Re: Bed Auto Leveling.. check this out November 12, 2013 05:09PM |
Registered: 10 years ago Posts: 24 |
Re: Bed Auto Leveling.. check this out November 12, 2013 08:16PM |
Registered: 11 years ago Posts: 791 |
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RicardoGA
regpye let me know if you have a problem, i leave you my configuration and configuration adv files, i´m using 2 pololu to drive my z axis
Re: Bed Auto Leveling.. check this out November 12, 2013 09:11PM |
Registered: 10 years ago Posts: 24 |
Re: Bed Auto Leveling.. check this out November 13, 2013 04:59AM |
Registered: 10 years ago Posts: 10 |
static void do_blocking_move_to(float x, float y, float z) { float oldFeedRate = feedrate; feedrate = homing_feedrate[Z_AXIS]; current_position[Z_AXIS] = z; plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], feedrate/60, active_extruder); st_synchronize(); feedrate = XY_TRAVEL_SPEED; current_position[X_AXIS] = x; current_position[Y_AXIS] = y; plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], feedrate/60, active_extruder); st_synchronize(); feedrate = oldFeedRate; }
Re: Bed Auto Leveling.. check this out November 13, 2013 06:03PM |
Registered: 11 years ago Posts: 791 |
Re: Bed Auto Leveling.. check this out November 13, 2013 06:25PM |
Registered: 10 years ago Posts: 10 |
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regpye
I have changed the settings to be very small for the Z axis, and it is working fine now.
Next step is to print new mounts for the hotend cooling fan and also the servo and swap their positions so that the servo will be able to reach the bed while homing. It was silly of me not to have seen that when I first designed the mount.
I guess I will then have to re-calculate all the positions again.
Anyway, on a test without changing the positions, the motors are working fine now and the auto leveling seems to be working too, as I see the z motors turning as the XY movements being done.
Re: Bed Auto Leveling.. check this out November 13, 2013 09:34PM |
Registered: 10 years ago Posts: 1,433 |
Re: Bed Auto Leveling.. check this out November 14, 2013 03:12AM |
Registered: 11 years ago Posts: 791 |
Re: Bed Auto Leveling.. check this out November 14, 2013 05:26PM |
Registered: 10 years ago Posts: 10 |
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uncle_bob
The bed leveling can only do so much. If your bed is not stable through the length of the print, it's not going to fix all your Z axis issues. There are a lot of things (like filament feed) that can throw things off during a print ...
Re: Bed Auto Leveling.. check this out November 14, 2013 06:38PM |
Registered: 10 years ago Posts: 1,433 |
Re: Bed Auto Leveling.. check this out November 14, 2013 07:14PM |
Registered: 11 years ago Posts: 791 |
Re: Bed Auto Leveling.. check this out November 14, 2013 07:21PM |
Registered: 11 years ago Posts: 791 |
Quote
uncle_bob
The micro switch *should* be very consistent if the speed is fairly slow. It's a millisecond action / milliseconds bounce sort of gizmo.
If you use the plastic tube, it can wear out. You also don't want to much or to little plastic between the motor and the thread rod. You need an air gap, but not much of one. How much is that ... I don't know ... looks like about a mm or so.
Re: Bed Auto Leveling.. check this out November 14, 2013 07:40PM |
Registered: 10 years ago Posts: 1,433 |
Re: Bed Auto Leveling.. check this out November 14, 2013 08:24PM |
Registered: 11 years ago Posts: 791 |
Quote
uncle_bob
If the end of the thread rod makes contact with the top of the motor shaft as it rocks back and forth you have a really bad situation. You loose all isolation when that happens. With the plastic tube you need enough tube to allow for some flex as well. Depending on the design of the coupler you could have very similar issues.
Re: Bed Auto Leveling.. check this out November 15, 2013 02:53PM |
Registered: 12 years ago Posts: 329 |
Re: Bed Auto Leveling.. check this out November 15, 2013 04:11PM |
Registered: 10 years ago Posts: 10 |
Re: Bed Auto Leveling.. check this out November 15, 2013 09:11PM |
Registered: 11 years ago Posts: 791 |
Re: Bed Auto Leveling.. check this out November 16, 2013 01:06PM |
Registered: 10 years ago Posts: 10 |
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regpye
I have tried changing the locations in the setup, but have not been successful in getting it right.
Can anyone assist with this small issue?
Thanks
Re: Bed Auto Leveling.. check this out November 16, 2013 02:20PM |
Registered: 10 years ago Posts: 10 |
Re: Bed Auto Leveling.. check this out November 17, 2013 10:40AM |
Registered: 10 years ago Posts: 12 |
Re: Bed Auto Leveling.. check this out November 17, 2013 08:26PM |
Registered: 11 years ago Posts: 791 |
Quote
danlyc
Alex,
Do you still want to perform the "semi auto" EEPROM test?
I am ok if you need help.
Cheers
Daniel
Re: Bed Auto Leveling.. check this out November 19, 2013 12:54PM |
Registered: 10 years ago Posts: 10 |
Re: Bed Auto Leveling.. check this out November 20, 2013 02:37PM |
Registered: 12 years ago Posts: 329 |
Re: Bed Auto Leveling.. check this out November 21, 2013 01:10PM |
Registered: 10 years ago Posts: 1,433 |
Re: Bed Auto Leveling.. check this out November 21, 2013 04:25PM |
Registered: 11 years ago Posts: 791 |
Quote
uncle_bob
If you talk to the airplane guys (they use a lot of servos) not all servos are created equal. The term 9 gram servo covers a vast range of parts that don't have the same interface / size / footprint / torque / range / .... We probably need to get a bit more specific on which servos are working well and which ones are best avoided.
Re: Bed Auto Leveling.. check this out November 21, 2013 05:06PM |
Registered: 10 years ago Posts: 1,433 |
Re: Bed Auto Leveling.. check this out November 21, 2013 06:31PM |
Registered: 11 years ago Posts: 791 |
Quote
uncle_bob
Any idea how much current the servo pulls? I'd guess the answer at rest is "next to nothing". It's the curent while the arm is swinging that I'm wondering about.
Re: Bed Auto Leveling.. check this out November 21, 2013 09:17PM |
Registered: 10 years ago Posts: 1,433 |
Re: Bed Auto Leveling.. check this out November 21, 2013 09:25PM |
Registered: 11 years ago Posts: 791 |
Quote
uncle_bob
Like most servo information, it's not really very detailed. That's not a knock on this specific one, none of them seem to be spec'd out the way a NEMA-17 stepper would be.
My concern is that you only have a limited amount of current available from the Mega regulator. If one has their +12 running ummm .... errrrr... a bit high, it's a bit more of a concern. On the other hand, if the servo pulls < 10 ma no matter what, I'll live with it. Yes I could tack in a 7805 or a 3A switcher or something else. I'd prefer to avoid even more wires going here and there.
Re: Bed Auto Leveling.. check this out November 21, 2013 09:30PM |
Registered: 10 years ago Posts: 10 |
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regpye
Quote
uncle_bob
Like most servo information, it's not really very detailed. That's not a knock on this specific one, none of them seem to be spec'd out the way a NEMA-17 stepper would be.
My concern is that you only have a limited amount of current available from the Mega regulator. If one has their +12 running ummm .... errrrr... a bit high, it's a bit more of a concern. On the other hand, if the servo pulls < 10 ma no matter what, I'll live with it. Yes I could tack in a 7805 or a 3A switcher or something else. I'd prefer to avoid even more wires going here and there.
I am using a 7805 to supply the power. Very simple to connect, just two legs go into the power in plug on the Ardiuno and the third leg (5 volt out) goes to the 5V servo pin on the RAMPS board. Very neat and easy to do, just one short wire.
Cost of a 7805 is under $1