Roman Black - Aug 2002 This design is Hippyware
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PCB and full kit of parts to build your own!
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Also available: Set of 3 boards for $35.00. These are VERY well made boards and are certainly worth the price IF you have a well stocked scrap box to populate them. With the kit of parts only $25 each quantity 3, I don't think you will ever find the parts for less from another vendor
* UNIPOLAR motors only (needs a 5,6 or 8 wire motor) * 200 step - full step * 400 step - high-torque half step * 1200 step - microstep 6th! * 3600 step - microstep 18th! * Best suited for up to 1.5A /phase motors * (Up to 2.5A/phase with some changes) * 72mm x 50mm board size * PSU voltage 4v to 35v * low power "hold" mode * constant current linear unipolar * rugged 5A 100v transistors * stepless operation, linear current smoothing * on-board PIC chip + free source code * "standard" step + direction inputs * requires motor voltage and regulated +5v Basically this is just a board I designed for my own use, that ended up as a kit. It is easy to build and is well suited for motors around 1A/phase. It can be re-configured to do larger motors with some resistor changes and a large enough heatsink. I like things rugged and simple, which it is. Yes it is linear and makes heat (like a big audio amp does). It has some unconventional features like hardware AND software microstepping, and current ramping to give almost "stepless" operation at the tuned speed. And it will suit industrial apps with continuous use etc, no "toy" stepper chips in this design. 3600 steps per revolution with a 200 step motor! My original design goal was to make a board that could be used for many different projects. If you choose you can modify this design to suit different tasks. Circuit operation is simple and easy to understand and test and PIC .asm source code is supplied. Full indexing, motion control etc on one circuit board is possible if you wish to reprogram it. Almost stepless operation... The board can be "tuned" for a specific speed band, and steps are smoother through ALL rev ranges with the inbuilt step ramping. How the board works (long). Instructions! As this is a kit of parts, here is a page on: How to build it High-Torque half-stepping! I use a little known form of half- stepping as one of the main modes. More about the special half-step system: High-Torque half stepping Circuit Diagram click here. PCB (Board) Layout click here. PIC Software click here to READ it. PIC Software click here to DOWNLOAD it as a ZIP file.Using the board! Tips for using the board and keeping it cool. How to tune the board for currents other than 1A. Tuning the board for different sized motors requires changing the 2 sense resistors, this page also covers software mods. More info here. Picture of the linistepper driving a 5v 1A motor. The other circuit board is a 555 timer and some dip switches, that clocks the STEP input and can switch the DIRECTION and LOW POWER inputs and change the stepping mode between 200, 400, 1200, 3600 steps/rev. The heatsink shown looks large as my camera has a slight "fish-eye" lens. -end
Feedback:
Questions:
How do you hook the motor to the Linistepper board?
Does M+ connect to one end of each phase, or do you connect the center tap to the M+ terminal?
thanks
James
Hi, with most common 5-wire unipolar motors;
With 6-wire unipolar motors;
Very informative and interesting! I have one question regarding the kit for the Linistepper: the PIC chip is programmed already, isn't it? How to go about tools/info on programming these chips? Stan
Thank you! The PIC is pre-programmed. You can find information about PIC
device programmers at the PIC programmer
page
Hi, I'm a newbe and would like to know what it would take to drive the stepper motor board directly from the printer port--as in, does the software posted here do the trick directly, or do I need to figure out how to make calls to the printer port?Thanks for your time--it's very much appreciated!
You are very welcome! The linistep software is for the PIC on the actual
controler board. Computer Numerical Control software for your PC will send
signals to the parallel port to activate the controllers. See our
CNC page for some options.
The hardware connection is easy, just make sure
the linistepper and the PC share a common 0v (gnd) and then connect the parallel
port to the lini input pins. The resistors are already on the lini
board.
Port Pin Motor Signal ----- ----- --------- D0 1 Step D1 1 Direction D2 2 Step D3 2 Direction D4 3 Step D5 3 Direction D6 4 Step D7 4 Direction
Actually, most of the software available for PC's will specify which Port
Pin is to be used for what, or will allow you to specify in the software
how you have connected the signals.
Comments:
Hello,Recieved your kit today (saturdaymorning 9 Nov.) Thank you Verry Much!
Looks verry Proffesional made!
I do not have the time at the moment to build an test it and i dont have the alluminium heatsink at homei have placed the components on the board all fits well i think except C3 holes are 2,54mm wide and should be 5,08mm wide {Ed: Component changes caused that... The leads can be bent to fit for now}
also it would be better to place picture off the caps position on your kitassemble page people look better than they read or place caps + - on the silkscreen off the board {Ed: Done!}
maybe you could give some more info/pictures about the resistors and colors on your kit assemble page maybe a picture with lines outside the picture with describing text off resistors (colors) {Ed: Will do!}
think this could help other people making mistakes placing components
verry nice kit
question where do you get this good quality pcb board made?? {Ed: GRIN!}
greetings luberth
netherlands