Needle hits feed dog, Singer 153K103

[SaraJ]

I have a Singer 153K103. Sometimes when sewing, the needle changes position and hits the feed dog. When it does i have to adjust the needle in place by pushing the needle bar. After doing that it stays in place for a while but suddenly it hits the feed dog again... Why?

[kgg]

1 hour ago, SaraJ said:

I have a Singer 153K103. Sometimes when sewing, the needle changes position and hits the feed dog.

A couple of questions:

i) What size of thread are you using?

ii) What size of needle are you using?

iii) how thick of material are you trying to sew?

iv) Does it happen on straight runs or when doing curves?

kgg

[SaraJ]

Thread: Serafil 20

Needle: 135x17 180/24 

Material: 1 - 5 mm. 

Happens both on straight runs and in curves. No difference between thickness in materials.

/Sara 

[Wizcrafts]

@SaraJ

There is a possible explanation for your sideways needle bar motion. That could be caused by a loose or misadjusted L shaped bracket at the bottom of the head, on the left end. This bracket secures the needle bar, inside (aka: alternating/vibrating) foot bar and presser bar, keeping them aligned laterally. Here are two photos showing the wide and close=up view of the parts. My machine is a flatbed 111, but the mechanism is the same on your Singer 153. The screw secures the bracket. The hole in the bracket is wider than the screw. This lets it move to the right and left to set the clearance to a minimum, or maximum, as desired by the user. Try tightening it while pushing it to the right. But, don't let it bind the shafts. They must move freely, but without noticeably shifting to the right or left.