Originally Posted by
joeavaerage
Hi,
Yes you could easily use an auxillary 24VDC supply for other purposes, the ESS for instance. Although an ESS requires 5V, and will not tolerate more than 5V,
at 5.5V its ready to let smoke out. You would need a regualtor to cut the 24V down to 5V, which would be no problem but a linear regulator will get
hot so will require adecent heatsink.
The only potential source of trouble is that the main winding of the transformer will be supplying varying current to your steppers. Any electrical noise
that generates will be on the auxillary winding as well and could potentially invade the ESS. If you want to use the auxillary supply I would use a linear
regulator and pay particular attention to capacitive decoupling. I would insist on low ESR tantalum caps in addition to the samller ceramics caps.
Nothing difficult about it, just you need to dot the i's when using a 7805 reg.
Craig