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31
maybe he meant to say a key way any way a bolt through should work a bit rough and ready all relevant to power you intend to transmit tools you have etc
32
Mechanics and Construction / Re: Gearbox cleaning
« Last post by rastas on April 12, 2017, 05:19:38 AM »
ok clean out all of the old oil grease then clean with a solvent then see if there is any lumpiness growling stiffness etc look at the gears for any obvious damage same with the bearings
turn by hand
 also do the same with the other gearbox as if one is bad the other is not far behind
as for the type of grease go to a auto shop take a sample and ask for something similar 
33
Mechanics and Construction / Re: Actuators too small to simulate human arm?
« Last post by rastas on April 12, 2017, 05:09:51 AM »
hi in my opinion forget trying to reproduce the human movement it looks like a lift then drop movement simple to do with a pneumatic ram
34
Mechanics and Construction / Re: Use of linear actuator to rotate a part
« Last post by rastas on April 12, 2017, 05:02:29 AM »
well to keep it simple a gear rack and pinion
35
so I have an old oxy profile cutting machine that had a line follower "magic eye" that followed a drawing black on white drawn with a felt tip pen this magic eye drives 2 dc motors one x and one y the magic eye is also connected to both of these axis  as is a cutting torch the magic eye follows the drawing the torch reproduces the shape 1;1
 very simple to use KISS principal
 PROBLEM the magic eye is fried and I need to build a new one
  the dc motors are good they are geared  down nice and slow but has to be
accurate + - 1mm
 so if a line follower bot was used to drive them it has to drive forward backwards left and right as it follows say a circle
I am looking for advise as to how to do this
there is a vast amount of info on building toy line followers but I can not find any info on this type or how to arrange the IR censors
I dont want to reinvent the wheel here I just want it to work happy to buy kits and modify to suit but dont want to over spend and it has to be simple!
thanks in advance
36
Electronics / Re: online pcb services
« Last post by Dale.H on April 11, 2017, 02:24:38 AM »
China has a lot of goods on the PCB, because they are of good quality and very cheap.
So, the general order I will give some of the manufacturers in China.
Cooperated wellpcb manufacturers, board quality is also good. If  find other good manufacturers, after may be considered.
37
Misc / [advertisement] MASSIVE National Robotics Week Sale!
« Last post by ServoCity on April 10, 2017, 02:26:26 PM »
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38
Hello, people!

I'm designing a hardware containing the mbed and the WIZ610WI wireless module, and I want to connect those using a RS232 interface. But the wireless module requires a 5-wire connection, with the RTS and CTS lines, and I could not figure out how to use these connections with mbed UART.

Can anybody show me a way to configure a serial port in mbed that includes RTS/CTS? Would it be fatal for the aforementioned purposes to ignore these lines in my design?

Thanks in advance!
39
Software / Re: Android robot control app
« Last post by klims on April 08, 2017, 05:38:09 PM »
Whoops, accidentally double posted.
40
Software / Re: Android robot control app
« Last post by klims on April 08, 2017, 05:31:14 PM »
I've written a new version of this app for anyone who is interested.

Info can be found here
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