pfaff 545-H3-6/01 CSMN

[VinnyK]

checked the clutchmotor and it runs at 1420 RPM

thats gonna be a bit extreme for me so i ordered a smaller pulley and see if thats gonna be enough

gonna be a big difference hopefully as there was a big one on there.

[VinnyK]

cleaned up the machine. oiled it. took apart the tensionplate cleaned and polished everything and put it back together.

set up the treads and tried sewing and sadly it jammed. 1 stitch and it gets stuck. i turn the wheel a bit back 

and then i can pull back the material and i have 4 threads coming out so thats not right.

if anybody has handy vids. tips. or hints i appreciate sharing them.

i geusse im gonna need to adjust it and set it up right. ill go check the manual and see if i can find the problem there 

[fibersport]

You'll see a difference, assuming you ordered a 45mm?  Don't forget you'll also probably need a smaller belt too.

Check your safety clutch on the machine to see if it was tripped, that was the problem with mine when i bought it.  

[friquant]

8 minutes ago, VinnyK said:

set up the treads and tried sewing and sadly it jammed. 1 stitch and it gets stuck. i turn the wheel a bit back 

and then i can pull back the material and i have 4 threads coming out so thats not right.

if anybody has handy vids. tips. or hints i appreciate sharing them.

 

For industrial machines, this start/end sequence works for me:

1. Start each seam with the take up lever at its highest position. (Otherwise thread yanked from your fingers)
2. Hold the top thread for the first couple of stitches (Otherwise thread jams)
3. Finish each seam with the take up lever at its highest position. (This locks the final stitch and allows you to pull the material away from the hook)

 

[friquant]

20 minutes ago, VinnyK said:

checked the clutchmotor and it runs at 1420 RPM

thats gonna be a bit extreme for me so i ordered a smaller pulley and see if thats gonna be enough

Have you oiled up the slide on the clutch motor so it doesn't stick?

And short stitch length is your friend when learning a clutch motor. Won't run away so fast

 You can also replace the handwheel with a 300mm pulley  🎡  😀

[VinnyK]

10 minutes ago, fibersport said:

You'll see a difference, assuming you ordered a 45mm?  Don't forget you'll also probably need a smaller belt too.

Check your safety clutch on the machine to see if it was tripped, that was the problem with mine when i bought it.  

i dont have the machine running i was turning it by hand to check if it would sew right.

im stil waiting for the new pulley before i can get it running with the motor. i checked the safety clutch that was all good

and yes good idea to look for a new belt especially with the smaller pulley smart thinking thank you.

yup i believe i ordered the 45mm pulley

[VinnyK]

7 minutes ago, friquant said:

 

For industrial machines, this start/end sequence works for me:

1. Start each seam with the take up lever at its highest position. (Otherwise thread yanked from your fingers)
2. Hold the top thread for the first couple of stitches (Otherwise thread jams)
3. Finish each seam with the take up lever at its highest position. (This locks the final stitch and allows you to pull the material away from the hook)

 

good thinking. ive been raised with a servo motor 😆 sure i always hold on to the ends of the tread. but the needle was always in the up or down position.

with the clutch motor ill need to keep my eye on that i geusse. good tip. ill keep my eye on that.

i have been looking for a bigger handwheel pulley but didnt find any.

so ill keep looking and see if i can find one for this machine. thats would help slowing it down to.

[friquant]

1 hour ago, VinnyK said:

i have been looking for a bigger handwheel pulley but didnt find any.

so ill keep looking and see if i can find one for this machine. thats would help slowing it down to.

For mine, I removed the hand wheel, measured the diameter of the arm shaft, and ordered a generic pulley (300mm diameter) to fit that size shaft.

[friquant]

1 hour ago, VinnyK said:

im stil waiting for the new pulley before i can get it running with the motor.

Unfortunately, in gearing the machine down we reduce the mechanical impedance that the clutch motor sees. That is, it will be harder to feather the clutch once it is geared down because the motor will have an easier time bringing the machine head up to speed. 

That said, now is a great time to practice feathering the clutch if you're game. And to make sure the clutch slide linkage is good and lubed so there's no hysteresis.

 

[VinnyK]

4 hours ago, friquant said:

Unfortunately, in gearing the machine down we reduce the mechanical impedance that the clutch motor sees. That is, it will be harder to feather the clutch once it is geared down because the motor will have an easier time bringing the machine head up to speed. 

That said, now is a great time to practice feathering the clutch if you're game. And to make sure the clutch slide linkage is good and lubed so there's no hysteresis.

 

good plan. i believe the axle of the handwheel is 12mm but ill take it of and measure it out and see what i can find.

yeah ill learn the work the clutch. it takes time but also cool to learn. easy system for sewing machines instead of the servo motors

stil have not found the problem with the tread jamming. see allot of videos, but either they show nothing or extremely to much XD