Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: spitter on January 04, 2014, 06:31:13 PM

Title: Cannot get to 200 IPM
Post by: spitter on January 04, 2014, 06:31:13 PM

I have 2 motors on my X axis. I cannot get that axis to 200 IPM. I can get my Y axis with only one motor up to 200 IPM. Motors are kl-223h286-20-8b Drivers Kl 4030 power supply kl-350-36. all by keiling. I also have a smooth stepper usb type running version v17f and mach3 version 3.043.066. Do I need more volts to run the two to 200. Meaning buy another power supply.
Scott
I attached xml file

Title: Re: Cannot get to 200 IPM
Post by: RICH on January 04, 2014, 06:56:28 PM

Post a link to your power supply and motors.
That will save folks time.

RICH

Title: Re: Cannot get to 200 IPM
Post by: Picengraver on January 04, 2014, 07:24:56 PM

Also, tell us what speed you are getting on X.
John Champlain

Title: Re: Cannot get to 200 IPM
Post by: spitter on January 04, 2014, 08:01:54 PM

link to motor 6th one down 425 oz http://www.kelinginc.net/NEMA23Motor.html (http://www.kelinginc.net/NEMA23Motor.html)
link to power supply 36v/9.7a  http://www.kelinginc.net/SwitchingPowerSupply.html (http://www.kelinginc.net/SwitchingPowerSupply.html)

I can get 100 ipm on all axis, 3d machining with no problems. Fastest I can get on the x before stalling 135.

Title: Re: Cannot get to 200 IPM
Post by: ger21 on January 04, 2014, 08:38:41 PM

First, the 425oz Nema 23's are about the slowest ones you can choose, due to their high inductance.

What kind of machine is this, and how are the axis driven?

Title: Re: Cannot get to 200 IPM
Post by: spitter on January 06, 2014, 01:11:13 PM

Machine is DIY. Axis is direct drive. coupled with a delrin coupler. Lead screw is acme 1/2-10 5 start with delrin anti-backlash nut . Ways are 15 mm Hiwin rail.   

Title: Re: Cannot get to 200 IPM
Post by: garyhlucas on January 06, 2014, 06:29:36 PM

I'd look at the voltage when the X axis is moving. I see that the power supply is a switcher and it may simply reduce the output voltage if it asked to supply more than rated current.  I suspect this because you seem to only have the problem with two motors running at the same time. Also has someone else said the motors you have are high inductance so the back emf rises quickly and the torque falls way off as a result.  Lower inductance motors can run faster at the same voltage.

Title: Re: Cannot get to 200 IPM
Post by: Mogal on January 06, 2014, 07:26:21 PM

I have the same steppers and PSU. (my acme rods are 1/2-10 double starts)
I got the C10 and KL-4030s.

I was having speed issues as well, maxing out at 60ipm before loosing steps.
After much reading I stumbled across this thread:

http://www.cnczone.com/forums/stepper_motors_drives/32284-take_stepper_damper.html

It more then doubled my speeds! Now I'm reliably at 160ipm in my travels.

Chris

Title: Re: Cannot get to 200 IPM
Post by: RICH on January 07, 2014, 05:30:43 AM

Why is 200 IPM so important to you?

RICH