Results 1 to 7 of 7

Thread: Quick Sketchup question

  1. #1
    Join Date
    Apr 2004
    Location
    Comfort, TX
    Posts
    350

    Quick Sketchup question

    When drawing your designs in SketchUp, do you use nominal for your plywood or actual, i.e. 0.75" vs actual 0.709"?
    Tim in the beautiful Hill Country of Texas

  2. #2
    Join Date
    Dec 2008
    Location
    WV
    Posts
    4,336
    You'd be best to use your actual material thickness if you can if you are going to rely on the drawings for accurate cutlists to the shop. If you draw each part as a component you can somewhat quickly go back and adjust as needed but unless your using dynamic components its a lot of work to go back and change each individual part. If you material is on hand its would be best to start with relatively accurate material thicknesses.

    We run a paid plug into for cabinet parts that allows global adjustment of material thicknesses through a project component but theres no easy way that I know of to do it if your drawing from scratch.
    Sometimes I just want to look at pretty pictures,... Thats when I go to the Turners Forum

  3. #3
    Join Date
    Oct 2016
    Location
    Ogden, UT
    Posts
    603
    Inaccuracies start to build on each other and if you aren't careful they can be very painful (even with parametric design) to change / fix towards the end.

  4. #4
    Join Date
    Nov 2013
    Location
    Waterford, PA
    Posts
    662
    I don't know if Sketchup offers parameters as Fusion360 does. I usually setup parameters named things like "Plywood750" and "Plywood500" etc. You then reference these parameters for dimensions when drawing the sketch. Later, when you know the actual thickness of the Plywood you purchased, you just change the value of the parameter and all appropriate changes are made to the sketch.

    Maybe someone that works in Sketchup can advise as to whether this is available to you.

  5. #5
    Join Date
    Dec 2008
    Location
    WV
    Posts
    4,336
    Quote Originally Posted by Lisa Starr View Post
    I don't know if Sketchup offers parameters as Fusion360 does. I usually setup parameters named things like "Plywood750" and "Plywood500" etc. You then reference these parameters for dimensions when drawing the sketch. Later, when you know the actual thickness of the Plywood you purchased, you just change the value of the parameter and all appropriate changes are made to the sketch.

    Maybe someone that works in Sketchup can advise as to whether this is available to you.
    It is with an asterisk. Dynamic components can be setup but when your building a lot of parts there are issues of inset points, reference faces on dado's and other joinery/hardware if your going that deep. It's not really something worth the effort for a part here or there or a single project.
    Sometimes I just want to look at pretty pictures,... Thats when I go to the Turners Forum

  6. #6
    Join Date
    Nov 2013
    Location
    Crozet, VA
    Posts
    384
    I typically use 23/32 for “3/4 ply” in sketchup.
    There is a very fine line between “hobby” and “mental illness.” - Dave Barry

  7. #7
    Join Date
    Mar 2006
    Location
    SoCal
    Posts
    20,896
    Plywood thickness is too variable for me. Probably due to the intermittent use and random supply sources. This makes it too unpredictable to bother with a "standard" plywood dimension for me. Since sheet goods are normally used for things like shop fixtures or jigs I will do both of the things you mention.

    For speed I will just use 3/4", 1/2", 1/4", etc. The diagram becomes a guideline and I measure the actual dimensions off of the base parts as I build. For accuracy, like on jigs, I will measure the plywood I plan to use in several areas, average the dimensions and use that. In practice I will, for example, make a rectangle that is 12-1/4" x 23" and then pull it to the thickness of 23/32 or whatever if that makes sense.

    The diagram is still a guideline to some extent. An outline, if you will, for where I am going with the build. I started measuring many final parts off the piece as it is being built years ago and this is my typical method still. Don't get me wrong, I am not selling the idea of being loose with your dimensions. I can build a piece and build another one a year later that matches. I just don't use the method of cutting out all my parts per the plan and expecting them to go together beautifully
    Last edited by glenn bradley; 11-26-2020 at 11:06 AM.
    "The Danish government believes that if we train 5,000 designers, and produce
    one Hans Wegner, the money is very well spent." - Ole Gjerlov-Knudsen

Posting Permissions

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