Posts tagged "Tradeoff"

Plasma Cutter?

Plasma Cutter
honker asked:


I’m in the market to purchase a Plasma Cutter.
Any suggestions where to see any tradeoff websites. What makes a good choice for purchasing the right make & Model.

g-code

5 comments
Posted by Ivan Irons - November 22, 2011 at 10:29 pm

Categories: Do It Yourself (DIY)   Tags: ,

Scheduling parallel CNC machines with time/cost trade-off considerations

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This digital document is a journal article from Computers and Operations Research, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
When the processing times of jobs are controllable, selected processing times affect both the manufacturing cost and the scheduling performance. A well-known example for such a case that this paper specifically deals with is the turning operation on a cnc machine. Manufacturing cost of a turning operation is a nonlinear convex function of its processing time. We also know that scheduling decisions are quite sensitive to the processing times. Therefore, this paper considers minimizing total manufacturing cost (F”1) and total completion time (F”2) objectives simultaneously on identical parallel CNC turning machines. Since decreasing processing time of a job increases its manufacturing cost, we cannot minimize both objectives at the same time, so the problem is to generate non-dominated solutions. We consider the problem of minimizing F”1 subject to a given F”2 level and give an effective formulation for the problem. For this problem, we prove some optimality properties which facilitated designing an efficient heuristic algorithm to generate approximate non-dominated solutions. Computational results show that proposed algorithm performs almost equal with the GAMS/MINOS commercial solver although it spends much less computation time.

Scheduling parallel CNC machines with time/cost trade-off considerations

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Posted by Ivan Irons - April 17, 2010 at 10:18 pm

Categories: CNC Links   Tags: , , , , ,

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