Heavy Duty Pattern Sewing Machine Conversion
The majority of programmable pattern sewing machines have been designed to cope with a very wide variety of sewn items from foundation garments to seatbelts. This means that at the heavy duty end of the spectrum they are incapable of holding and moving the work securely and rigidly. If a machine has a stitch resolution of 0.2mm or better, and the work is able to move more than this amount during the sewing cycle; this means the specified resolution is meaningless and the sewing pattern will not replicate the programmed pattern. The machine seen here has been modified by fitting a highly stable and rigid X Y system. Y direction movement is driven by double push/pull shafts which are mechanically linked. The Y movement bar is fitted with a linear guide mounted horizontally to ensure maximum strength and durability. An extra heavy duty clamping system is fitted which features an adjustable 2 step operation.
	The clamp Y movement on most machines of this size is actuated by a single centrally placed push/pull bar. This results in a considerable ammount play in the sewing clamp. This machine uses double push/pull Y movement shafts, widely and equally spaced about the machine centre line. Both shafts are driven and mechanically linked. The result is an almost totally rigid clamp mounting assembly. The Clamp movement bar is fitted with a linear guide. The guide is mounted horizontally for maximum strength and durability. The linear guide is coupled to the clamp arm with 2 widely spaced guide blocks. The clamp lift mechanism has a unique, 3 cylinder, positive stop, adjustable, 2 step operation. This feature allows the most accurate work positioning possible.

<back to Shoe Machines