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A motorized knife sharpener and related methods of sharpening knives, wherein the knife sharpener is capable of sharpening knives of varying types and styles. The motorized knife sharpener includes a housing, motorized grinding assembly and an adjustable blade guide assembly. The adjustable blade gu

A motorized knife sharpener and related methods of sharpening knives, wherein the knife sharpener is capable of sharpening knives of varying types and styles. The motorized knife sharpener includes a housing, motorized grinding assembly and an adjustable blade guide assembly. The adjustable blade guide assembly includes a selector switch accessible to a user on a front portion of the housing. With the selector switch, the user is able to selectively adjust a presentation angle defined by a blade guide relative to a grinding wheel. The selector switch is operably coupled to the blade guide with a cam assembly that pivots the blade guide with respect to the grinding wheel so as to vary the blade presentation angle.

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1. A knife sharpener, comprising: a housing including a front portion with a selector switch, the housing enclosing a grinding assembly, a pair of fixed guide members and an adjustable blade guide assembly, the adjustable blade guide assembly including at least one pair of guide members operably con

1. A knife sharpener, comprising: a housing including a front portion with a selector switch, the housing enclosing a grinding assembly, a pair of fixed guide members and an adjustable blade guide assembly, the adjustable blade guide assembly including at least one pair of guide members operably connected to the selector switch, wherein movement of the selector switch to a desired setting causes both guide members to pivot relative to the grinding assembly such that a blade presentation angle is selectively defined between both guide members and the grinding assembly, and wherein the pair of fixed guide members are fixed to define a constant blade angle between the grinding assembly and the fixed guide members. 2. The knife sharpener of claim 1, wherein the grinding assembly includes at least one grinding wheel, wherein movement of the selector switch to the desired setting adjusts the blade presentation angle defined between the grinding wheel and both guide members. 3. The knife sharpener of claim 2, wherein the grinding assembly includes at least two grinding wheels and the adjustable blade guide assembly includes at least two pairs of guide members, wherein movement of the selector switch to the desired setting causes each pair of guide members to pivot relative to their corresponding grinding wheel such that the blade angle is selectively defined between the pairs of guide members and their corresponding grinding wheel. 4. The knife sharpener of claim 3, wherein the grinding assembly includes a third grinding wheel and wherein the pair of fixed guide members define the constant blade angle between the third grinding wheel and the pair of fixed guide members. 5. The knife sharpener of claim 1, wherein the selector switch defines at least two angle settings, the angle settings corresponding to a blade thickness of a blade to be sharpened. 6. The knife sharpener of claim 1, wherein the selector switch and the at least one pair of guide members is operably connected with a cam assembly, the cam assembly including at least one pair of cam pockets, each cam pocket having an angled cam slot and wherein each guide member includes a support post, each guide member being operably connected to the corresponding cam pocket by insertion of the support post into the angled cam slot. 7. The knife sharpener of claim 6, wherein manipulation of the selector switch causes the cam assembly to rotate such that each support post slides within the corresponding angled cam slot, wherein each guide member is pivoted relative to the grinding assembly to vary the blade presentation angle. 8. The knife sharpener of claim 7, wherein the blade presentation angle is adjustable from 15° to 21° for a thin blade. 9. The knife sharpener of claim 7, wherein the blade presentation angle is adjustable from 17° to 23° for a medium-thickness blade. 10. The knife sharpener of claim 7, wherein the blade presentation angle is adjustable from 19° to 25° for a thick blade. 11. The knife sharpener of claim 7, wherein the selector switch is mounted within an elongated slot on the housing, and wherein movement of the selector switch comprises linear manipulation of the selector switch within the elongated housing. 12. A knife sharpener comprising: a housing enclosing a grinding assembly and an adjustable blade guide assembly; anda selector switch mounted through an elongated slot in the housing, the selector switch being operably coupled to the adjustable blade guide assembly for adjusting a blade presentation angle of a blade to be sharpened relative to the grinding assembly, the selector switch being linearly manipulated within the elongated slot to operate the adjustable blade guide assembly. 13. The knife sharpener of claim 12, wherein the adjustable blade guide assembly includes a cam assembly and at least one guide member, wherein linear manipulation of the selector switch within the elongated slot to a desired setting causes the cam assembly to rotate such that the guide member is pivoted relative to the grinding assembly to adjust the blade presentation angle. 14. The knife sharpener of claim 13, wherein the cam assembly includes at least one cam pocket including an angled cam slot and wherein the guide member includes a support post, the guide member being operably connected to the cam pocket by insertion of the support post into the angled cam slot. 15. The knife sharpener of claim 14, wherein rotation of the cam assembly causes the support post to slide within the angled cam slot to pivot the guide member relative to the grinding assembly to vary the blade presentation angle. 16. The knife sharpener of claim 12, wherein the selector switch has at least two blade settings defined along the elongated slot, the blade settings corresponding to a blade thickness of the blade to be sharpened. 17. A knife sharpener comprising: a grinding assembly;an adjustable blade guide assembly including a pair of guide members, the guide members being positioned on opposed sides of the grinding assembly; anda selector switch mounted within an elongated slot of a housing to which the adjustable blade guide assembly is mounted, the selector switch operably coupled to the adjustable blade guide assembly such that linear manipulation of the selector switch within the elongated slot simultaneously adjusts both guide members relative to the grinding assembly for varying a blade presentation angle of a blade to be sharpened relative to the grinding assembly. 18. The knife sharpener of claim 17, wherein the selector switch is linearly manipulated between at least two blade presentation angle settings. 19. The knife sharpener of claim 17, wherein the adjustable blade guide assembly includes a cam assembly, wherein linear manipulation of the selector switch within the elongated slot causes the cam assembly to rotate such that each guide member is simultaneously pivoted relative to the grinding assembly to adjust the blade presentation angle. 20. The knife sharpener of claim 17, wherein the grinding assembly includes at least two grinding wheels and the adjustable blade guide assembly includes at least two pairs of guide members, wherein linear manipulation of the selector switch within the elongated slot causes each pair of guide members to pivot relative to their corresponding grinding wheel such that the blade presentation angle is simultaneously defined between each pair of guide members and their corresponding grinding wheel.