wboyd
USA
Asked
— Edited
Ok...I am trying this again - hopefully someone can help me figure it out...
I have a few of these little stepper motors and was wondering if anyone could shed some light on compatibility with the 2.5 amp motor controller...or any other controller. Here is the data sheet;
http://www.nmbtc.com/pm-step-motors/engineering/pdf/Drive-Circuitry-and-Wiring.pdf
The motors are Pm355-048-snc9 versions - they are housed in an older polycom/sony pan/tilt camera mount. I was hoping that I might be able to use a single h-bridge to control them, but I am thinking thinking that I might need two h-bridges (if that is possible on one EZ-B board)- one for pan and one for tilt.
Please help me figure this out....I am stumped!
Thanks, Wayne
Yes, this is awesome
Just to let everyone know...my little experiment was a success! But...and there is a caveat here - the motors that I was working with are 24v, and drained the power supply fairly quick. So, I am going to try and mod the pan/tilt unit on the sony/polycom unit to use some continuous rotation servos and reduction gears. I am sure that there are better stepper motor controllers for this particular application, but I was able to cobble things together...and it was super cool looking while it had power!
Thanks to all,
Wayne
I posted about this subject a couple of days ago also. My project will be using an linear actuating stepper motor. (screw through middle of motor). I will be using a "chopper" drive that will then require pulses be sent to it. I am waiting on the ezb4 to see if there is some way of generating pulses. The only other input the drive needs is "direction", in my case up or down. I'm really hoping to get some things together soon so I can start posting some pics. I am creating a large "bot". Wheelchair motors for the tracks, wheelchair motors for the shoulder joints,2 orion H bridges 1 for the shoulders 1 for the tracks. And a linear stepper to raise and lower the main body from the track base approximately 12 inches. Cant wait for the ezb4.
I know this is an old subject but I am trying anew... On my Sainsmart L293d motor shield I have figured out how to connect it to the motor - how to connect to the EZB V4? There are two 3pin connectors called servo 1 and 2 - maybe there? But where on the EZB?
No, the servo connectors are cor driving two servos from an Arduino. Being an arduino shield, it is controlled through some number of the gpio pins (the long row of pins labeled 0 - 14) but which ones, and what signal they need you'll either need to find a data sheet or interpret an arduino sketch that is written for it to figure out what it is doing.
Also, at only 600ma per channel, this is not going to drive very powerful motors.
You need to match your controller to your motors, and steppers are not plug and play. You will need to do some scripting to make them work with most (all?) h-bridges.
Alan
Very interesting - the board was very inexpensive and suggested when I bought the stepper motor. The motor is a Kollmorgen P22NRXB so I will have to do more study of motor controller boards. I am building a telescoping arm with a rack and pinion andxas thinking that driving the pinion with a stepper motor would be a simple command like clockwise 4000 counts.
Any recommendation on this telescopic control? Thank you!
Check Jeremie's answer on the previous page of this thread. Describes how to use the ln298 with steppers (2.5 amp, which I think is a good choice for your motors - didn't read the spec sheet, just a description, but I think they are 2 amp).
Alan
Thank you! I have read Jeremie's thread on this and am motivated. Unfortunately, his link to myrobotlab doesn't work. I will order the l298 board but in the mean time where do I connect it to the EZB ?
Is there anyway to contact Jeremie for more specifics on how he did this?