My machine is set to to amax. speed of 4800 mm/min (~ 190 inch/min) and
an acceleration of 9600 mm/min.
But somehow, during milling I reach only speeds of up to 600 mm/min when
doing small steps in the program.
The thing is controlled with an older PC I still had standing in a
corner - don't know the exact specs but it is a 1.4 GHz AMD / 786 MB
SDRAM and a simple VGA card using stepper motor control through the
printer port.
The G-code is created using DeskProto an contains a lot of small steps
like this:
> F2000.0 G1 Y26.1111 Z-7.6255
> F2000.0 G1 Y26.3333 Z-7.5962
> F2000.0 G1 Y26.5556 Z-7.5686
> F2000.0 G1 Y26.7778 Z-7.5429
I see three possible causes for the low speed reached during milling
this (larger steps are going faster):
1. the PC is too slow (there is a fairly high CPU load of about 80%
2. the G-code is not optimal: all the "F2000.0 G1" sequences are not
needed and just take up valuable time
3. EMC is deaccelerating after each step before proceeding with the
next one.
Is anyone using DeskProto with these kinds of speeds ?
and what kind of PC and/or DeskProto settings are you using ?
What is the best thing to try first: create a simple C-program to
optimize the G-code or should I just go to the shop for a new PC?
Any suggestions on processor type and/or memory, what is the speed
difference between Core2 Duo and Quad or the newer AMD cores?
I am new to EMC so any help in configuring and building a decent system
is appreciated.
Regards,
Rob
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