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FAQs / Mach3 setting and configuration (newbie question level )
« on: June 02, 2011, 10:43:58 PM »
Hello,
I have installed the version R3.043.022) of mach3. I have two questions:
1) Imagine that I am starting in 0,0,0 when I execute a G00 X100 for example command the speed is the one defined in Config>Motor tuning, this is a fast move to go to position(at least from what I remember from school)
now if I want to go back to o,o,o but with a cutting speed I will input something like G01 X00 now the machine is going to a predetermined cutting speed. Where is that value defined? it is not the same than the G00 but I do not see where the ratio is defined....
2) I am also doing something wrong when I of calculate the number of steps/rotation for 1mm...
here is what I have:
the axis is driven through a belt the pitch (not sure of the word in English) is of 0.08" meaning that for 100teeth represent 8". my pulley has 20 teeth and my motor 200steps/rotation so here is how I calculate:
20 teeth represent 1/5 of 100 as a result every turn of pulley i advance of 8/5=1.6" being french I work in mm so 1.6*25.4=40.64mm/turn
so for 1mm I have to do 1turn/40.64=0.0246mm/turn I multiply that by the number of steps of my step motor (*200) and I find: 4.92
so I have to set mach 3 at 4.92 step for 1mm (rounded to 5 step/mm)
Now when I do that I am way off and I am much closer if I input 10step/mm (double what I calculated...) :-( sure I am doing something wrong but Right now (and for a few hours now) I do not see where I screw up my calculation...
Any help would be really appreciated.
Regards
AB
I have installed the version R3.043.022) of mach3. I have two questions:
1) Imagine that I am starting in 0,0,0 when I execute a G00 X100 for example command the speed is the one defined in Config>Motor tuning, this is a fast move to go to position(at least from what I remember from school)
now if I want to go back to o,o,o but with a cutting speed I will input something like G01 X00 now the machine is going to a predetermined cutting speed. Where is that value defined? it is not the same than the G00 but I do not see where the ratio is defined....
2) I am also doing something wrong when I of calculate the number of steps/rotation for 1mm...
here is what I have:
the axis is driven through a belt the pitch (not sure of the word in English) is of 0.08" meaning that for 100teeth represent 8". my pulley has 20 teeth and my motor 200steps/rotation so here is how I calculate:
20 teeth represent 1/5 of 100 as a result every turn of pulley i advance of 8/5=1.6" being french I work in mm so 1.6*25.4=40.64mm/turn
so for 1mm I have to do 1turn/40.64=0.0246mm/turn I multiply that by the number of steps of my step motor (*200) and I find: 4.92
so I have to set mach 3 at 4.92 step for 1mm (rounded to 5 step/mm)
Now when I do that I am way off and I am much closer if I input 10step/mm (double what I calculated...) :-( sure I am doing something wrong but Right now (and for a few hours now) I do not see where I screw up my calculation...
Any help would be really appreciated.
Regards
AB