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  • Get Shrekt

    Been a long time since I last posted on here, but I thought I’d share what I’m up to right now. Any of you on Facebook will probably have seen my Featherweight spinner “Get Shrekt”, it’s a big green thing with an Inertia disc that likes to throw other feathers into roofs, which, came as a surprise to me!. Since it first appeared at Maidstone it’s been sitting in my garage unloved, so with Manchester just on the horizon I thought I’d give it some tlc and bring it along.
    7161902E-AF0C-4F40-8363-B2F330E0FB6E.jpg

    Shrekt was finished in a rush for Maidstone and, as a result it had some things that were a bit suspect/not as good as they should have been, so I’ve been going through it and fixing the things that need fixing. I decided that the majority of the chassis was probably fine to keep, however the side panels needed to be redone, so they were the first thing on my list, they’re 25mm hdpe and also act as the mounts for the drive motors.
    5F567898-788A-48B2-9374-6AB95F5048F2.jpeg

    Next up was the mount for the brushless motor that spins the disc, because I was in a rush last time I used the cheapo Aluminium mount that came with the motor. On a particularly big impact it twisted something rotten, so I needed something more robust.
    F4040615-0034-4E2E-93A0-E7007C3CE7AD.jpg 90056445-CC3E-4180-AFCB-5D60056925DE.jpg 9D833CDD-CCB1-413A-B160-8ED634B5663F.jpg

    Enter this little fellow on the right (old mount on the left), it’s made from 5mm 6082 Aluminium and is substantially stronger than the old one. Hopefully this will allow Shrekt to give big hits without bending out of shape. The next issue was something altogether worse, I discovered at Maidstone that the weapon shaft had been spinning in the bores, wearing away at the material and making the belt lose tension. So to fix this I made up a shaft lock, that threads onto the end of the shaft and the bolts into the bulkhead. This both stops the shaft spinning and acts as a mount to keep the shaft in place. It’s made from 15mm 6082 Aluminium, that I cut with a hacksaw then drilled using my new pillar drill, then tapped it to m12. I can’t tell you how useful the pillar drill has been for making parts like this, I couldn’t do them without it.

    8B78E8A5-A5D5-4720-BF49-4EE2C8712059.jpeg 74923056-4AAA-4352-8717-70D5C5DF0C45.jpeg FFC4DFA6-3EB1-4280-9C13-46B8696D6F89.jpeg

    Thats all for now, but I’ll try to remember to post the rest of the upgrades as and when they happen.



    Cheers,
    Sam

  • #2
    Ooooooohhhhhh.... its back! I look forwards to seeing this at Manchester if it makes it.

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    • #3
      great, I may have to face this at me first event =P Speaking of which where is the entry forms for Manchester ?

      Comment


      • #4
        It is here:

        http://www.emailmeform.com/builder/f...ZLgQK6073tYFlz

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        • #5
          Done a bit more on “Shrekt” over the past couple of days, mainly beefing up the chassis. Previously it was held together with screw In threaded inserts which I just never trusted, so these have been replaced with barrel nuts as I’ve used them for years and never had a failure. I’ve also made a start on the wheel guards, these protect the wheels but also help to minimise the gyro when turning.

          4E972228-CF32-44D0-97A3-4810AFA30F7F.jpeg F58ECD94-EEC5-4CCC-A785-DF8267EDDCF2.jpeg

          More updates to follow

          Cheers

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          • #6
            Looks like it is coming together nicely - curious though as to how the guards help with the gyro effect?

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            • #7
              They help a couple of ways tbh, firstly they make the robot wider and secondly, when Shrekt had exposed wheels there was nothing but the wheels to lever against when turning, hence the amount of gyro. The wheel guards basically act as a stop point for when the robot does gyro.

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              • #8
                I love your robots. Is it ok to ask how you cut your HDPE?

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                • #9
                  I tend to cut all my plastic now with a hand held panel saw then clean it up with a rasp and file.

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                  • #10
                    Oh cool. Cheers for replying.

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                    • #11
                      Done a bit more work on Shrekt, namely tidying up the internals and making sure they’re as protected from shock as possible. I’ve also put the front forks back on, they’re probably not the most functional things but they look pretty cool. At this point the robot isn’t far off finished, and I have plenty of time until Manchester, not used to being ready this far in advance!

                      FF7D230D-ADF4-481A-8DF1-F64754B6FD71.jpg 58A03C6A-6E87-4567-98CD-A6366EB40182.jpg F1AACD3D-0EA7-4E16-9418-D849080AAD8A.jpg 542E3FEC-95A1-4E0A-A9B3-4897475E1E76.jpg

                      Cheers
                      Last edited by mrsam; 22 March 2018, 11:44.

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                      • #12
                        So I had a few days off from work and was able to get Shrekt finished and ready for Manchester. It’s not as perfect as I’d like but for something basically handmade I won’t complain too much. Looking forward to seeing what it can really do!

                        D59AFE73-8DA4-49A5-B29D-34C98AC5BC5D.jpg DD993B83-BF39-4FF6-A5FB-0F213E755935.jpg

                        Comment


                        • #13
                          Haven’t updated this in a while, Get Shrekt has had a major overhaul the past couple of weeks.

                          So Insomnia was a great event for Shrekt, it won all of its qualifiers by knockout and managed to get all the way into the top 8! Not bad for a first event. However it did show up some flaws with the design that I couldn’t really ignore and with Cheltenham on the horizon I thought I’d fix some of the more major stuff and bring it along.

                          First up was the weapon bulkheads, when I built Shrekt initially I didn’t really pay much attention to the angle at which the wedge fed stuff into the disc, or how long said wedge should be. As it turns out, having a super shallow, super long wedge isn’t great for consistent bite. To fix this I completely re-made both bulkheads with a much steeper wedge mount, to get the wedge almost parallel with where the disc tooth comes around. This should result in much bigger hits more consistently.
                          7BA61AC4-842D-4215-AB7F-40E78458ACAF.jpeg E5AE7463-400A-4172-96CC-CB0F31D6D994.jpeg

                          Next up, addressing the slight issue that in every fight At Insomnia, Shrekt bent the shaft for the weapon motor. I’ve put this down to 2 things, the shaft material and the lack of support between the back of the pulley and where the shaft goes through the bulkhead. I made a new Grade 5 Titanium shaft and also added a bearing to the bulkhead to hopefully add some extra support.

                          B8768763-FF6F-47FD-92C7-8D5DC44067B1.jpeg 918A2F45-AFAA-4293-B00C-E62EBEE45677.jpeg 9D15CC55-0672-4919-B0E1-7002344B4FF0.jpeg

                          Decided that the bodged, fairly weedy wheelguards should probably go too. They’ve been fine but whilst I was fixing everything else I figured I’d do that as well. The old ones were a mix of 15 and 20mm hdpe, the new wheelguards are all 20mm with 35mm thick bar at the back, much more substantial.

                          8C1A15B2-1E22-4CBE-AD49-AA414E47B7E2.jpeg

                          All that was left to do now was some new top covers and mounting the wedge. I had planned a new wedge but for a spinner heavy live event I didn’t see much point I risking getting it damaged. I’ve just cut the old wedgelet down by about 45mm and resharpened it.

                          43EE5B03-9029-4319-941E-D1CE25E9B671.jpeg 7B5DC906-3327-4EAD-BBA0-208800193419.jpeg 4BB63050-1B48-4A55-924D-594D0D7CF90D.jpg

                          Apologies for the slight word vomit, Lots to talk about.

                          Shrekt will be at Extreme Robots Cheltenham this Sunday so I’ll hopefully see some of you there!

                          Cheers, Sam
                          Last edited by mrsam; 10 November 2018, 08:24.

                          Comment


                          • #14
                            Do you drill everything with a cordless drill? It's always so accurate!!

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                            • #15
                              I use my drill press for most things nowadays, best tool I ever invested in. For stuff that I can’t put on the drill pres like the wedge mounts and base of the bulkheads etc I use a cordless drill.

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