 AM »

Offline Hood

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Re: incresing speed on stepper motors
« Reply #13 on: January 23, 2011, 11:39:27 AM »
My thoughts
Using a voltage nearer the 36 volts max of the drives should help a lot,
Setting to 8 microsteps should help smooth things out.
The power supply you are using is a bit on the neat side for current, would be better another amp at least I would say.
Screws with more pitch/starts would also help.


Hood
Re: incresing speed on stepper motors
« Reply #14 on: January 23, 2011, 11:41:11 AM »
Your biggest problem by far is that power supply.  You should be up around 30-35V for best performance.  Your drivers are limited to 36V, which is kinda low, but you want to stay a little below that, for safety.

Regards,
Ray L.
Regards,
Ray L.
Re: incresing speed on stepper motors
« Reply #15 on: January 23, 2011, 11:42:23 AM »
BTW, with better drivers, like Geckos, and a higher voltage supply, you could almost certainly go much faster...
Regards,
Ray L.
Re: incresing speed on stepper motors
« Reply #16 on: January 23, 2011, 11:56:15 AM »
Thanks!!!

I am saving for a Gecko 540 and better power supply.

Offline stirling

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Re: incresing speed on stepper motors
« Reply #17 on: January 23, 2011, 12:08:38 PM »
yep - you're in all sorts o doodoo with your combination of things. If speed is your quest then for starters you'd be better off wiring parallel. For 3 such motors as the KL23H286-20-8B in parallel you want PS and drive setup capable of around 5.6 to 6A (total). @ around 83V.
Driving them in serial - waaaaay undervolted is not going to get these puppies singing. BTW your KL23H276-30-8B motors (pictured in your other thread) are more beefy but no way you're going to drive them with your current setup. Just mentioning that so if you decide to up your PS/drivers - personally I'd go with these other motors instead.

Ian
Re: incresing speed on stepper motors
« Reply #18 on: January 23, 2011, 12:16:38 PM »
Current plan -
Rewire for parallel instead of serial??

Future plan to increase speed
Gecko 540 and what voltage/amp power supply using the motors I am using??

These are my beefiest motors. I don't have motors any bigger than these.
Re: incresing speed on stepper motors
« Reply #19 on: January 23, 2011, 12:16:56 PM »
THANKS EVERYONE FOR THE HELP!!!!!!
:) :)