<![CDATA[SoliForum - 3D Printing Community — New bed level probe idea]]> 2013-12-05T00:31:48Z PunBB https://www.soliforum.com/topic/4169/new-bed-level-probe-idea/ <![CDATA[Re: New bed level probe idea]]> As Morpheous would say:

Yessss...

]]> https://www.soliforum.com/user/131/ 2013-12-05T00:31:48Z https://www.soliforum.com/post/43286/#p43286 <![CDATA[Re: New bed level probe idea]]> Ok! It sounds to me like you're saying that the back was determined as the reference, and the two servos adjusted with respect to it.

Made me think, if was feasible, how cool it would be to have a detachable continuous rotation servo motor that just turned the screws. Then you'd really be rocking, and at half the price. but it would be much harder to center it.

]]> https://www.soliforum.com/user/192/ 2013-12-05T00:18:32Z https://www.soliforum.com/post/43283/#p43283 <![CDATA[Re: New bed level probe idea]]> Tomek wrote:

Do you mind explaining what he did? I would assume he needs 3 servos to level the bed.

He only used 2 servos.  He had a 3 point manual screw-leveling system (like our SD's); what he did was first home near the single screw location (on SD, the one in the back, no servo attached) and he had a proximity probe that set that reading as "System Zero". 

Then he went to the first of the two other servo-driven screw locations (front) and with the z-table homed to the newly defined System Zero point, whatever the probe detected as the Delta was then used to engage the servo to bring that point to match the System Zero +/-.  He then repeated this for the 3rd position.

I hope the explanation was clear enough...

]]> https://www.soliforum.com/user/131/ 2013-12-04T18:21:58Z https://www.soliforum.com/post/43258/#p43258 <![CDATA[Re: New bed level probe idea]]> Do you mind explaining what he did? I would assume he needs 3 servos to level the bed.

]]> https://www.soliforum.com/user/192/ 2013-12-04T17:35:40Z https://www.soliforum.com/post/43253/#p43253 <![CDATA[Re: New bed level probe idea]]> Tomek wrote:
IronMan wrote:

Seems to me like this guy's got it done!  Truly leveling the bed using only 2 servos...on the SD it would no doubt be the 2 front leveling screws...

http://www.youtube.com/watch?v=Ppx_kGyQorc


Any chance you downloaded that video? Shows up as private for me.

No, I did not...it shows up as private for me now too.  No doubt he took it down for legal reasons...he's probably pursuing a patent!

]]> https://www.soliforum.com/user/131/ 2013-12-04T14:49:26Z https://www.soliforum.com/post/43239/#p43239 <![CDATA[Re: New bed level probe idea]]> IronMan wrote:

Seems to me like this guy's got it done!  Truly leveling the bed using only 2 servos...on the SD it would no doubt be the 2 front leveling screws...

http://www.youtube.com/watch?v=Ppx_kGyQorc


Any chance you downloaded that video? Shows up as private for me.

]]> https://www.soliforum.com/user/192/ 2013-12-04T14:34:19Z https://www.soliforum.com/post/43237/#p43237 <![CDATA[Re: New bed level probe idea]]> what about incorporating strain gauges into the bed
http://morf.lv/modules.php?name=tutorials&lasit=19

http://smdsensors.com/Products/default. … ce+Sensors

]]> https://www.soliforum.com/user/187/ 2013-10-29T09:38:23Z https://www.soliforum.com/post/40203/#p40203 <![CDATA[Re: New bed level probe idea]]> Another idea (don't know how good it is, mind you). I stumbled across this gadget on thingiverse:

http://www.thingiverse.com/thing:44572

What if, instead of merely a spring, you had the pressure sensor above sandwiched between 2 plates with the spring pulling them together.

Not only would you maybe get a less wobbly print head, but you should also be able to notice a sharp change in the resistance as soon as the nozzle makes contact with the bed. With micro stepping on the Z axis, you might even be able to read the level exceedingly accurately.

That's the theory, anyway.

]]> https://www.soliforum.com/user/270/ 2013-10-29T00:25:14Z https://www.soliforum.com/post/40190/#p40190 <![CDATA[Re: New bed level probe idea]]> Heres an idea for a probe switch.
http://www.adafruit.com/products/166?gc … MgodFjgArg

Mount this between the extruder servo/fan and the x carriage.

I just ordered one to try it out. We will see what happens. Now I just have to figure out how to control the servos. Im thinking and I2c servo board? Or do you think I could just use some pins on the Printrboard?

]]> https://www.soliforum.com/user/2761/ 2013-10-22T01:18:09Z https://www.soliforum.com/post/39573/#p39573 <![CDATA[Re: New bed level probe idea]]> Now that I like

]]> https://www.soliforum.com/user/134/ 2013-10-16T17:49:05Z https://www.soliforum.com/post/39112/#p39112 <![CDATA[Re: New bed level probe idea]]> Seems to me like this guy's got it done!  Truly leveling the bed using only 2 servos...on the SD it would no doubt be the 2 front leveling screws...

http://www.youtube.com/watch?v=Ppx_kGyQorc

]]> https://www.soliforum.com/user/131/ 2013-10-15T20:51:31Z https://www.soliforum.com/post/39033/#p39033 <![CDATA[Re: New bed level probe idea]]> For the retractable probe, there would be a probing switch at the end of a lever.  The extruder would move past something like a bolt that would snag the lever and cause it to be pushed down as the extruder moved by, lowing the probing switch into position.  When the probing is done, the extruder would move past the bolt from a different direction that would cause the lever to be pushed back up.  That is the principle used in the video I posted.

Using the nozzle itself to do probing shouldn't be hard on the Solidoodle.  Because the X carriage has a loose hold on the back X rod, the nozzle already can move up and down a little.  If you set the bed to home a little too close, you can see it push up on the nozzle and rock the extruder back.  There should be a way to position a switch at the back of the carriage that will  trigger when the bed pushes up on the nozzle, and a spring that will keep the extruder tilted forward when the bed isn't pushing up on it.

]]> https://www.soliforum.com/user/14/ 2013-10-14T19:04:43Z https://www.soliforum.com/post/38929/#p38929 <![CDATA[Re: New bed level probe idea]]> Do you have a switch idea for a non-delta, non-bowden extruder

I really don't understand your switch
does it close on XY move or Z move?

Tnx




IanJohnson wrote:

Another thing that has been done is a simple lever with magnets to hold it at the up or down position.  A bit of gcode causes the extruder to move past something that snags the lever, causing it to extend or retract.

Here is an example, using a screw to pull the lever out and put it away. - http://www.youtube.com/watch?v=uk29TIPouLk


I've done the electrical connection between the nozzle and bed for setting the Z tab before.  The problem with using it for probing is your build plate is no longer easily  swappable.  Also you would want to have a wire brush and a wipe routine.

]]> https://www.soliforum.com/user/264/ 2013-10-14T18:43:48Z https://www.soliforum.com/post/38924/#p38924 <![CDATA[Re: New bed level probe idea]]> So the ball bearing running all over just laid down extruded
hot polymer wouldn't be a problem?

I can't find spec on prox sensor   trigger at =/- 1cm ?
at the same distance all the time?

Russian roulette bed leveling?????


Hazer wrote:

Think about a specifically printed version of this:

http://www.amazon.com/Morris-Products-R … ler+switch

Or you could get this http://www.amazon.com/Diameter-Inductiv … ity+switch and glue some thin metal sheets just under the glass at the probe points. Contactless probe.

]]> https://www.soliforum.com/user/264/ 2013-10-14T18:40:48Z https://www.soliforum.com/post/38923/#p38923 <![CDATA[Re: New bed level probe idea]]> http://www.soliforum.com/post/38893/#p38893

Firmware is done. Latest marlin, all the solidoodle patches and tweaks.

I reckon 'babystepping' kills the auto-levelling in terms of immediate reward smile

Anyway, let me know if anyone has any dramas on the software side of things.

Will work for Printrboard variants too - just use motherboard 81 and dance the printrboard firmware dance...

]]> https://www.soliforum.com/user/663/ 2013-10-14T12:56:31Z https://www.soliforum.com/post/38894/#p38894