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# Volume (price) calculations don't appear trustworthy

Volume (price) calculations don't appear trustworthy [message #1866] Mon, 03 November 2008 10:21 UTC
Ok - I have to say that the pricing policy is great - only paying for volume printed. It's just that I don't trust the volume calculations.

I have uploaded a design stage by stage, and the price (volume) calculations don't make any sense.

All prices quoted are in WSF

The first part, an empty tube with 1mm thick walls, ID = 35mm, OD = 37mm and height 23mm costs \$4.86 which equates to 2.6 cm^3. This is the correct volume.

Cylinder model

Add a ring of warped text to the top of it, thickness = 1mm, height = 7mm. If it weren't text, but a solid cylinder it would have a volume of 0.8 cm^3. Since it is text, it should be a lot less than that. However the price for my original cylinder plus text ring is now \$10.17, or a total of 5.4 cm^3, more than double the volume and cost of the plain cylinder alone.

Cylinder plus text ring

Something funky is going on with the text volume calculation.

It gets worse.

If I add a ring of text around the original cylinder (not on top of it) so that the effect is embossed text raised 0.5mm, that should add much less than 0.4 cm^3 but it adds another 2.8 cm^3 or 2.9 cm^3 (I have two such embossed text rings).

So my final model is being priced at \$20.91 when the price should be well less than \$10. Probably less than \$7.00.

It doesn't really give me much confidence in the pricing for more complex models.

Would anyone care to explain what's going on?

 Volume (price) calculations don't appear trustworthy By: Xcapee on Mon, 03 November 2008 10:21 UTC Re: Volume (price) calculations don't appear trustworthy By: Whystler on Mon, 03 November 2008 15:04 UTC Re: Volume (price) calculations don't appear trustworthy By: joris on Mon, 03 November 2008 18:27 UTC Re: Volume (price) calculations don't appear trustworthy By: Xcapee on Mon, 03 November 2008 20:20 UTC Re: Volume (price) calculations don't appear trustworthy By: Xcapee on Mon, 03 November 2008 21:33 UTC Re: Volume (price) calculations don't appear trustworthy By: Xcapee on Tue, 04 November 2008 20:34 UTC Re: Volume (price) calculations don't appear trustworthy By: joris on Wed, 05 November 2008 12:31 UTC Re: Volume (price) calculations don't appear trustworthy By: kaldosh on Wed, 09 September 2009 10:26 UTC Re: Volume (price) calculations don't appear trustworthy By: Tommy_2Tall on Wed, 09 September 2009 11:04 UTC Re: Volume (price) calculations don't appear trustworthy By: chris89 on Wed, 21 October 2009 18:20 UTC
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