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thh
thh
Visitor II
September 15, 2014
Question

Implementing motion profile multiple L6470 chips

  • September 15, 2014
  • 1 reply
  • 601 views
Posted on September 15, 2014 at 16:23

I'm investigating using the L6470 for an multi-axis application. Please let me now if it is possible using SPI to position multiple motors according to a motion profile/position table at constant speed. i.e. implementing G-code control

#l6470
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1 reply

larken
larken
Associate II
September 20, 2014
Posted on September 20, 2014 at 22:47

Probably not up to the task. To do 2 or 3 axis interpolation you need to do it in a front end program to calculate pulse distribution  and velocity smoothly, such as the bregenhams algorithm .  Mach3 used a fixed speed 'conveyer belt' (fifo) that he drops step pulses on a certain distance apart. The trajectory is all preplanned .

 The only thing you could do with SPI is maybe point to point drilling.

Larry

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