Re: New Article Posted

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Alan Marconett" <KM6VV@...>
wrote:

>
> Hi,
>
> What's all this "sync" on the halfstep of the SLA7062 chip?
>
> Nothing to do with synchronizing the clocks on multiple stepper ICs

is it?

> I was considering driving all four LMD18245's with a single oscillator.
>
> Alan KM6VV

it is specific to the SLA7062 chip.

from the data sheet;

Synchronous operation mode. This function pre-vents
occasional motor noise during a "hold" state, which
normally results from asynchronous PWM operation of
both motor phases. A logic high at the SYNC input is
synchronous operation; a logic low is asynchronous
operation. The use of synchronous operation during
normal stepping is not recommended because it produces
less motor torque and can cause motor vibration due to
stair-case current.

Dave