28X2 performance
- Thread starter gavina
- Start date
we need a fair amount more info here, perhaps a schematic and some code other wise its a question of how long is a piece a string.
it maybe down to the fact that the default clock of the 28x2-5 is 4mhx and the 28x2 has default of 8mhz.
setfreq m8 in the older picaxe and see if that makes a difference.
it maybe down to the fact that the default clock of the 28x2-5 is 4mhx and the 28x2 has default of 8mhz.
setfreq m8 in the older picaxe and see if that makes a difference.
westaust55
Moderator
Older X2 parts can only operate at up to 8 MHz with the internal resonator and 20/40 MHz with an external resonator.
The Current/newer X2 parts can only operate at up to 16 MHz (except 20X2 up to 64 MHz) with the internal resonator . The 28/40X2 parts operate up to 64 MHz when used with an external resonator.
The Current/newer X2 parts can only operate at up to 16 MHz (except 20X2 up to 64 MHz) with the internal resonator . The 28/40X2 parts operate up to 64 MHz when used with an external resonator.
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I would not beat yourself up to much, we have all done it.Thank you all.
Silly me - trying to run stepper at setfreq=16MHz. Should have known that 28X2-5V max internal operating freq is 8MHz hence the half speed.
Althought if your changing the operating frequency of the PICAXE (with SETFREQ) then if things done work as expected, I know where I would look ...............................