Dear Mr. Meeker and Femm group, We are currently working on different models for a holding magnet. The holding magnet should be a ringmagnet with axially magnetisation ( thru-the-hole magnetised ). We would be interested in the magnetic field as well as the force of the ringmagnet on a steel plate in a distance of 1-2mm. To calculate this configuration I downloaded FEMM program and think it is a very useful tool ! I have studied tutorial and manual and have drawn a layout of our problem, and also I think I set all configurations right, but when I want to rn the calculation I get an error, telling me that the problem couldn't be solved. Our problem should be able to be solved with FEMM, since it is an axisymmetric problem. However, I can only let FEMM solve it if I set problem-type to planar !? I have attached the FEMM file to this mail. If you could give me some assistance what I am doing wrong, then that would be very appreciated ! Thanks in advance and best regards, Reinhard Walter Elektronische Entwicklung Tel: +43 1 523 37 86 DW:664 OTTO BOCK Austria GmbH Fax: +43 1 523 22 64 Kaiserstr. 39 A-1070 Wien mailto: walter_r@xxxxxxxxxxx <<ringmagnet.FEM>>
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