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Messages - mvcorrea

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1
General Mach Discussion / Re: slave axis aleatory movement
« on: August 18, 2015, 10:37:47 PM »
Davek0974, fabhund, thanks for your help.

The problem: X+A axis in slave mode X works OK A works in aleatory directions.

The conclusion. I have a failing stepper motor.
First I swapped X and A and the problem stays in that motor(could only be the cable or stepper).
Reused Z axis in A and everything started working properly.
I let the controller(ebay TB6600 4 axis) to be in 1/16 uStepping and used this configurations in motor tuning (for reference).

Steps per: 80
velocity: 9000mm/min -> 150mm/s
acceleration: tweaked to let around 0.015G
let step: 5 and dir: 0 as it was previously.



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reinstalled mach3 and everything worked properly (for reference).

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General Mach Discussion / Re: slave axis aleatory movement
« on: August 16, 2015, 11:12:50 AM »
Hi Guys,

Thanks again.

I will try tomorrow, and post the results here.

I will configure the board to 1/16 uStepping, using 80 in "steps per"(prusa calculator) field, keep velocity to 150 mm/s, acc to 0.05G and test DIR PULSE timming to 0 thru 5.

and also with previous configuration keeping velocity and changing acc to 0.015G (10% velocity)

Searching for https://www.google.com/search?q=mach3+motor+tuning&tbm=isch&tbo=u&source=univ&sa=X We are able to see a wide range of values in acc...

I am right now reading more about the Step/Dir pulse, and almost all reading goes to the delay associated to the optocouplers when switching.

Those settings could also be associated with wire length differences when, for example in slave mode?

1-2 meters difference between X/A could produce the previous effect?

regards,

4
General Mach Discussion / Re: slave axis aleatory movement
« on: August 15, 2015, 10:49:27 PM »
Hi Dave,

Thanks for your answer,
yes, both motors are identical, and configuration looks the same..(attached are the x+a axis configuration)


I used this manual to configure it http://www.omc-stepperonline.com/download/pdf/4_Axis_TB6600_CNC_Driver_Board_Users_Manual.pdf
and to get values I used this http://prusaprinters.org/calculator/ 1.8 step angle, 1/2 uStepping, belt 2mm gt2 and 20 pulley tooth count (gives me the value 10)
9000 mm/min -> 150mm/s for max speed and 3000 mm/sec^2 as acceleration could be a little fast I really dont know (1/3G)??
I am using nema 23 motors 2.6A configures in the controller. the machine is a shapeoko alike.

Any help/suggestion is appretiated

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General Mach Discussion / slave axis aleatory movement
« on: August 14, 2015, 05:47:48 AM »
Hi Guys a newbie question!?

Mach3 in windows XP, X+A axis together in (config->slave axis).
When using arrow keys they are responsive but, one of the axis run OK, the other goes aleatory in both directions.
And in MPG mode when adjusting "slow jog rate" less than 50% the motor in case just shake..


Anyone could help me in this situation, please?

regards,
Marcelo

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Hi There, First Post, extremely new regardind CNC

The situation, mach3 installed on XP, driver ok on device manager, getPortAddress app says LPT1 h378, DriverTest app runs OK.

Installed on the internal port configured as ECP.

I have this Chinese 4 axis TB6600 controller.



Tried to move stepper(G0 X20 Y20 Z20) on any port without success (A port supposed to be slaved to X).

Already search for answers in the forum but all partial..

Not yet measured voltage on port pins!

Can Anyone help me in this situation please :)

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