Recent Posts

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41
Robot Videos / Re: Rebirth of the ER1 Personal Robot Video
« Last post by gtabasso on July 08, 2016, 11:42:57 AM »
What do you do with it?
42
Robot Videos / Re: Rebirth of the ER1 Personal Robot Video
« Last post by kevinvr on July 07, 2016, 02:39:45 PM »
Here is a link to my website where I have a video of my ER1 going through the motions:

http://richardsrobotics.com/robotics/ER1Videos.aspx?CurrentSelection=7
This is wonderful. I will take my Kendy out too and see if I can revive him :).
43
Electronics / Re: Good durable servo for product
« Last post by Kyle Berezin on July 07, 2016, 02:48:04 AM »
We eventually decided on the ES08MA II. For a marginal increase in cost we easily doubled the quality. It is metal geared like the MG90s but it is much smoother and quieter. It is a faster motor and it also handles heavy loads better. The end-stops don't jam because it has no end-stops. They never buzz. They don't get as warm. We haven't yet had a single failure yet, we put them through their paces by making a robot arm (
) You'll notice the bottom segment holds up the entire arm with no support or mechanical advantage. If anyone is thinking of buying a tower pro MG90s, don't. For 25% more cost you can get the ES08MA II with at least twice the quality.

Kyle Berezin
44
Misc / Stepper/Servo Motor Help.
« Last post by SimyonP on July 06, 2016, 07:34:27 AM »
Hello Dear Forum members,

Currently working on a CE project in the Audio Domain.
As part of the product development, 2 axis holder for the audio array is to be designed(as can be seen in the attachment).
As a result, searching for a relatively cheap Stepper/Servo answering the following requirements:

1. Silent Operation.
2. Size< 1.5X1.5X3cm
3. Can Lift a 300 Gram array.
4. Price < 5 USD
5. Reliable.

Will be glad to hear which motors(and their models/manufacturers) may answer these requirements.

Thanks in Advance.
45
Electronics / How to make a sonar, my proyect
« Last post by Kristensen96 on July 06, 2016, 02:14:57 AM »
Hello everyone, thanks for checking this, my proyect is about making a 360 degree map using a sonar (is there a better sensor option?) The ultra sound devices wont cover as much as needed, So I want to create one (I would make a set of them, in order to create a circular -if not almost espherical- sensor, can anyone help me ? I can't find solid information, I would be glad!
46
Misc / Re: Help with fuse tripping please
« Last post by mklrobo on July 01, 2016, 10:59:45 AM »
 :) Hello!  :)
 To help analyze, lets look at the condition;
It all works flawlessly except for one issue. I have a 45-50 degree incline in the backyard and when I try to go up the hill I trip the 30A fuse and lose all power to the wheels. This thing is heavy. I have yet to weigh it but it has to be at last 200LB.
- In such an incline, the strain on the motors (obviously) exceed 30 amperes. The question is, how much
power
will be needed to overcome the incline?
You could track down some information that Bduell posted on motors to help you.(somewhere in the forum database) This would give you a sense of what is happening on the load.
If more power is what you seek, just to back up the motors in a jam, maybe you could put an
alternator on the gas engine to get more energy to the motors.(?)
I would not put in a fuse that exceeds a safety rating for the motors.(you will let the smoke out!  :'( )
Review the motor specs to see if they can stand more power, before you increase it. Otherwise,
bigger motors may be an option. Bigger batteries have more weight, which means more power demand.
Tire traction may need to be looked at. Pulse Width Modulation may be used to "cheat" in certain circumstances to get more power out of your motors.(more efficient).
Have fun, Good Luck!!   :) ;) :D ;D
47
Misc / Re: Help with fuse tripping please
« Last post by Schplitter on July 01, 2016, 06:51:28 AM »
Bump
48
Misc / Re: Help with fuse tripping please
« Last post by Schplitter on June 29, 2016, 12:34:21 PM »
lets try this again...

I built a remote controlled lawn mower using the following parts:

(1) 21" lawn mower w. engine to move the blade
(2) DC Motors w. gear boxes from a mobility scooter. (These are used to propel and steer the lawnmower)
(1) Wiring harness from mobility scooter
(2) 12v batteries from mobility scooter
(1) Sabertooth dual 32A motor driver
(1) FS-i6 Flysky AFHDS 2A 2.4GHz 6CH Radio Transmitter & FS-iA6 Receiver
(2) 18"x10" golf cart tires and hubs for traction
(2) casters up front to allow for steering

It all works flawlessly except for one issue. I have a 45-50 degree incline in the backyard and when I try to go up the hill I trip the 30A fuse and lose all power to the wheels. This thing is heavy. I have yet to weigh it but it has to be at last 200LB.

(1) Can I simply pop in a larger fuse to give the motors more power or will this blow up the Sabertooth and possibly fry the motors? The sabertooth can handle 32A per motor.
(2) Can I increase the battery count to 3 or 4 and increase the voltage to 36-48V effectively dropping the amperage or am I wrong here?
(3) Is there a better solution?

Thank everyone for your help!

Ben
49
Misc / Help with fuse tripping please
« Last post by Schplitter on June 29, 2016, 12:20:19 PM »
I built a remote controlled lawn mower using the following parts:

(1) 21" lawn mower w. engine to move the blade
(2) DC Motors w. gear boxes from a mobility scooter. (These are used to propel and steer the lawnmower)
(1) Wiring harness from mobility scooter
(2) 12v batteries from mobility scooter
(1) Sabertooth dual 32A motor driver
(1) FS-i6 Flysky AFHDS 2A 2.4GHz 6CH Radio Transmitter & FS-iA6 Receiver
(2) 18"x10" golf cart tires and hubs for traction
(2) casters up front to allow for steering
50
Software / Resistive Touch Screen with Arduino HELP
« Last post by jplopes31 on June 29, 2016, 06:56:04 AM »

Hi Guys,
I wanna do a Stewart Platform but I'm having difficult...
I have a resistive touch screen with 5 wires, and I need make it talk with the Arduino, but I have no idea how to do this.
Can someone help me?
Thanks guys.
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