DC motor drive for small motors

[InraRed]

Hi all,

I'm new to motion control ( but not to electronics). Currently rebuilding old SEM with failed motion control. My plan is to use some PCI-7354 or PCI-7358 bords to control about 10 DC motors on it. It is still not clear what kind of drive I need? The proposed MID series looks too big and expensive. I'm not sure if I really need it.

My motors vary from 5-to 12V and current maight be up to 1A max.

 All they are FaulHabber minimotors with encoders.

One example is this http://www.faulhaber-group.com/uploadpk/EN_1016G_MIN.pdf

Encoder: http://www.faulhaber-group.com/uploadpk/EN_30B_MME.pdf

Others slightly bigger but similar.

The speed control for me is not critical at all but the final exact positions is most important.

Can anybody suggest what can be used to drive such motors with  PCI-7354 or PCI-7358 .

I see there is a lot of "single chip" motor drivers arround from semicondurtor stores. Can they be used to bulid my own simple dirve?

Any links? What is best?

[Jochen]

Hi InraRed,

you might find some useful tips on the Motion Advisor pages at ni.com, but the list for brushed DC motor drives is pretty short, so I don't know, if you can find a product there that meets your needs. I have gathered some good experience with Maxon drives like the DEC 70/10.

In general you should watch out for drives that provide an analog command input (e. g. +/- 10 V or +/- 5 V). The drive should support torque (current) control, as this is the best fit for 73xx boards.

I hope that helps,

Jochen Klier

National Instruments