Insane stepper motor speeds

Not sure if this has already been posted, but IMHO this is crazy fast:
A Better DIY Stepper Motor Driver

Using decent drivers with the right voltage most NEMA23 steppers top out at about 1000 RPM, that would equate to about 800mm/second.
NEMA17's should run even faster because of the smaller mass. Most printers don't run anything near optimum voltage and that greatly reduces the maximum speed.

Crazy fast? This is what RepRap electronics can do since ... over a year? See [vimeo.com] The electronics used in the video was a Generation 2 Electronics, featuring an ATmega168.

Stepper speed is limited by the available motor voltage and with microstepping, by the efficiency of the controlling processor. In the YouTube video he claims a step rate of 25'000 steps/second, which is roughly what current RepRap firmwares reach, too. Not with one axis, but with four of them, synchronized.

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Generation 7 Electronics	Teacup Firmware	RepRap DIY

The demo had no load. I think the torque would be so low at that speed that it couldn't drive much.

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[www.hydraraptor.blogspot.com]

... I have three of this drivers: [www.imshome.com]

The biggest problem with them is - where to find a controller capable of 10MHz stepping frequency

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Viktor
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Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]

VDX Wrote:
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> ... I have three of this drivers:
> [www.imshome.com]
>
> The biggest problem with them is - where to find a
> controller capable of 10MHz stepping frequency

I'd suggest using a FPGA. Generating 10MHz is pretty easy for them, since sub 10ns parts are widely available and inexpensive.