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[on:]

hello i new in this
I want to control about 15 - steppers motors with Controller Arduino
I need to have the ability to run all the motors separately and together, and to varying degrees
do i need to use several ardoaino controller?
how many steppers motors can i use with arduino?

[Reply #1 on:]

This device (L6470) may help:

https://www.sparkfun.com/products/10859

It runs the stepper autonomously once you send it a command. You would need a chip select for each one. You may be pushing it with a single Arduino, but maybe just. Depends what else you are planning to connect to it. You could use a 16-port port-expander for the chip selects.

[Reply #2 on:]

Cool chip!  I wonder how the stall detection works?  Do you know?  That is something I have written into my library.

[Reply #3 on:]

The documentation says:

Sensorless stall detection

Depending on motor speed and load angle characteristics, L6470 offers a motor stall condition detection using a programmable current comparator.
When a stall event occurs, the respective flag (STEP_LOSS_A or STEP_LOSS_B) is forced low until a GetStaus command or a system reset occurs (see paragraph 9.2.20).

[Reply #4 on:]

I´ve been working with the L6470 Chip.. https://www.sparkfun.com/products/10859 so I have a couple of questions..so hope that you could help me.. First all worked preatty good. I was able to running with very good and fast with velocity values( 6000 steps/sec). with these motor.. http://www.phidgets.com/products.php?category=23&product_id=3317_0 v Power Supply: 12V 15 amps. My Issue: I tested the chip with this other motor : http://www.mechapro.de/shop/product_info.php?language=en&products_id=182 and now the motor runs Max in 1000 steps/second.. .very slow .I configured the CONFIG register with the default values. KVAL RUN,ETC ETC. also i wrote it other values but I d�nt see other behaivor.. The other problem and I cann not drive so fast the other motor(Phidgets) again.... Could you say me your experience or a litte trick..  What Kind of motor could i drive.. Thanks..,
Best Regards..
Edy

[Reply #5 on:]

I had similar results. One motor worked better than another one. I don't have any tricks yet, except working on the configuration some more.