As I have now sent quite a few Bosh motors to friends here on the forum (Steve, yours are on their way) and also after reading Dave's well written review, I thought it would be good to give more information on these motors to the group.
Without modification the motors have 100 degree of movement, once you cut off the actuator arm (to get the 6mm spindle) the motor will rotate 360 degrees there are no internal stops. The internal pot is only active for the 100 degrees.
I needed 180 degrees turn on the EZ:1 and EZ:2 head pan smart servo (shown below) and I achieved this by modifying the smart servo firmware so that when the smart servo controller gets 2 to 99 it accurately moves through the whole 100 degrees and if I send 1 or 100 then the controller sends the motor 40 degrees past the 100 degrees in both directions. Centering the servo (back to 50) always accurately re-syncs the motor position as it is half way into the pots travel.
To get the original actuator arm off, very carefully with a hacksaw blade cut down one side of the actuator to reveal one side of the spindle, once this is clear then with a gentle prying from below the actuator the arm usually just pulls off.
Here are the 6mm hubs that fit the motor spindle.
Here is the plastic box that holds the smart servo PCB.
Here is more info on the motor drives
Hope this is of use.
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Anyone know if you could buy them here?
Search for Heater A/C Air Flap Control Motor - 4B1 820 511 K 98-05 Audi A6 S6 RS6 Allroad
The part number is 4B1 820 511 K. This is the same part number as the one Tony uses. I have seen other motors available with letters on the end of the part number other than K but I don't know if they would operate with the same torque. So be careful when searching. I have seen prices for used motors from $14.29 to $24.95. I found one site that sells new ones and they cost around $172! *sick*
True that, but at least a possible source if you just have to have one and don't trust used...
Large 6mm Set Screw Hub
Small 6mm Set Screw Hub
Aluminum Large "C" servo Bracket
Aluminum Long "C" servo Bracket
0.770" Clamping Hubs
0.625" Aluminum Clamping Hubs
For those on the group that may have not seen these Bosch motors in action, here is a video of the EZ:1 5DOF arm in action.
Each smart servo has a blue LED status/debug indicator and they do relay a lot of information on what is happening with the servo itself.
I would like some feedback from the group on these LEDs, do you think they currently look too much (like a Christmas tree) or do you think they look ok? I am wondering about reducing the flashing or using duller colours that do not stand out so much. Thanks in advance to anyone who gives their opinion!
Duller lights are a matter of taste. I love lights but don't like them to blind. Sometimes less is more. Anyway, can you add a user controlled dimmer? That totally puts the decision in the hands of the end user.
You should give your bot a British accent. You guys over there sound so cool when you talk. The ladies sound sexy. I have my GPS in the car set to a female British voice. It sounds just like Claudia Black in Farscape.
Sorry for going off subject but Claudia flips my switch.
Glad you like the LED's. its was one of our design team that said "it looks like a Christmas tree" and that got me thinking that maybe the flashing was too much. I might just reduce the scan flashing so it only flashes debug info.
I like the LED lights, especially if they are relaying useful information. That makes them more valuable then just having displays for show, they are functional and purpose generated. I guess a dimmer or toggle switch option would be nice, if not too pricey.
I would just leave mine on.
Can I order my female robot with a slight British accent?
That still amazes me how an arm that long can lift that beverage so well and quietly.
I think British accents are the coolest.