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Messages - luckym

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1
General Mach Discussion / CV for 4 linear axis
« on: December 23, 2012, 05:07:23 AM »
Hello,
How mach compute constant velocity for 4 linear axis machine? I have 4 axis foam cutter. I selected X Y for the left side and A B axis (switched to linear) for right side. Do I need to set something to tell mach this are 2 pair of axis?
How mach treats this: 2 linear segments. on the XY side they make 90 deg. corner and on on the AB side they are almost coliner. Next the same but 90 deg corner on AB side and colinear on XY side.Will these situacions mach treat equally? Considering "Stop CV on angles", "CV dist tolerance" parameters. How it knows between which pair of axes compute angle? e.g. between A,B and XY and not YA ?

thanks
michal

2
Thanks for reply......
Yes I know about this site....
I tested the drivers but they don't work with Mach3 properly (they require much more time for setting the dir signal before step signal)
So I've chosen another driver.

3
General Mach Discussion / Re: dir pulse length
« on: March 12, 2007, 11:29:42 AM »
I've tried to change the value and look at the signal with oscilloscope. But nothing happens. There is some time before step pulse (20us) is it possible to change it?

4
General Mach Discussion / dir pulse length
« on: March 09, 2007, 01:23:41 PM »
Hello.
What does dir pulse mean  in the motor tunning setting? Is it time between dir output change and step impulse?
thanks for reply
michal

5
Hello.
I want to buy the drive for stepping motors. I've selected this one from www.rta.it SDC 06.
but there is in the datasheet:
Step input: Suggested duty cycle 50%, max frq. 60kHz.
Dir input: This signal has to be valid at least 100us before step signal and has to stay in this state for at least 100us after last step sent to the drive
Is it possible to use this drive with mach3? There is just pulse length in the mach3 setting.
thanks for help.
michal


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