our customers often ask about the backlash (or reverse play) for our RL-D joints. It is obvious, that any worm gear is NOT backlash free.
The backlash of our lubrication free plastic worm gear (usually combined with an aluminium HC worm shaft) can be influenced by temperature or payload. We have now measured the reverse play for different types and sizes of our joints at zero payload. As a result, we measured values between 0,20° and 0,45° on the output side of our joints (at the PRT = “polymer round table”).
We will now examine this more closely and give more detailed informations later. In our updated data sheet we state a reverse play of < 0,5° for all STANDARD and HIGH END joints. Download link for the updated data sheet attached.
DOWNLAOD LINK -101 (symmetrical with 2 PRT) tech-data-rl-d-101-_d-eng_16_02 (177.05 kb)
DOWNLOAD LINK -102 (asymmetrical with 1 PRT) tech-data-rl-d-102-_d-eng_16_02 (168.36 kb)
Better and more detailed STEP data of our joints and motorkits are now available on our standard igus download website: http://www.igus-cad.com/default.aspx?CUL=en-GB
We will improve this service soon with our DC motors and INI kits. please contact me for further informations or questions: firstname.lastname@example.org
Today I can supply our “official” igus video and picture of our SPS demo unit.
They can also be downloaded from here.
In addition another video with detailed explanation of the joint structure and the kit idea.
We will present our idea of robolink D as a joint kit for the design of individual robot arms with a new demo unit at the SPS show in Nürnberg.
The unit consists of 1 rotating table (d=1,2m), moved by 1 RL-D-50-102 and 2 robolink arms with 4 DOF each (one arm holds a rotating polishing wheel instead of a joint). The connections are made by folded metal sheets.
igus offers joints and motors plus accessories for our customers to design their individual robotic solution. We do not offer complete solutions or arms (like the ones on the unit), 3D Step data of the current metal sheet solution are provided for free on request.
The stepper motors in our arms are driven by Nanotec stepper motor controllers (SMCI47-S2) and an Arduino main board. Control parts are not part of our scope of delivery!
The current concept is explained in this Picture: