[DonW]

Will this work with any motor, or is this lmited to one particular model?
Does it require a modification to a/the motor?
If this driver is designed for one specific motor, what is the resulting continuous torque of that specific motor, and what are the applications it is designed for?

So it sounds like someone can now use a lower torque stepper to achieve more power at higher speeds?
Unless I'm completely lost, it sounds like a higher torque rated motor is less necessary since now a motor will be able to maintain keep the torque from dropping off at higher RPM's.
Because Power is T*RPM's, since a stepper's torque drops off at higher speeds, power is lost. So having found a way to stabilze torque at higher speeds would be the key so that power is not lost. Correct?
Therefore power at higher speeds would be possible due to a modified torque curve.

I've been hearing a lot lately about mid-band resonance with steppers. What are the concerns with this now? If I recall, the 203V's are supposed to be able to dampen or eliminate MBR. Can I assume the new drive will do this also?

Sorry to be so lengthy... I find it pretty interesting.

Thanks.

[307startup]

So are you going to make this super-stepper/servo drive unkillable like the 203V...sort of a 340V? And will this new driver also need software, or will everything be electro/mechanical? I'm referring to making the stepper behave properly or "tuning" like with a servo.

[307startup]

Update please, Mariss!

[Mariss Freimanis]

Funny you should ask. I just finished hand soldering the first step servo control circuit test board (see thumbnail). This board will control the motor winding switching algorithms. Unlike an open-loop step motor, the servo step motor will stay cold with no load applied even at 3,000 RPM with this circuit. That's the theory, the board is stuffed and in a week when testing begins on this portion of the servo, we'll see if reality matches theory.

Mariss

[turmite]

Hi Mariss,

I saw another reference to this project today on another thread and am curious if the information given is correct. Is this PID driver going to have to be used in conjunction with the Grex or ???

Mike

[ger21]

Mike. See post #6

[turmite]

Thanks Gerry,

So it will need the G100 board at least. At this point doesn't matter since I still feel this is goin to be the next great advance in motion technology.

Mariss I know you are careful to give estimated dates and such and I know you have given a rough timeframe, but any update on that as to a closer window?

Mike

[ger21]

No, read it again. It will be a standalone servo drive, but will also be able to be used in conjunction with the G100 as the unstallable stepper.

[Mariss Freimanis]

It won't take a G100 at the least; it will take a G100 at the most.:-)

Even without a G100 it will be one killer of an AC servodrive on its own at $200 (including a 500-line encoder with each servodrive). Step motors will become 2 to 3 times more powerful. With a G100 it will be a truly unstallable motion control system.

I'm not careful about time estimates only because I don't have a clue either. It is a terrific adventure to design something new. You don't know with every step what the next step will bring, whether it be backwards or forwards. You run into something new you don't understand and it's a step backwards until you learn about it. It's a step forwards if what you have learned leads to a breakthrough and the next step is the reward. Either way it's like the most thrilling combination chess and video game you have ever played and it lasts for months upon months. No other high to equal it.

Mariss

[307startup]

Mariss...
this is your public speaking. Update please!

[DennisCNC]

How is this drive coming along?

[CoAMarcus]

The stepper servo has been sidelined for the moment while we finish up with the cheap drive, the G380V and the G213V. Once those drives are completed, fully tested, and in production, the stepper servo design will be resumed.

[307startup]

The stepper servo has been sidelined for the moment while we finish up with the cheap drive, the G380V and the G213V. Once those drives are completed, fully tested, and in production, the stepper servo design will be resumed.

Marcus, What's the G213V? What improvements over the G203V are going into this particular drive?

[ger21]

Marcus, What's the G213V? What improvements over the G203V are going into this particular drive?

Step multiplier.

[rceebuilder]

I'm novice about closed loop steppers but today I saw a manufacturer doing this. http://www.fastech.co.kr/English/Ezi-SERVO.html You may find interesting..

Rceebuilder

[derekj308]

Price anyone?

I can't find it on their website.

[ger21]

It's not available yet.

[307startup]

So how much longer will this project be on hiatus?

[raymondg]

Mariss or Marcus,

This is a very interesting product to me. I assume this is the same drive as mentioned in the "stepper servo" thread? Do you have any info on when this might get some priority again?

Thanks,
Raymond

[Mariss Freimanis]

It came off of hiatus Monday. All the new drives are done so I'm back on the step servo. I probably won't have much to say about it until there is something to show.

Mariss