In SX Microcontrollers, SX/B Compiler and SX-Key Tool, babinda01 wrote:

Hi Polywogs.

I have been thinking of making a serial CNC controller for some time, but time always seems to get in the way of things. 

I have a couple of questions, (please excuse any dumb ones as I have never worked with the SX chip before).  I would like to make a control that is suitable for plasma or flame cutting steel.  I would need to be able to cut at much higher speeds - in the 6000 to 10000mm per minute range.  I would output standard step & direction pulses so that I could use external servo amps.

 So I guess my first question is; what is the limiting factor in regard to speed???  What do I need to look at to increase the step rates???

Would there be any advantage to using multiple SX chips ie. one for processing/parsing the serial input from the pc and then one for each axis to generate the steps. If I went this way how could I coordinate the multiple chips for interpolated moves, either linear or circular??

Have you played with the Propellor chip? Would they be a better device for this project???

Thanks for your help

 

Regards

Andrew

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