Bullduke

cobra noise video.MOV

Gentlemen, So as expected, David at Leather Sewing Machine Co. has gone above and beyond. Honestly, I have never received customer service at this level. He simply just wants to make his customers happy and is willing to assist with sincerity. He wants to get the machine back so they can inspect. It seems to me there might be a tight bearing or bushing somewhere but I am no sewing machine mechanic. After more heavy oiling, I was able to get the machine to sew more smoothly. However, to get that top stitch loose loop out, I had to almost tighten bottom bobbin all the way. This as expected required more top tension. So, sewing with that much tension seemed to be adding more binding in the thread and sewing in general. David and I spoke in details about options. After looking at the leather weight I sew with Fire Department Front Shields, we decided it may be better to upgrade to the Class 4. It arrived yesterday and I started setting it up. This thing looks like a beast. Cant wait to get it up and sewing. Thank you all for your response to these forums. Your knowledge and suggestions helps so much when us armatures are working thru adjustments and tuning. Yes lets talk thread and needles for Turn Out Gear

Ill try to rotate the wheel with out the belt off and check to see if it wobbles. When sewing or turning the wheel you can feel how tight everything really is and the squeaking noise is present around that needle bar it seems? I did save the box and took several pictures of the second head that arrived damaged. LMC sending that new head was pretty amazing and I just knew I would be back up and sewing but cant believe two would be doing same thing? The first head was on a crate with the stand wrapped up really well so the box looked really good and protected from all the wrapping and stand. I think wizcrafts may be onto something with an internal part bent or damaged. Maybe there was a problem with a part during build process and both machines are suffering from it? Ill try the presser bar this morning that would be an easy test. The needle bar does seems to be the loudest and the oiling in that area did help some? Sense the oiling did improve some of the problem ill ask LMC about using a different oil today. Ive been on 24 hours shifts so today will be my first day back home with the machine. Ill reach back out to them and see if we can get some more progress and keep everyone posted. Thanks again for your responses I think both of you have given some really good suggestions and Ill have some focus today when working with LMC. The loose stitch issue has also been present from the beginning and drives me crazy because I cant get rid of it with tension adjustments?

Gentlemen thanks so much for your input. Yes I have removed the belt and the moaning is still happening. The attached video lets you see the internal mechanisms as the noise is occurring. You can even feel the resistance in the head unit when sewing and manually using the wheel with or without the belt on? My first head is starting to improve from the tapping of the shaft LMC had me try and multiple days of heaving oiling. The second head is still moaning and seems to be under some sort of bind internally. Yes this post is in no way meant to interfere with the good folks at LMC just looking for other suggestions and experience with solving the issues. I sent the post during off hours with LMC. Any suggestions on this loose stitch? I have adjusted the tension where the knot is in the middle of my leather and I am still getting these loose stitches randomly?

Hey Folks, So I am so excited to be a new owner of a Cobra class 26 but I have two problems. 1. I cant solve a problem with having one loose stitch during projects. I will adjust the tension and the knot is sitting in the middle and during a sewing run ill get one loose stitch almost every time? 2. The machine is in a terrible bind and making a squealing honking noise when sewing. The noise is still present when using the hand wheel with no thread loaded. I eliminated the thread to eliminate potential tension issue but the machine is so tight and seems to be in a bind? I've oiled heavily with some minor improvement. The problem has been so bad that the great people at Leather Sewing Machine Co. have even spent hours on the phone with me. They even had me making adjustments on the internal shaft from the wheel and inside shaft. They facetime me to watch the machine and we made some adjustments to the bottom bobbin. This seemed to have helped a tad but the machine feels to be under internal friction. David at LMC customer service was the best I've ever experienced and he talked with me on the phone and email throughout the diagnosis. He was so understanding and accommodating that he even sent me a new head this weekend; however , sadly the new head did the exact same thing???? The shipping box from UPS was pretty beaten up?? I don't know if shipping could be causing damage but both machines are under a bind somewhere. I have wanted one of these machines for years but I need anyone's help that may have experienced similar issues and fixes if possible. I'm so discouraged and exhausted I just want this beautiful machine to lay down a good stitch and not sound like squealing tank. Maybe a bad run of machines or shipping damage? Again, If you want a new sewing machine and not sure where to purchase? PURCHASE FROM LEATHER SEWING COMPANY because what they say about amazing customer service is absolutely TRUE. Hands down best service I've ever experienced and I owned a cowboy 3200 and Ryan was pretty dang great. This is mechanical issue not a personal one for sure! cobra noise video.MOV