Register To Comment
Page 1 of 20 12311 ... LastLast
Results 1 to 10 of 200

Thread: Team Pasty Build Diary: Loki

  1. #1
    ChrisKazoo's Avatar
    Roboteer

    Status
    Offline
    Name
    Chris Salway
    Robots
    Loki (HW), Loki 3 (FW), Loki 2 (FW)
    Location
    Cornwall
    Posts
    185
    Post Thanks / Like
    Hi Guys, pretty new here so this is my first post. I've started building a featherweight which I am naming Loki (hopefully it's not taken!). It's going to have electric lifting forks, inspired by Panic Attack and Biohazard. At the moment I have an MDF mock up of the chassis and the following components:

    2x drill motors
    2x BotBitz 85A ESCs
    1x Orange 6CH RX
    1x Spektrum DX5E TX
    2x 75mm RobotChallenege Blue Wheels
    2x 7.2V 3300 mAh NiMH batteries in parrallel (borrowed from my Battle Rat, Nasty Pasty)

    The final chassis will be made from HDPE and hopefully if I can get enough cheap off cuts the armour will be titanium. I have a few new bits and bobs coming next week, a Turingy V-Tail Mixer (controlling is interesting at the moment!) and 2x 9.6V 3300 mAh NiMH batteries and an electric actuator.

    Would appreciate feedback/tips/advice

    Here's some photos of progress so far:
    [attachment=1:kf34ow3k]2013-02-22 22.06.41.jpg[/attachment:kf34ow3k]
    [attachment=0:kf34ow3k]2013-03-03 15.29.39.jpg[/attachment:kf34ow3k]
    And a video:
    Attached Images Attached Images
    Chris Salway

    TEAM KERNOW

    2014 UK FW Annihilator Runner Up
    2016 UK FW Top 12

    Pasty Powered

    Facebook
    Photobucket
    YouTube

  2. #2
    Member

    Status
    Offline
    Posts
    374
    Post Thanks / Like
    Cool design, what controllers are they?

  3. #3
    Ellis's Avatar
    Roboteer

    Status
    Offline
    Name
    Ellis
    Robots
    Pulsar (Robot Wars) + ~10 more.
    Location
    Madeley, Shropshire
    Posts
    1,664
    Post Thanks / Like
    ^They're the 85a Botbitz speed controller. It's a reprogrammed and electronically tweaked brushless motor controller. Here's their site: http://www.botbitz.com/

    As I have said, your machine is looking very nice thus far, Chris! You're going to be amazed when you up your batteries to the 9.6v in series, the machine will be over twice as fast as it is now.
    Ranglebox.com - ESCs, motors and gearboxes!

    Pulsar sponsored by: GWR Fasteners, K-Cut, Start Workwear and CorkCNC(@gmail.com). Follow on Facebook & Twitter!

    Past builds: Tormenta 3 (FW) - Rango (FW) - Newton and Gonzales (BW) - Tormenta 2 (FW) - Tormenta (retired FW)

  4. #4
    Member

    Status
    Offline
    Location
    Viana do Castelo, Portugal
    Posts
    126
    Post Thanks / Like
    Will it be a four-bar lifter like Biohazard or fork lifter like Panic Attack?
    Doesn't the Spektrum DX5E have built-in mixing?
    How will you control the lifter? Another BotBitz 85A ESC or using an H-Bridge?

    I know it's just a mock-up buy, when you get the actuator, make the robot as compact as possible, you will save lots of weight and money in materials.

    Looking good.

  5. #5
    Eventorizon's Avatar
    Member

    Status
    Offline
    Name
    Alex
    Robots
    Conker 3: Insomnia 58 Champion - Binky: Still Alive
    Location
    Yorkshire
    Posts
    1,693
    Post Thanks / Like
    http://www.spektrumrc.com/ProdInfo/File ... Manual.pdf

    Go to page 11 on the PDF. Look at ELEVON/DELTA mixing. This will allow you to mix the signals at the transmitter without the need for a separate one in the robot.

    You may have to swap cables going into your receiver around or reverse a channel but it will work with the right combination!

  6. #6
    ChrisKazoo's Avatar
    Roboteer

    Status
    Offline
    Name
    Chris Salway
    Robots
    Loki (HW), Loki 3 (FW), Loki 2 (FW)
    Location
    Cornwall
    Posts
    185
    Post Thanks / Like
    Quote Originally Posted by Merkabah_PT
    Will it be a four-bar lifter like Biohazard or fork lifter like Panic Attack?
    Doesn't the Spektrum DX5E have built-in mixing?
    How will you control the lifter? Another BotBitz 85A ESC or using an H-Bridge?

    I know it's just a mock-up buy, when you get the actuator, make the robot as compact as possible, you will save lots of weight and money in materials.

    Looking good.
    It will be a four bar lifter with forks, at least that's what I'm aiming for.

    I tried to find out about the mixing, from what I've read it doesn't but I could be wrong. I'm all new to this lol

    Yeah I've made an H-bridge to control the lifter, tried to upload a picture but it only let me do 2 for some reason?


    And thanks I'll keep compactness in mind

    Quote Originally Posted by Ellis
    You're going to be amazed when you up your batteries to the 9.6v in series, the machine will be over twice as fast as it is now.
    Looking forward to it
    Chris Salway

    TEAM KERNOW

    2014 UK FW Annihilator Runner Up
    2016 UK FW Top 12

    Pasty Powered

    Facebook
    Photobucket
    YouTube

  7. #7
    Member

    Status
    Offline
    Location
    Viana do Castelo, Portugal
    Posts
    126
    Post Thanks / Like
    Eventorizon posted the manual for you TX, take a look at it.

    It took me about 1hour to be able to connect my TX to the computer and make the mixing work. Trial and error.
    My TX alows me to connect it to the computer while i operate the robot, so i could test every change as i made them.

  8. #8
    ChrisKazoo's Avatar
    Roboteer

    Status
    Offline
    Name
    Chris Salway
    Robots
    Loki (HW), Loki 3 (FW), Loki 2 (FW)
    Location
    Cornwall
    Posts
    185
    Post Thanks / Like
    Chris Salway

    TEAM KERNOW

    2014 UK FW Annihilator Runner Up
    2016 UK FW Top 12

    Pasty Powered

    Facebook
    Photobucket
    YouTube

  9. #9
    Member

    Status
    Offline
    Location
    Viana do Castelo, Portugal
    Posts
    126
    Post Thanks / Like
    Reversing the channel should do exacly the same thing as reversing the motor wires, but if ch.rev. isn't working you can do that.
    I don't know how to mixing is done on your TX, but in mine i have to assign 3 pairs of master/slave channels and say their percentages, like:

    Master: ch1 %:100
    Slave: ch2 %:-100

    I had to mess around with rev. and +/-% to get it right.

    Try to reverse the motor wires, if that does the trick, you are all done.

  10. #10
    archie2000's Avatar
    Member

    Status
    Offline
    Location
    N.W england
    Posts
    797
    Post Thanks / Like
    Looks very nice for a wood bot.
    Forget the ti stick with MDF

Register To Comment

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •