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Examples of single-needle machines where the thread groove does not face left are Singer 17W15 308-stitch or Singer 69 bar tack. The thread groove most often faces the bobbin, but not always in the case of a Horizontal Rotary Hook, such as Singer 201-2. Read the manual, if the needle does not pick up the bobbin thread, it may not be installed correctly. 

Take a cone of thread and place it on the thread stand. Route the thread upward through the guide at the top of the stand and then to the pre-tension thread guide on top of the arm of the machine. [Figure 6-80]  Most modern machines use a similar method of threading. However, there may be additional thread guides of different shapes to route the thread through. This is why the rigger should have a copy of the operator’s manual for proper threading of each machine. 

Once the machine is threaded correctly, take a sample of material suitable for the type of machine, thread, and needle. Form several layers and place it under the presser foot. Lower the presser foot while holding the upper and lower threads securely to the rear of the presser foot. Turn the balance wheel again and run a few stitches by hand to see if the machine sews properly. If everything works as expected, turn the power on and begin sewing. If you are unfamiliar with this particular machine, begin slowly until you get the feel of the clutch and speed of the machine. The harder you push, the faster the machine runs. Some industrial machines are able to run very fast. This can intimidate many. If you need to slow the machine down, you can replace the pulley on the motor with one smaller pulley. A parts and repair shop will have or be able to order the pulley you need. Order the smallest 

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