Re: Rotary surface spedd in IPM for given diameter not equivilant to linear IPM speed
hy john sometimes rotary axis can be tricky
Say I am cutting out a square hole on the side of round tube. the hole traverses 180 degrees of the tube on the A axis and 1" on the X axis.
I have commanded the tool to cut at 20 IPM
when the tool travels along the X axis the code shows 20IPM and the machine moves at 20 IPM, but when it rotates it the code says something like 2291 IPM? it whips around way faster than 20IPM
x axis is behaving normally, it is a linear axis/default stuff, with no relation to the rota
but the rota alone seems to have it's own mind ... and this mind may get more complex when movement :
... involves synking the rota with one/or more linear axis
...... or
... rota is alone, and still behaving diferently, depending on static position of linear axis
if you run an okuma machine, i can help with formulas, otherwise it may be needed to discover them
patience is needed
a set of simple rotary movements with diffent feeds has to be created, then compared real vs simulation time, and after that see how it changes if linear axis changes; those results have to be analyzed
after that, code may involve simple rota + 1linear axis synking, and so on, add more and more, and keep a record of durations
in the simplest case, corelation is somehow linear, proportional, and should be easy to observe/guess for simple movements
you need to scale the toolpath and theoretical/estimated times, to be sure that programeed feed will be reached in reality, and also that you timing record deviation is small enough not to affect final results; for example :
... don't program a high feed for a short toolpath
... don't program a feed close to upper axis feed limit, thus take into consideration linear mm/min limit, and rota rpm limit
... don't program an estimated duration of 0.4 seconds, if your measuring accuracy is 0.5 seconds or more; if your measuring accuracy is 1 second, then target times of at least 30 seconds for example
if you wish, i can help you / sugest trial codes; once formulas will be found, i can help with an application that will automatiicaly scan your program & map feeds corectly / kindly
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