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  • Robot Parts and Materials - Answer Thread

    Answers to your questions about Robot Parts and Materials.

  • #2
    Linear Slides

    Originally posted by FTC0548
    Are the following items (from Home Depot and Lowe's) considered legal Commercial Off The Shelf (COTS) assemblies as defined by R02.a.1 (Game Manual Part 1, Rev 4, Page 18, Linear Slides)?

    Lowe's Item #: 89226
    http://www.lowes.com/pd_89226-89973-...ide&facetInfo=

    Home Depot Store SKU # 404370
    http://www.homedepot.com/h_d1/N-5yc1...1#.UFw5zpiuKo4

    Lowe's Item #: 89226
    http://www.lowes.com/ProductDisplay?...llow&cId=PDIO1
    A: Yes, all three are legal COTS per Rule <R02.a.1>

    Comment


    • #3
      3D Printed Parts

      Originally posted by FTC0724
      We propose to design some plastic parts and have them 3D printed. We actually want to print them ourselves, but our design of the parts has come together before we have a working 3D printer - like a RepRap or Makerbot or hybrid. We intend to have finish our build of a 3D printer before we have any competitions, but we would really like clarification on the whole built part issue. So if we were to print our own part, we think we would be well within the rules, but what if we design a part and have it printed by someone else? Please clarify.
      A: 3D printed parts are not considered to be pre-fabricated or pre-formed COTS and are legal per rule <R02.b.1>

      Comment


      • #4
        Drawer Slides

        Originally posted by FTC5306
        Are "ball bearing drawer slides", available at Home Depot and Lowes, considered to be "linear slides"?
        A: Yes, "Ball Bearing Drawer Slides" are legal COTS assemblies per Rule <R02.a.1>

        Comment


        • #5
          T-slot Extrusions - Revised

          Originally posted by FTC4149
          Section <R02> b. 1. establishes that extruded aluminum is not considered a prefabricated part and thus falls into the raw material category. <R02> d. allows the use of raw materials provided that they are readily available from standard distributors such as Grianger or McMaster-Carr. My conclusion from this is that T-slot extruded aluminum extrusions such as those supplied by 80/20 and which are available from Grainger and McMaster-Carr, are allowable materials. Is this a correct conclusion? If it is, what are the limits on associated components which work with such materials such as fasteners?
          A: Yes, aluminum extrusions from 80-20, Macron, Parker, McMaster-Carr, etc. are legal per rule <R02.b.1>. The fasteners associated with this extrusion, such as T-nuts and T-bolts are also legal per rule <R02.d.3> .

          >>>>>Updated<<<<<<< The GDC has determined that prefabricated components such as corner brackets, joining plates, linear slides, etc. that are compatible with the extrusion are legal per rule <R02.a.1>.
          Last edited by Ming the Merciless; 09-25-2012, 08:21 PM.

          Comment


          • #6
            3D Printing - ABS

            Originally posted by 2010FTC2856
            Is 3D printing allowed this year (using eg 1/8" ABS as a base material)?
            A: Yes, 3D printing is allowed.

            Comment


            • #7
              Robot Parts and Materials - Answer Thread

              Originally posted by FTC1000
              Could a team design a method to pick up another robot with the use of a universal attachment that could be put on their alliance partner's robot prior to a match? Would that be legal?
              A: There is no rule prohibiting the use of a Universal Attachment. However this attachment must be fabricated from allowable materials and the robot with attachment must comply with all applicable robot rules.

              Comment


              • #8
                Pulleys and Cogs

                Originally posted by FTC0724
                it would sure be nice to allow some sort of pulleys and cog belts. I presume that they are excluded given <R02> "Prefabricated and/or Preformed COTS plastics or metal are not permitted..." but this rule could REALLY limit what we use for pulleys...eg, sewing machine bobbins - illegal, thread spools - illegal...right? so the only pulleys we can use are ones we make?
                A: Pulleys and cogs, including bobbins & thread spools, are considered COTS parts and are not legal per rules <R01> and <R02>.

                Comment


                • #9
                  Robot Parts and Materials - Answer Thread

                  Originally posted by FTC4250
                  Is PVC piping and couplers, of any size, considered as raw material or a preformed parts?
                  A: Yes, PVC pipe and fittings are considered a raw material and are allowed per rule <R02.b)

                  Comment


                  • #10
                    Robot Parts and Materials - Answer Thread

                    Originally posted by FTC3590
                    In reviewing <R02> d. It lists raw material, fasteners, standard bearings and bushings. Would typical helical/coil springs be allowed or are those considered an assembly?
                    A: Springs are considered a preformed COTS and are not allowed per rule <R02.b)

                    Comment


                    • #11
                      Wood

                      Originally posted by FTC4512
                      Hello, so we have questions about regulations for the robot build rules in 4.2.2 <R02> a.1. about linear slides and d.1. Raw Materials. Are vex linear slides allowed? http://www.vexrobotics.com/products/.../276-1096.html. And does wood count as an allowed raw material?
                      A: Yes, Vex linear slides are an allowed COTS per rule <R02.a>
                      Yes, wood is an allowable raw material per rule <R02.d.1>

                      In the future, please ask only one question per post.

                      Comment


                      • #12
                        Robot Parts and Materials - Answer Thread

                        Originally posted by FTC4144
                        Is the aluminum tubing from Servocity considered legal COTS?
                        A: The hollow aluminum tubing from Servocity (i.e. 2AT375) is considered extruded aluminum and is legal per rule <R02.b.1>

                        Comment


                        • #13
                          Robot Parts and Materials - Answer Thread

                          Originally posted by FTC3590
                          Would magnets be considered a raw material and therefore allowable as long as they were not preformed into a functional shape?
                          A: Magnets are considered preformed COTS and are not allowed per Rule <R02.b>

                          Comment


                          • #14
                            Robot Parts and Materials - Answer Thread

                            Originally posted by FTC3590
                            In rule <R02> b.1 states "Plastic or metal sheet, plastic spacers, and extruded aluminum are not considered to be prefabricated and are allowed with no restrictions on dimension or quantity provided no other rules are violated." and <R02> d.1 states "Raw Material (e.g. metal, plastic, etc.) provided that it is readily available to all teams from standard distributors (e.g. McMaster-Carr, Home Depot, Grainger, etc.). The definition of Raw Material are items before being processed or manufactured into a functional form." We want to clarify if steel is an allow material since the first rule stipulates extruded aluminum and the second says metal. Steel sheet/plate has been allowed in the past so we want to confirm if extruded steel of similar shapes to the listed aluminum would be allowed.
                            A: Yes, extruded steel shapes are a legal raw material.

                            Comment


                            • #15
                              Wood

                              Originally posted by FTC4137
                              What exactly constitutes raw materials?
                              In particular, would the following materials be legal:
                              - plywood
                              - MDF/particle board/tempered hardboard
                              - wood dowels
                              - wood studs (say 2x2)
                              - wood boards
                              A: Yes, the materials you have listed are legal per rule <R02.d.1>

                              Comment

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