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I really dont like having the micro switch on the servo arm directly.
with my setup it always knocks into the heated bed.. so i wanted something that would move down and up vertically instead
Thoughts on the attached
http://3dprintboard.com/attachment.p...tid=5284&stc=1http://3dprintboard.com/attachment.p...tid=5285&stc=1http://3dprintboard.com/attachment.p...tid=5286&stc=1http://3dprintboard.com/attachment.p...tid=5287&stc=1
Its definitely an idea and worth a try though you will need to figure out some way to attach a servo horn to it or it will slip all the time.
Have you tried a web search for something like "linear R/C servo" or "linear R/C actuator"? I've always figured one of those would be a better way to go than a rotary servo. It could be that they're too hard to find, too bulky, too heavy or too pricey, but they might give you some ideas.
There are also "micro" sized linear servos such as the SPMSH2040L from Blade/Spektrum, but they can be really jittery, especially with no airfoil load on them.
I would embedd the servo horn into the Gear, so it shouldnt slip
the servo only does a 180 revolution.. so in reality only have the gear teeth are needed
yes i looked up RC Linear actutors first, but they are between $60-$100,
so depending how well or badly this works.. that is plan B
I wonder how much backlash those RC Linear actuators have.. also how accurate they are, in terms of hitting the same exact position when extended.
Yeah... This is an interesting idea, but my concern would be all the slop in the gears. Will you really be able to measure accurately with all that backlash?Quote:
Originally Posted by adamfilip
herringbone gears maybe?
Why not just upgrade to the current software? Using the firmware supplied by Colin the ABL probe would impact the bed when retracting.
With the current enhanced firmware the z axis moves up before retracting the probe. It works pretty well.
I'm running a fairly recent build of marlin
what version are you referring too?
Quote:
Originally Posted by adamfilip
in the last couple weeks most of roxy's enhancements have been merged into the main marlin branch, and shes managed to fix some of the bugs :-) update firmware and see how it goes
The one thing that is 'under discussion' is whether there can be a #define to say where the origin is on your build plate for the Topographical Map. Some of the powers to be think people can rotate things in their head instead of 'cluttering up' the Configuration.h file with an extra #define. But so be it! At least we won't have to maintain separate code bases going forward! Thanks for your help on this Sniffle!!!!!!Quote:
Originally Posted by sniffle
Quote:
Originally Posted by Roxy
your welcome :-) and they merged it :-) now i need to figure out which origin to use because Z safe homing sets the home point to the center
The home point does not affect where the origin is. If you tell PronterFace to home X & Y, that is your origin corner (assuming you home towards minimum).
I have updated, i notice some different behaviours, When it homes Z, it still kicks back the Z probe before it lifts up, can this be fixed?Quote:
Originally Posted by sniffle
Ok during ABL it still seems to retract the servo probe before it runs the Z prob ending script for some reason.
made this idea a little bit less work
this is ruff just made it over the last 20mins or so
https://youtu.be/8XnLLZ3DyZE
When it's done i will build it test it then post it
note
i have Marlin latest dev built setup and ready to go for the i3v 12" on the RAMBO board i update it daily !.
pm any time
Thats sweet, what do you design in?
solidworks 2014
I thought that was prob it, I have been trying to learn Fusion 360 and its simple and complicated.. im most comfortable and quick in Cinema 4D but its difficult to be accurate with C4D.
Would you be able to send me a STL file that I can mess around with. or some other format?
a critical point for any of these linear probe movers is that they have to have a solid repeatable stop at the bottom. relying just on gear positioning or a servo arm to hold the probe in the right place will not be accurate.
agree BUTQuote:
Originally Posted by TopJimmyCooks
i use an inductive probe on one printer and an optical beam break on the i3v with a solenoid that unlocks the probe all controlled by an attiny45
this is everything for the model in the video. solidworks parts + STL's + part drawings (for people that can't open solidworks files)
not tested not printed 100% not finished most likely never will be
https://www.dropbox.com/s/72afhfj92r...parts.zip?dl=0
I assume that it would need to put pressure on the plunger against a physical endstop to get a consistant stop point, to eliminate backlash or wobble
honestly a simple pull down spring with about 1/2lb pull with fix thatQuote:
Originally Posted by adamfilip