Seems like current version of Scara 3d printer is done.

12 hours of continuous printing time.

Summary is 3d approximately.

Quality is enough for current version.

In a few days I will finalize scad and read.me file and ... v2 development.

Ideas for v2:

• x8 or x9 gear ratio (current is 5, with x8 precision will increased in 1.6)

• Belt path will be shortened twice (no belt couplers at all)

• No teeth on big pulleys at all (more precision, easy to print).

• Smaller dimensions (but with the same print area).

• A lot of improvements - more modular and service friendly

• Z axis will be improved (at least 2 bearing for each rod and may be threaded rod, more modular way to attach - currently is hard to upgrade without disassembly)

Scara - new video (test wall printing)

OpenScad files and firmware - https://github.com/pavlog/sscara

Scara arms redesigned to match e3d v5

Note: This is not original e3d v5 (I did it on lathe), but sizes matched to e3d blueprint.

Scara hot end

Current PTFE based hot end is bad.
I have super idea how to use cheap and common E3D V5 (long).
Idea in short: One end effector arm is extended a little bit and hot end will be attached to this place (actually any extruder), firmware math required a few extra calculations.
Wait for images in near future.

E3D V5 like hot end on aliexpress

Scara first 3d print.

First print (0.3 nozzle)

OpenScad files and firmware - https://github.com/pavlog/sscara

 

Scara updated extruder

After a few first tests extruder completely redesigned. (Old Spring loaded extruder is not good)

Programming RAMPS 1.4/Arduino via Bluetooth

My way to update firmware via Bluetooth (I used HC-05 module wired to AUX-1).

1) In Arduino IDE choose bluetoth serial port you need.
2) Run upload process.
3) Press and release reset button on Ramps. (see NOTE)
4) Wait until finished.
5) Press and release reset button on Ramps to restart new firmware.
NOTE: About 3) - Your need some luck to catch good moment, me usually press and release reset button after "stk500v2_ReceiveMessage():" message in Arduino log window. Everything is going ok when green serial led starts blink continuously.

Sscara hot end

Material PTFE.

Voltage regulator on Arduino Mega

Voltage regulator on Arduino Mega is not good.

Too weak to supply power to LCD adapter and Bluetooth module.

Was damaged by third run. Replaced to LM7805.

SScara bed support printed and assembled

Bed support.

Sscara photos

Current state.

State: arms still not fixed, nozzle is absent (work in progress)

Small SCARA OPENSCAD intermediate result 2

Status - "Work in progress".

All parts are designed and (mostly) printed.
Major improvements - to keep strong structure i decided to use Aluminium L type profile for base and for bed (sizes depends from .your local stores, my 15x15x1.5 for base and 10x10x1.2 for bed support)
GitHub - https://github.com/pavlog/sscara