I can not move manually the motor in CW but the printer works, why?

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torla91
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I can not move manually the motor in CW but the printer works, why?

Postby torla91 » Tue Feb 23, 2016 7:28 pm

hi folks, i would like to move the motor of the Z axis through the CW tool for homing the build plate, but unfortunately nothing works, i can not figure out why, in fact my 3d printer is working almost good, the commands sent by a clik are not executed by the motor!
WHY?!?!?!?!
thank you in advance.

nc42
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Re: I can not move manually the motor in CW but the printer works, why?

Postby nc42 » Wed Feb 24, 2016 4:35 am

Couple if things:

First couple are a bit obvious but make sure you've hit the connect button... Then in the control screen motors are turned on.

After that the biggest thing I can think of is on my machine the platform will only move up until I home the z axis to the limit switch at the top

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torla91
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Re: I can not move manually the motor in CW but the printer works, why?

Postby torla91 » Wed Feb 24, 2016 10:09 am

Yes, connecting the machine the motor moves but it not do only 10mm but it start moving without stopping. Another problem is tha during the preinting the built plate does not move 5mm as i choosed and set in the arduino code, it moves down 1mm independently by my settings. I really dont know where modify my system.

nc42
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Re: I can not move manually the motor in CW but the printer works, why?

Postby nc42 » Wed Feb 24, 2016 11:25 am

What electronics (board and stepper drivers) and what firmware?

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torla91
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Re: I can not move manually the motor in CW but the printer works, why?

Postby torla91 » Wed Feb 24, 2016 1:59 pm

I'm using an arduino uno board loaded with this firmware http://projectsinterestsandetcetera.com/3d-printer-rebuild-software-and-electronics/, driving a A4988 stepper driver https://www.pololu.com/product/1182. The torque is transmitted with a trapezoidal screw with a thread 10x3 DX.
At the moment the configuration used is stepper motor(1.8deg/step, 200 step/turn, 1/16th step drive).
To move the plate of 1cm i need 4.25 turns of the screw, that means: NScrewTurns X Step/turn X stepRes = 4.25x200x16 = 13600 steps.
This means that i need 13600 steps to move of 1cm, my layer is 0.1mm so my layer is 136 steps deep.
For what concern the plate movement i want a 5mm movement that translated in therms of step is: 13600/2 = 6800 steps.

In the arduino firmware i have set :

Code: Select all

int PlatenStepsPerLayer = 136;
int StepsToRaiseLowerBuildPlate = 6800;
 


Now i think that all the parameters are correctly setted up. Please help me because at the moment the printer is useless.

nc42
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Re: I can not move manually the motor in CW but the printer works, why?

Postby nc42 » Thu Feb 25, 2016 3:45 am

if your screw is a 10x3 it should move 3mm for every rotation or 3.33 revs per 1cm.

I'm not familiar with using that firmware. You might look at changing to marlin or which can be setup pretty easily then you will be able to set layer heights and lift parameters in CW and not have to change your firmware to do so.

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torla91
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Re: I can not move manually the motor in CW but the printer works, why?

Postby torla91 » Fri Feb 26, 2016 11:38 am

ok, now i will lokk how to move to another sw. does Marlin requires a particular hardware? i have an arduino and some custom electronics so i prefer to mantain my boards.

nc42
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Re: I can not move manually the motor in CW but the printer works, why?

Postby nc42 » Fri Feb 26, 2016 4:22 pm

Marlin works on arduino. You can choose from one of the preset 3d printing boards then match the pins for your stepper driver to that.

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torla91
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Re: I can not move manually the motor in CW but the printer works, why?

Postby torla91 » Fri Feb 26, 2016 5:05 pm

And what about creation workshop + GRBL?? I prefear GRBL because i can also use the board to drive a hipotetyc CNC or 3 axis system.
Do you think that i have to do some modifications to CW to make a correct connection with GRBL.??

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torla91
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Re: I can not move manually the motor in CW but the printer works, why?

Postby torla91 » Wed Mar 02, 2016 8:04 am

[SOLVED] i flashed my arduino with GRBL and now CW is working completely! thanks for the support.