[kreutz]

Here is the document.

Kreutz.

[kreutz]

Ediestel's new PCBs.

[kreutz]

About the future Mardus-Kreutz II Unipolar Micro-stepper stand alone drives (M-K II).

• Will be stand alone on only one board.
• Will be based on a micro-controller and a CPLD (preferable on socket)
• Will include ENABLE input and Fault Output.
• Will still be rated 80V 8 Amps drive with modes: Full, half, 1/4, 1/8, 1/16, 1/5 and 1/10.
• The PCB will be smaller in size.
• Will be a DIY board with SMD components (size 0805 for easier handling).
• Will also be optionally sold completely assembled.

The micro-controller and CPLD will be sold already programmed and really cheap, including the bare PCBs, target price to be determined yet.

[ediestel]

Hi all,


14 Mardus Kreutz PCB - industrial quality - are available at cost. I ordered 25 and this is what is left at this point.

A set of 3 PCB will be $ 50 including flat rate shipping. Payment with paypal.

ed

[kreutz]

About the future Mardus-Kreutz II Unipolar Micro-stepper stand alone drives (M-K II).

• Will be stand alone on only one board.
• Will be based on a micro-controller and a CPLD (preferable on socket)
• Will include ENABLE input and Fault Output.
• Will still be rated 80V 8 Amps drive with modes: Full, half, 1/4, 1/8, 1/16, 1/5 and 1/10.
• The PCB will be smaller in size.
• Will be a DIY board with SMD components (size 0805 for easier handling).
• Will also be optionally sold completely assembled.

The micro-controller and CPLD will be sold already programmed and really cheap, as well as the bare PCBs, target price to be determined yet.

Forgot to say that it will have the same functionality as the K-4 power boards (except the decay control, which is not an option for unipolar drives), while keeping the power handling and ruggedness of the M-K boards.

[kreutz]

FYI

The previously posted schematics have an error. Here are the corrected schematics.

[kreutz]

Here is the video. Enjoy!!

Kreutz.

[ame="http://www.youtube.com/watch?v=U0BDdWLkL8M"]YouTube - Kreutz-4 PC Interface with Mardus-Kreutz Unipolar Micro-Stepper Boards[/ame]

[aladin]

hello Kreutz !

Great work this video show will all the system and the performance.
what about if needed dual motors to x axis for heavy machine ?
its need to dual motor driver ?
have you dual motors Drivers ?

thanks
aladin

[kreutz]

hello Kreutz !

Great work this video show will all the system and the performance.
what about if needed dual motors to x axis for heavy machine ?
its need to dual motor driver ?
have you dual motors Drivers ?

thanks
aladin

Hello Aladin;

The machine on the video is already a heavy machine, it is able to drive the y-z bridge with a 165 lb person standing on top, the x axis linear rails are mounted on independent granite blocks held by the frame which is made with heavy gauge 3 steel (including Y-Z bridge).

For heavier machines the 4th axis of the K-4 interface could be enslaved to any of the other axes in Mach3, if it is not being used.

I posted a multi dual axis interface schematics a while back, for those who have really heavy machines.

Regards,

Kreutz.

[nhatson.elec]

SLA or any one have low vol, low current. and not flexible to design

[kreutz]

SLA or any one have low vol, low current. and not flexible to design

???????
Can you, please, explain?

Kreutz.

[nhatson.elec]

???????
Can you, please, explain?

Kreutz.

Sory about my english

About SLA chip like SLA7026, A3977 , it run at low voltgle, Don't have auto reduce current and more .

Step driver use MCU or FPGA is flexible desgin

[kreutz]

Sory about my english

About SLA chip like SLA7026, A3977 , it run at low voltgle, Don't have auto reduce current and more .

Step driver use MCU or FPGA is flexible desgin

No problem, we understand each other pretty well (English is not my mother's language either). There is a thread about them in the CNCzone, they are not only inflexible, but also have some limitations. Some of the cheap solutions around are based on those chips. My idea was to develop a better quality solution with customization and upgrading in mind.

Best regards,

Kreutz.

[nhatson.elec]

To kreutz

I was saw MK unipolar microstep and K4 board, It is great for hobby use.

Best Regards

[nhatson.elec]

Thanks Kreutz info. High quality stepper driver need 32bit MCU, or DSP . Use FOC like PMSM control

I have alpha step of vexta ( close loop control) it run very smooth. It use HD643704 ( Hitachi MCU 32bit)

[nhatson.elec]

Hi everybody

How many need spend for on MK unipolar stepper motor driver?

thanks you

Merry Chirsmas and Happy New Year

Best Regards

[kreutz]

Thanks Kreutz info. High quality stepper driver need 32bit MCU, or DSP . Use FOC like PMSM control

I have alpha step of vexta ( close loop control) it run very smooth. It use HD643704 ( Hitachi MCU 32bit)

I have been thinking about Vector Flux Control for a while, the only problem is that a high count ppr encoder would be necessary, and the stepper motor should be paired to the drive.

Most of the people don't have access to an specific model motor, so it will require to have the motors in stock. The price for the drives will increase to be about 60% of the price of the industrial distributors until reaching a manufacturing volume that allows to drop it. Using encoder-less vector flux control will solve part of the problem, but requires a more complex firmware and the need to pair the motor with the drive stays.

Best regards,

Kreutz.

[nhatson.elec]

I have been thinking about Vector Flux Control for a while, the only problem is that a high count ppr encoder would be necessary, and the stepper motor should be paired to the drive.

Most of the people don't have access to an specific model motor, so it will require to have the motors in stock. The price for the drives will increase to be about 60% of the price of the industrial distributors until reaching a manufacturing volume that allows to drop it. Using encoder-less vector flux control will solve part of the problem, but requires a more complex firmware and the need to pair the motor with the drive stays.

Best regards,

Kreutz.

Thanks Kreutz

Alpha step use sub coil is encoder,

http://www.orientalmotor.com/images/.../AS-sensor.jpg

i think it work like in this link

http://www.webx.dk/oz2cpu/20m/encoder.htm

[kreutz]

Thanks Kreutz

Alpha step use sub coil is encoder,

http://www.orientalmotor.com/images/.../AS-sensor.jpg

i think it work like in this link

http://www.webx.dk/oz2cpu/20m/encoder.htm

Using steppers as encoders is good for MPGs or low resolution encoders, but for this application it is required to have high resolution encoders.

Best regards,

Kreutz.

[nhatson.elec]

i was open alpha step stepper motor, it is 2 phase motor ( bipolar) . Feedback like small stepper motor, I was check in PCB, dont have opam in reciver shecmatic. >> it dont work like resolver
But close loop is expensive system