var fDesc=new Array(); fDesc[0] = "Dividing Head Calculator is a simple program to help mechanical engineers and students.
Designed to help his father with the calculations to cut varying number of toothed wheels. All you need to do is enter a value for divisions and click the calculate button... Hey Presto you have all the details you require with the most efficient use of plate and turns.
Divisions = the number of divisions you require in the finished work piece.
Plate = the number of holes in the selected circle on the required dividing / indexing plate.
Turns = how many complete turns per division.
Holes = how many additional holes to rotate the head per division.
Degrees = how many degrees the work will rotate per division."; function tShowHide(id, show) { var s = document.getElementById("desc"); if ((s.innerHTML.length<=212 || show==1) && show!=2) { s.innerHTML = fDesc[id]; if (document.getElementById('m1')) document.getElementById('m1').style.display='none'; if (document.getElementById('m2')) document.getElementById('m2').style.display='none'; if (document.getElementById('more_txt')) document.getElementById('more_txt').style.display='inline'; } else { s.innerHTML = ''; } }