Firmware for delta ?

Hi
Can anyone know if there is a modified firmware for this style of delta printer ?



I want to build one !!!

Edited 1 time(s). Last edit at 06/29/2014 04:27AM by fourmi.

Building such a mechanics is the trivial part. I'm sure firmware developers will accept you code changes to get it running.

Edited 1 time(s). Last edit at 06/29/2014 06:33AM by Traumflug.

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Generation 7 Electronics	Teacup Firmware	RepRap DIY

It would be lovely if someone has developed a canned firmware... but well angular/rotational/circular delta is not quite popular.

I'm building one too. Same thoughts as Traumflug, I am ready to make some changes to the firmware. But I'm a newbie to reprap firmwares (this is my 1st 3d printer), so any tips about where should I change/insert the code? Like before some subroutine etc?

You can join the queue of those promising to do such things: [github.com] Actual code so far: zero.

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Generation 7 Electronics	Teacup Firmware	RepRap DIY

Hope that it won't be long before the queue starts to move

But back to the topic, I noticed you mentioned the current approach is "is to split all movements into small pieces, recalculate them to the non-cartesian coordinate system, then queue them up as if they were cartesian". Any opensource firmware released for this type of delta? If not, which one do you suggest that I can modify for delta?

I've noticed that most RepRap uses stepper motors but my delta uses servo motors. That makes me confused of where / which to start changing the code. Thanks for your help!

It's people like you which have the means to get the queue moving.

That said, servo motors are a whole different matter. AFAIK, no RepRap firmware has support for these things. Unless they come with a driving electronics which allows to drive them with Step/Dir signals. Maybe LinuxCNC helps.

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Generation 7 Electronics	Teacup Firmware	RepRap DIY

For the past few hours, I've been looking at the reprap wiki. Indeed, not much support to servo so far. Linuxcnc seems to be workable, but quite unfriendly to a linux-phobe like me.

In short, I need a minimal firmware. It can be a g-code interpreter (controls nothing) or a prototype firmware (Marlin seems too complicated to modify). And now "why?":

I would like to kick start with simple implements: first make a firmware that operates in the crude approximation way, then work on real lines (ie nonlinear in angular movement).

The first step is easy: all I need is to modify the hack the calculations for steps into servo angles. Trossenrobots provided a c-code for that.

As a Linux-phobe, expect hard times when doing open source development. The only usage of Windows there is to host a unix-like environment.

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Marlin seems too complicated to modify

That's why I invited you to hack on Teacup, not on Marlin.

Undoubtly you'll find your luck.

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Generation 7 Electronics	Teacup Firmware	RepRap DIY

I've seen the file structure on github. It scares me with the number of files. (Forgive me, I am just a amateur hobbyist in programming.)

To save time, it's best to ask the expert and the author. Which file do you expect me to work on if I have to hack?

Basically I need to change 2 things (which you may know):
1. incorporate (X,Y,Z) |---> (t1,t2,t3) functions (inverse kinematics)
2. bypass control on stepper motors and make it for servos


It would be very helpful if you could trim down the bundle to a minimal model: get g-code from serial --> interpret it --> command the steppers (and delete extruder control etc). Thank you in advance -- and forgive me again for the complicated architecture cannot be stuffed into my poor little brain

I know I should have looked at it by myself but I might not have enough time in the remaining summer time... So hope you have the time and save my garbage delta

The keyword that you are seeking is: PolyBot. Feel free to hit Thingiverse and Google for other attempts at this design.....

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vreihen
The keyword that you are seeking is: PolyBot. Feel free to hit Thingiverse and Google for other attempts at this design.....

Yes! It's what inspired me but, no, it is not yet a RepRap workable 3D printer, based on my googling. The only source code it provides is wii-controlled movements, no g-code and anything else. Others also say that they have not reached a precision high enough for CNC. But thanks for your advice!

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penelopeblue330
Which file do you expect me to work on if I have to hack?

As written in the issue discussion linked above, have a look into the dda-split branch. It doesn most parts of what you want to achieve already.

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Generation 7 Electronics	Teacup Firmware	RepRap DIY

Thanks! I'll work on it.