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kh-940

KH-940 data transfer mechanism

kh-940 hardware Posted on Sat, June 25, 2016 08:11:51

The system to get the data transferred to the needles. At the left side the springs are visible. At the right side you can see the plates. In the mirror while moving the carriage, the plates can be seen moving.



Calibrating the selected needle

trouble shooting Posted on Thu, June 23, 2016 13:00:03

Problem: In KC position the carriage was pushed up. The needle was not set or released at the right time, resulting in wrong position.

Cause: after long use the solenoid casing needed oiling. Selecting the needles was asking too much force. the timer belt was exposed to too much force. After putting oil in, the needles functioned again, but the callibration was wrong.

Solution: at the right wheel for the timer belt there is on the axis a small metal half moon shaped stopper. Get this of and the wheel can be pushed up. This makes it slip over the cog wheel on the solenoid axis. By slipping it a position and check, you end up selected the needles again in the right way.

Keywords: KH-940, timer belt, rotary encoder, needle selection, callibration.



Selection of needles problem

trouble shooting Posted on Thu, June 23, 2016 12:42:34

After lot’s of knitting with the memory (Teensy3.1) the setting of needles was becoming heavy, difficult, impossible.

Problem: putting oil in the solenoids casing.
Solution: WD40, spraying in this casing.

Problem resulting from the needles getting more and more difficult:
the setting of the needle, pushing it down at the right moment was lost.
The carriage was pushed up.
Solution: see post about callibrating the solenoid position.



Skip Stitch Sensor

knittings Posted on Thu, May 26, 2016 14:17:43

Conductive thread:
Elinox PS30035

Brother Skip Stitch Pattern:
number 324 (Stitch World book)
7 times = 28 tours + 5 tours cast-on (double E-wrap)- 5 tours cast off

Resistance:
unpredictable due to type of conductive thread when knitted.

Knitted
using Teensy3.1, private software, with Brother patterns in code



Tuck Sensor

knittings Posted on Thu, May 26, 2016 12:56:51

Conductive thread
PES HT 1100 + VN 60 400 t S/Z

Brother Tuck pattern
number 232 (Stitch World book)
2 times = 32 tours

Resistance
500-900 Ohm pressed
1100-1500 Ohm not pressed

Knitted
using Teensy3.1, private software, with Brother patterns in code



Swatch 2016

knittings Posted on Sun, May 15, 2016 22:02:27

http://etextile-summercamp.org/swatch-exchange/tiny-knittings/



KH-940 with electronics inside

electronics Posted on Tue, May 10, 2016 18:35:00

After months of this situation:

Finally:

With IR remote, LCD screen, a connection to the Neopixel LEDstrip, and wires to a free analog PIN, for connecting a sensor.
The laptop can be connected sending images (my own software).
Stand alone: some of the KH-940 patterns are already inside, more wil be uploaded.
Microcontroller Teensy 3.1



Lace Knit Swatch

knittings Posted on Sun, May 08, 2016 16:20:04


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