Wizcrafts

This is an ad for a machine for sale, so it has been moved to the appropriate section of sewing machines for sale

Uwe, the Mitzi it is a DU-105.

The Consew 206RB-5 is manually oiled and has a safety clutch that protects the hook in case of a thread jam in the shuttle. It is an excellent upholstery class walking foot machine.

I have never used a #90 needle in a walking foot machine. But, I also don't use thread thinner than #69/T70 bonded nylon. The standard needle size for this thread is #18/110. You didn't specify the size of thread you are using, but if a #90 is ratting it, chances are that a #110 will give a much better result.

Perhaps this video will help you decide if the Mitsubishi is right for you.

Check the entire thread path to see if there is any binding between the spool and eye of the needle. Sometimes thread is twisty and forms knots or tight loops that can get jammed as the thread tries to pass through a guide.

You should start buying 135x16 leather point needles. They are made with different shapes of points. I have slicing tapered chisel and diamond/triangle point leather needles. The slicing points cut a longer hole that is oval in shape with very sharp ends. This causes the ends of the thread to be submerged slightly and gives the appearance of shorter stitches than are actually being sewn. Diamond point needles let the thread lay on the surfaces and make the stitches appear longer, just like round point needles do. Then there are the right and left twist angled chisel points that can cause an offset of the stitches one way or the other (like hand sewing).

Those x17 needles are round, not leather point and may cause heat and grabbing problems. The ones you want are 135x16.

There are some significant differences between servo motors. The most commonly sold types in North America are spring loaded carbon brushes and brushless. The motors with brushes tend to have more torque at slower speeds than a similarly rated brushless motor that has the same pulley size. All that I have bought come with an extra pair of brushes. The brush servos I currently own all have speed controls via either a potentiometer or rotary multi-position switch. The brushless motor I have mounted under my Fortuna skiver has a two push button system for changing speed, direction and ramp up parameters (I hate this system!).

Aaron, it could be that your timing is retarded a bit. Check it out by following these few steps... Sew a few stitches in the normal direction, to lock the thread into the leather. Use about 6 stitches per inch (spi) Hand wheel until the needle reaches BDC (bottom dead center) and begins to rise and the top thread loop is just being picked off by the tip of the hook, then stop. Visually check the position of the take-up lever. It should be near the bottom of its travel. Continue watching the take-up lever as you slowly hand wheel the machine a small amount. Stop when the take-up lever is at its BDC position. Now look at the bobbin case/shuttle and note the position of the top thread that is passing around the case. If the top end to hook timing is spot on, the top thread should be half way around the shuttle and bobbin case with the take-up at the BDC position. If the take-up has not yet reached BDC, the timing is retarded. If it has passed BDC and started up, it is advanced. If the above is the case, the hook position needs to be fine tuned one way or the other until the top thread is half way around the shuttle with the take-up at BDC. Your machine is probably more forgiving in normal direction sewing than in reverse. Also, the longer the stitch length, the more critical the static timing becomes. If you need to retime the hook, do so with the stitch length lever in the zero feed position (only moves up and down, about halfway between forward and reverse stitching)

I currently use Family Sew FS-550 servo motors that I bought from Toledo Industrial Sewing Machines (now labeled FL-550). They are powerful and have a rotary switch that sets the top speed. This is really useful if you can't afford to make any stitch line mistakes by accidentally flooring the pedal. Both were specially retrofitted with very small pulleys that further reduce the top speed while multiplying the torque at all speeds. This is especially important if you dial down the max speed. Previously, I used Sew Pro 500GR servo motors which were great. However, a few years ago, that Chinese company closed with no warning.

I am using them in our 111w103 and they work perfectly. the stitch line is good and tight with a slight offset. I may also try them in one of my patchers, although those top feed machines really need titanium coated needles to counteract leather tape, contact cement and the inevitable lifting of soft leather and vinyl items I need to sew. For those who don't own a patcher these statements may seem curious. The machines called patchers are fed by the presser foot alone, which can be rotated through 360 degrees. There is a sometimes significant gap between the legs on the foot and a centered needle. Since there is nothing pressing down directly around the needle, soft materials and leather pucker as the needle makes its upward jog to form the loop for the hook to pick off. When the leather (material) puckers upwards the loop can decrease in size, often leading to skipped stitches. Counteracting this lifting/skipping problem is an ongoing fight for some patcher owners. As a rule, these machines sew more reliably into stiff leather than chap or garment leather. The saving grace when sewing on embroidered patches is the stiffness of the patch. This stabilizes the soft leather and lining in the vest or jacket and usually prevents skipped stitches. One can also counteract the lifting tendency by keeping liquid silicon in the wax pot that is usually present on the top of the patcher's body. Just make sure there is felt inside the pot, with holes punched to clear excess lube off the outgoing threads.

I use #69 for wallet interiors and then #92, or possibly #138, to combine them with the back (depending on total thickness). Since most of my wallets are as thin as possible, #92 thread is large enough to sew the back to the interior. I would say to try it with #92, using a #19 needle.

I fixed you email addy.

Jerry; Does your machine have a long torsion spring along the back, with a thumbscrew adjustable sliding block on the head side of it? If so, check that sliding block to see if somebody has added material to the top of it. The top of the block makes contact with a lever, which is what determines the amount of lift of the foot as you sew. The lift is increased by moving it towards the flywheel and decreased by moving it towards the head side. There needs to be a little clearance between the top of the block and the lever that lifts the foot.

I think that the Leather Machinery forum might be a better place to discuss laser cutters. If there are no objections, I will be happy to move this topic to that forum. What say you?

Here are the Google search results for the complete term: vintage sewing machines forum

This matter would be better brought up in a vintage sewing machines forum.

Just rotate the pressure screw until the presser bar frees up and drops. The hole in the screw is sometimes bored slightly off center. Oh those Chinese!!!

It uses any of the following leather point needle systems: 214X2, DDX2, or 328LR

That's nice work Brian.

Cowboy Bob has all the parts you'll need to get this thread release working again. I got parts for my 111w103 from Bob a few months ago and the machine is working like new again.

When you lift your presser feet, whether by hand or foot, or knee lever, the bracket on the back is supposed to push the rod to the front. There it is supposed to make contact with the bent steel tab on the backside of the upper tension assembly. When that tab is pushed forward, the top tension disks will separate enough to let the thread flow past the disks with minimal tension. This is the expected behavior when you want to remove the material, or pull through freshly loaded top thread.

Lower the feed dog so that just tops of the teeth are showing top of the throat plate during the transport cycle. They need to be very slightly above the plane of the throat plate, but not that high.

Back off the foot pressure screw! That is way too much downward pressure for that thickness and density of leather. You only need to apply enough foot pressure to prevent the material from lifting as the needle ascends.