Juki 1541S Stitch Loop when making 90 degree turn

[Captjoey]

Sorry reposting since it posted in the wrong place.

The machine I sew on at work is a Consew 206RB-5.  The person who worked on my machine is a traveling repairman who works on the ones at work. (No local repair shop here in Wilmington, NC) Loop happens on left and right turns. Also it is actually the stitch that you stop on that is looping not the next one. I will attempt to make a video soon of the process top and bottom to better help.  Stay Tuned !!

Thanks

CaptJoey

[kgg]

Out of curiosity have you tried not to raise the needle the 1/4 " before lifting the feet but having the needle buried deeper so you can just clear the material. The reason I ask is that with so materials, the bottom layer of material can sometimes be sucked/pushed down under the feet dog slightly depending on the material, how aggressive the feed dog is, how high the feed dog is set and how much pressure the foot is applying to the material. This with the material being twisted may cause the thread to catch slightly. An example of this would be thick ripstop on top and say a terry type material on the bottom. The terry will definitely get sucked in slightly. 

[Captjoey]

On 1/17/2019 at 8:19 AM, kgg said:

Out of curiosity have you tried not to raise the needle the 1/4 " before lifting the feet but having the needle buried deeper so you can just clear the material. The reason I ask is that with so materials, the bottom layer of material can sometimes be sucked/pushed down under the feet dog slightly depending on the material, how aggressive the feed dog is, how high the feed dog is set and how much pressure the foot is applying to the material. This with the material being twisted may cause the thread to catch slightly. An example of this would be thick ripstop on top and say a terry type material on the bottom. The terry will definitely get sucked in slightly. 

Thanks but I have tried everything between just barely raising the needle (to avoid skipping a stitch) and raising it as high as possibel.  Same result.

 

[Captjoey]

took some video but can't get it into a small enough file to upload herer. I will try putting on youtube later and posting link.

[Wizcrafts]

On 1/15/2019 at 5:31 PM, Captjoey said:

When I make a 90 turn I get a loop on the next stitch on the bottom side.

 

On 1/15/2019 at 5:31 PM, Captjoey said:

Photos are under side of material sewing

I think the previous responders were thinking that the loops were on the top side. The OP stated that the loops are the bobbin side, not the top. Let's assume this is a fact.

If the bobbin thread forms a loop under the material, the bobbin might be inserted so that it's feeding the wrong way, or the anti-backlash spring is missing, or the bobbin tension spring may be too loose. All of these, but especially a missing anti-backlash spring can allow the bobbin thread to continue feeding when you stop suddenly.

[brmax]

It sure is tough one!  I am trying to come up with how some extra thread can get out  there, I mean with the case tension spring doing its job. Additionally only noticable after a corner, ya this ones a

So if the last three stitchs are made in a slow process, Im wondering.

Though I still have faith in that case tension springs only letting out whats regulated on the hooks pull.

Good day

Floyd

 

[Wizcrafts]

35 minutes ago, brmax said:

It sure is tough one!  I am trying to come up with how some extra thread can get out  there, I mean with the case tension spring doing its job. Additionally only noticable after a corner, ya this ones a

So if the last three stitchs are made in a slow process, Im wondering.

Though I still have faith in that case tension springs only letting out whats regulated on the hooks pull.

Good day

Floyd

 

If the bobbin anti-backlash spring is missing, AND if the bobbin is inserted so it feeds in the same direction as the shuttle is rotating, AND the bobbin tension is a little on the loose side, extra thread can be pulled out when the OP makes a right angle turn. Personally, I would tighten the bobbin tension, then balance the knots with more top tension, then pull the bobbin out and turn it over so it feeds against the rotation of the shuttle. I've been know to do weird shit like that.

[Captjoey]

I will play with the bobbin tention today and see if that helps.  I am leaning toward boxing the machine up and shipping it somewhere.  Since I am in NC maybe this place. https://www.billsewing.com/ They are a Juki Dealer.  But I am open to sugestions if someone has a better place

[brmax]

Ok,  keep us in the loop of your results. The bobbin cases are likely to have a bluish flat spring in it, as the anti spin part. Most do yet they can be purchased without. So this could be optional and of interest.  Also some of these cases could be purchased extra as a real benefit later on, this you likely know.

 

Good day

Floyd