Motor Parts
1. From the Menu item Motor Material, select the magnet material Y30 This is a standard Asian material that is roughly equivalent to Ceramic 5.
2. From the Menu item Metal Material, select the metal LCS1013. This is 1013 low carbon steel. It is the most common Asian steel used in loudspeakers.
3. We know from our vendor sheets that the standard magnet dimensions for a 40 Oz magnet are 140 OD x 20 TH x 75 ID. With these, we can estimate that our front and back plate OD should be roughly 10mm smaller in diameter if we are going to use a 10mm Frontplate. This means a Plate OD of 130 mm.
4. From the Frontplate Outside Dia. drop down box select 130.
5. From the Frontplate thickness drop down box select 10. (Notice that there are two parts with a 130mm OD because the thickness box shows both 8 and 10mm available.)
6. Click on the Voice Coil Active Label Information by running the mouse over the label and clicking when you see a highlight box appear. If you hold the mouse down you will see additional information about the voice coil design including a Recommended Front Plate Inside Diameter. The ID that it recommends is 54.4mm.
7. In Frontplate Inside Diameter type 54.4 (Or select it from the drop down box) <Enter>
8. Enter the dimensions that we already know for a 40 Oz magnet in the appropriate boxes under magnet (140 OD, 20 Thickness, 75 ID)
9. We already know that the OD of the metal parts will be 130 so from the Backplate Outside Dia. drop down box select 130 <Enter>
10. It is common to match the plate thickness so select 10mm for the Backplate thickness. <Enter>
11. The gap between Pole OD and Voice Coil ID is typically set by the manufacturer to allow clearance for production and a small amount of yaw at high levels. The Standard amount usually runs about .3mm on this size coil so the Pole OD should be .6mm smaller then the Voice Coil ID. This would be 48.95mm. Enter this value for Pole Diameter. <Enter>
12. For now we will leave the pole extension at the default of 0.
13. Using the drop down box on Vent hole diameter select 25mm <Enter>
14. The motor design should now be complete and you can go to the Motor Parts Active Label for more information including Bg. You can also see the percentage saturation for the metal parts by pressing the colored bars under each part.