Slow feed speeds (IPM)

[Cayenne]

Hello All, I have a 4 axis kit from A.T. on a Taig Micro Mill using 3 axis at the moment. My problem is I can't seem to get the feeds above 18-IPM. I have tried what I believe to be all combinations of settings in Mach3 and LinuxCNC to no avail. The Z axis is set a little slower. any faster on any axis' and I lose steps. Even when I loosen the slides, lead nuts, and lead bearings it doesn't seem to make difference. Does anybody have any ideas???

We have a similar set-up at a maker space near Me and it gets nearly 100-IPM! The only difference is it has Gecko Drives and slightly smaller steppers (the motion control system is from A.T. as well)

I'm thinking I need more amps and/or volts???

Thanks for Your time, Carl


---425 oz-in stepping motors, NEMA 23
---KL 4030 3.0Amp 24-40 Volts, 1-1/64 microstepping drivers
---36VDC/ 9.7A Power Supply
---C10Breakout board

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[ger21]

Those motors are a very poor choice for that machine. Iirc, those motors need over 100V to get maximum performance from them. Smaller, low inductance motors would be much faster. Better quality drives can also give better performance.

[Cayenne]

I thought I was buying a matched system from Automation Technology, I knew the drivers were on the low end....Do You know of a resource that explains exactly what is happening when a pulse is sent, the timing issues with Dir and Pul and the different parameter settings? I would like to know exactly how these steppers are controlled and what tends to make them fail. Thanks again..

[engele]

I know that some mills larger than yours have used those Automation Technologies 425a steppers. Those were recommended to me for my mini mill conversion and I have them (but have not hooked them up). Best of luck.


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[automationtechinc]

pls call our support Engineer, we will help you. You should run at 150 ipm for Taig machine

did you set current to 3A?
did you set the microstep to 8 (1600)

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[Cayenne]

150" ipm ??? really? Do you realize that is 3000 rpm (20 tpi leadscrew) and 80,000 pulses per second (the torque curve ends at 2000rpm)?? According to the torque curve for this motor that would be almost NO torque at 80 volts with a KL8060 driver that is rated at 6 amps. Your package is 36volts with 3 amp. KL4030 drivers.

Please give Me your support "engineer" phone number.

[Cayenne]

Could an engineer comment on this motor's performance @ 36 volts/3 amps, 3000 rpm, and 80,000 pps? Thanks

[Cayenne]

YO!

[ger21]

I wouldn't count on any stepper giving you more than 1200-1500 usable rpm's.
Most people run their steppers at less than 1000 rpm.

What drives are you using?

With a very good drive, and 48V, and a low inductance (<2mH), you might be able to get around 2000 rpm with your machine.

[Cayenne]

Thanks Ger21, I'm trying to contact a rep of A.T. looks like He is playing the quiet game, he hung up on me yesterday. I have been conversing with you on the same subject in this thread------->Slow IPM ! Desperately needing help

[Cayenne]

! YO ! Company Representative whats it going to be? You going to play the quiet game? I have been trying for months to get some tech support or help! You don't answer your email, skype, or Your forum post.

[automationtechinc]

What kind of ball Screw did you use? if you use the 5TPI, it will run fast. We do not play any game here. We support all our customer
Pls contact us, We will help you.

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[automationtechinc]

Most use 5 tpi leadscrew, not 20 tpi leadscrew

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[Cayenne]

Taig micro mill has always had a 20tpi lead screws. You said 150 ipm with this hardware but that is PHYSICALLY impossible! You could have saved me a lot of money and time 10 months ago if You only knew Your products and how to read and do math instead of instantly blaming the customer and everybody else. I'm sick and tired of running around in circles and playing games with You. You shouldn't hang up the phone on Your customers and answer Your email!!!!!

[engele]

Cayenne, are you using the stock lead screws or did you do the ball screw conversion to reduce backlash?

[Cayenne]

Stock 20tpi, what are you using?

[engele]

I am converting a different mill, a G0704, and am going to buy ballscrews. I also have the 425oz steppers (though I know they are less popular than the 570s.

[Cayenne]

What is Your lead screw pitch?

[engele]

The ball screws I intend to buy are 16mm screws that will have a 5mm pitch.