and also having a pair of lines coupling to switch 112 this switch 112 is operated from a cam 114 associated with the cam shaft 12 the cam 114 operates similarly to the cam 44a described previously in connection with fig4 with the embodiment of fig1 the switch 112 is intermittently operated from the high point of the cam to deactivate the clutch mechanism and essentially intermittently interrupt the drive to the feed roll shaft 38 this intermittent interruption of course also interrupts the drive to the shaft 40 and for a brief period of time the wire feed ceases this camming action to cease feed is synchronized by proper placement of the cam and associated switch so that this intermittent interruption occurs at the minimum or about the minimum speed of the feed rollers again reference is made to fig9 and the point or area x wherein the camming would occur to operate the declutch mechanism 110 fig1 is a side elevation view of an alternate embodiment of the machine wherein the cam shaft is supported in a manner where it can be easily removed from the machine or where at least the cam hubs themselves can be easily withdrawn off of the cam shaft in fig1 14 like reference characters identify like components previously described in connection with fig1 10 thus there is shown in fig1 a cam shaft 12 and a drive shaft.