I have decided to jump into 3D printing and build a version of the Inmoov robot, here is the printer that I am going to buy, it looks a good spec.
www.dream3d.co.uk/product/ultimaker-2-desktop-3d-printer-2/?gclid=CJHR7aDloMUCFfMZtAodTU0Ang
I (personally) have no CAD knowledge, but I would like to convert the arms to the Bosch drives. They would be much more powerful (torque) than the existing servos, being virtually totally silent (I noticed the servo noise in @Aerius video that there was quite a loud holding buzz). The Bosch units already have a worm driven gearbox built in and also a feedback potentiometer. I think the Bosch units would greatly improve the Inmoov arms if a conversion can be done to allow for these these to be used with the current design.
As you have some Bosch drives, David and Richard R what do you guys think?
Tony
Asked
— Edited
On the Bosch unit, power one up at 12 to 20v and then try to stop the spindle - take care as the torque is so great that it could rip your fingers! They are near impossible to stop with your fingers. The current draw is amazingly low at only a couple of hundred milliamps on full load, so another huge advantage with these Bosch units are that they do not take huge currents so battery life is maximized.
Tony
What do you fellow Inmoov builders think, does it look like this is workable to you with the upper part of the Inmoov?
Tony
As long as he does quietly and is easily controlled.
Cheers
Richard
Will you sell low quantitys (4) of the Bosch motors and drive PC boards?
If so, what would the cost be?
Thank you.
I'm very interested in these motors for make shift high powered servos. Could you point me to a supplier for these and or specs/ dimensions? I'm interested in speed and torque vs size.
Thanks so much in advance.
Tony, please correct me if I mis-stated this. going from memory....
Alan
There seems to be a lot of interest of these Bosch motors you mention, and I see that you recomend them. What is the model number for these motors as I'm possibly interested in getting a few of these myself for an upcoming robot project I want to start, and wanted to look them up (specs, price, where to buy ect).
Thanks.
Steve.
BOSCH
VMC 12V 120804 3 (d5)
0 132 801 158 3
made in malaysia (905)
MF116880-1040 DEF LHD
VW Audi 4B2 820511 K
These motors have a pot, motor and gears. There is not a controller board. In order to use the servo, you have to use Tony's PIC, A Sabertooth or an H-Bridge.
These Bosch motors are a bummer. I got a few from @Dave and @Tony and they work so well...and they're strong. However, I can't get more of them...i tried to place a semi-big order but if I can't get them easily there's no point of using them on my builds, since I'm planning on mass-producing.
They're awesome though. Very quiet and low power consumption. Plus the main pain on my builds is getting the potentiometers to work right with the motors...this little Bosch unit has it all inside nice and neat.
I have so far given away over 40 Bosch drives all over the World free of charge and just checked the postage alone has cost me over £200. I do now need to start conserving what I have left for the first ALTAIR robot production runs - I am happy to supply Bosch drives and custom controllers to David as he may (hopefully) be converting the Inmoov .stl files to use the Bosch units and will be sharing these with me, so this is my way of saying thanks.
Rex found them in the US, but the cost is higher than I paid.
Search for
Heater A/C Air Flap Control Motor - 4B1 820 511 K 98-05 Audi A6 S6 RS6 Allroad
Hope this helps
Tony
Looking at the Inmoov, I am wondering if my base/leg section may be too small for the Inmoov upper body, here are the build dimensions.
Richard, what do you think? I may need to get a larger leg section fabricated for the Inmoov.
Tony
It also might look disproportionate due to the inMoov being as large as a small adult... So maybe you will need a wider wheel base and a taller leg section?
From what I can see, I guess the Inmoov probably needs to be around 5ft to look right, so the leg section may need to increased (taller) as you have determined.
Tony