Northmount

Moved your post to leather sewing machines. You are looking for a patcher. @Wizcrafts has lots of experience with sewing patches and can tell you about it (and of course, lots about sewing machines).

Some databases don't index 3 or fewer letters words. Easy way to not index "the" and many other articles reducing the amount of space or keys required by non-essential words. Some DBs allow you to specify what gets dropped and what to keep.

Often times it is better not to tag onto an 8 year old post. Find the same forum and make a new thread with your post. Some pictures may be of great help too. Need to be able to see what you are describing. Our ESP doesn't reach that far

Use a Google search. Their indexing is better, and the servers are very fast. Use the following format: site: leatherworker.net vfd The site parameter restricts the search to a specific site. The search parameters like "VFD" follow the site parameter.

Locked and moved to old and sold archive for non-compliance.

Message @Johanna

Maybe for bracelets?

You need to quote the OP or tag the OP to be sure they are receiving notifications. Some members have shut off notifications. Tag by typing the @ symbol followed by the member's screen name and pick it from the popup box. Like this @Capnclive you have 2 comments to look at. Also you have not complied with @AlZilla request to update with shipping information, will you ship, where to (globally), who pays. If you fail to comply, I will, I will lock and archive your post.

Thank you.

Please post your photos here. 3rd party hosted photos frequently disappear due to changes in the host's policies, host out of business, users moving files, deleting files, closing their account or the account expiring. When this happens, the post becomes worthless to all future users who are researching or looking for help to solve a problem. Post your photos in jpg or png format. They display automatically. Many members will not download unknown files or file types. If your files are too large to post here due to file size restrictions, you need to resize your files to fit.

Moved your post to Dyes, Antiques, Stains, Glues, Waxes, Finishes and Conditioners. Check out vinegaroon in this forum, lots of posts and info. Note it is not a dye. It is a reaction between iron and tannins in the leather. So the leather needs to be vegetable tanned, and, any finish removed so the veinegaroon can soak in and do its chemical reaction.

You need to provide more information, like thread size and type, needle and awl sizes, and some pictures of the stitching from top and bottom sides showing examples. We may have some minde readers here, but I think they need your help.

May also depend on number of coils (magnetic poles). Did you measure with a dial gauge, or brace a pencil and bring it close to the pulley until it just touches some point on the side of the pulley rim while turning by hand, and also when running the motor? Tends to say the bearing may be damaged (possible broken or cracked outer race or deformed balls), or if the bearing is supported by spokes vs. machined full face like the video shows and 1 or more spoke is broken. This is definitely a mechanical issue (due to hearing and feeling grinding noise speed and belt tension changes). Reminds me off a vibration analysis job on a large cooling water pump. Driver was a steam turbine running around 7000 RPM. The story came together in pieces. You only get told what they think is relevant. The turbine had tripped on overspeed. They rebuilt the governor and put it back together. Now it had high vibration. They had a spare turbine rotor in storage so swapped it out. Still had high vibration. Then they called me. I took vibration measurements on the turbine, gear reduction box, and the pump. The pumps operating speed was about 500 rpm. The vibration on the high speed pinion shaft was approaching 100 in/sec, fantastically high and dangerous. (1 in/sec is bad.) I got out of there as quickly as I could while capturing the necessary vibration data. The vibration frequency spectrum showed peaks at the turbine speed and at the pump speed. The highest peak was at the pump speed. So I told them the pump / bull gear shaft was bent. They replaced the gear box. Still a problem. Told them they needed to check the run out on the pump shaft. Guess what, it was bent. Then comes the rest of the story. A board (slat) had fallen off the cooling tower and was sucked into the pump. Oh! that is interesting! The board had stalled the pump and broke up. The turbine governor had opened up wide open to bring the speed back up. As the board broke up, the turbine went overspeed and tripped before the governor could correct the speed. The board bent the pump shaft before the board broke up. The unit was about 1200 hp. Pump suction was about 20" or so diameter.

Try heating it up fairly hot. Often that will soften Loctite and other thread lockers (and many glues / adhesives).

I moved your post to leather sewing machines. You'll get more interest in this area. Have you looked through this forum? you will find a number of discussions about servo motors.