User:Dorkmo/Builds/CircularKnitic
< User:Dorkmo | Builds
Attempting to build a OSE CircularKnitic v18.03 machine. Updating the design files along the way.
Contents
- 1 BOM
- 2 Build Log
- 2.1 March 23, 2019
- 2.2 March 10, 2019
- 2.3 March 9, 2019
- 2.4 March 3, 2019
- 2.5 March 2, 2019
- 2.6 February 28, 2019
- 2.7 February 23, 2019
- 2.8 February 19, 2019
- 2.9 February 15, 2019
- 2.10 February 10, 2019
- 2.11 Febraury 9, 2019
- 2.12 January 2019
- 2.13 December 2018
- 2.14 November 2018
- 2.15 May 27, 2018
- 2.16 May 22, 2018
- 2.17 May 1, 2018
- 2.18 April 2018
BOM
Tools
Nuts & Bolts
- M3 x 25 - Fastenal
- M3 x 20 - Fastenal
- M3 x 12 - Fastenal
- M3 x 10 - Fastenal
- Square Nuts M3 - Fastenal
- M2 x 12 - Fastenal
- M2 Nuts
Bearings
Electronics
- https://www.mouser.com/ProductDetail/Cosel/PBA75F-12-N?qs=7%252b9h8EK%252bkyuJ0545jeaWQA%3D%3D
- https://store.arduino.cc/usa/arduino-motor-shield-rev3
- https://store.arduino.cc/usa/arduino-uno-rev3
Stepper - PKP243D08A2 - Oriental Motor
Build Log
March 23, 2019
- changed how the aluminum angle is mounted to the mountain
- incrased the thickness of the p4 yard holder base
- still trying to get the end of the groove to transition smoothly to pPspace
March 10, 2019
- Updating OSE_CircularKnitic_v18.03#To_Do list based on notes from this build
- Going to start build of larger diameter machine with these updates
- Documenting here User:Dorkmo/Builds/CircularKnitic-Grande
March 9, 2019
- think it might be good to use Flat socket cap screws so that the the head doesnt protrude and block the removal of plates
March 3, 2019
- Noticed that the mountain shelf didnt seem to fit perfectly
- measured cut plates from sculpteo, theyre measure at about 0.134inch / 3.40mm. A little bit thicker than 1/8" (0.125)inch.
- i think this may have caused a little bit of the seperation under the mountain
- by sandwiching the mountain wings i think this will make it more tolerant of imperfect measurements of plates
March 2, 2019
- I had these motors for something else and decided to use them, but i think they might be overkill
- Arduino Motor Shield seems to be overheating when connected to one, acting sporadically
- Steppers are rated at 1.5amp per phase, Motor Shield rated at 2amp per channel, but no active cooling
- As a stopgap solution i stacked 4 Motor Shields, and pointed a fan at the stack. (Sounds like competitive CPU Overclocking, but for motor sheilds, lol)
- ran 1 phase off of each of the two bi-polar motors to its own motor shield
- Seems to be able to run continously now
- used paperclips for weighing down threads
- bent a paperclip in half, creating a hook on each end
- hang smaller side off of thread
- connected two of the paperclips to an unaltered paperclp, then added about 4 more.
- connected all of the bottom clips to a keychain ring
- placed a plastic bowl in the center, filled a plastic bag with water, placed in bowl
- While running, it seems that occasionally a loop will not come up to the top of the needle as it moves down
- This causes the loop to prevent the latch from opening, then it seems to skip the next loop
- Not sure if this is being caused by the loose fit of c2 and c3 (large c2gap), or that p4 needs to be adjusted
- in turn if p4 needs to adjust i think the travel of the needle pushdown will also need to inscrease
- Or perhaps more tension before feeder thread?
- In the video below you can see a few places where the output looks pinched
February 28, 2019
- Got steppers running
- using the arduino motor driver, i dont think it can microstep so its a bit jerky it seems
- probably could slow down a little
- also noticing that the gap between the cut plates and the wall could be smaller
- Casted on for the first time
- did pretty good for a few rounds but started to miss a few needles
- the thread bunched up on the yarn holders, i think more weight is needed to pull down
- tried using a series of paperclips to attach weights. used a cordless drill as a weight
- seemed to work, but diameter seems to shrink as it lowers, need to maintain width
- will test different layouts
February 23, 2019
- Got most of the mechanical parts assembled
- Still need to build a weight and paperclip system to pull down
- ended up using 1x1" square aluminum tubing for base support, seems pretty good
- Need to figure out stepper driver setup
- Using arduino and a sparkfun AutoDriver
February 19, 2019
- Got parts in from 3Dhubs and Sculpteo. Everything looks good.
- Should get bearings and bolts later this week.
- Discovered an obvious bug with the current design.
- Needle unable to slide easily into slots
- Thankfully can twist into position on this print. Will use. But also tweak design for future prints.
- Need to raise/trim the top of groove on p3, or cut into base a little bit
February 15, 2019
- I mistakenly assumed 5x10x4 metric bearings (MR105) would be easy to find
- I already ordered 3D prints so im married to this size for now
- McMaster only carries expensive stainless version of this size
- Some available on amazon but they all seem dodgy, will save for last resort
- Will contact local bearing shop to see if they can order in
- Went ahead and ordered from MiSUMi
February 10, 2019
- Ordred 3D printed parts from 3Dhubs.com
- very little control over print settings
- Possible that parts will have sizing issues without being able to measure between prints
Febraury 9, 2019
- ordered laser cut parts from Sculpteo.com
- Their maximum thickness available is 1/8" or ~3.175mm.
- This is thinner than the original machine's 5mm and 6mm parts
- Taking a chance and hoping this wont be a problem structurally
January 2019
- tweaked variables so that laser cut parts will fit within 380mm width.
- This seems to be an industry standard for smaller plastic stock sheets?
December 2018
- Got design in working order, begin cleaning up issues/bugs
November 2018
- Contacted Mar from CirularKnitic
- Retstarted design work
May 27, 2018
- going to make the outside diameter for p3 about 1,000mm so that it will fit within 4 feet.
- The "Mountain" part didnt like being generated for a largr diameter machine. going to have to go back a tweak a couple things.
- looking at polycarbonate prices, seems steel is almost the same price per volume.
- will probably be easier to find a steel plate laser cutter machine shop
- thinking im going to use steel where they used polycarbonate sheets.
May 22, 2018
- getting close to finishing up variable formulas that need to be calculated based on needle dimensions
- part3 "p3" rendering incorrectly.
- diameter not expanding to accomidate more needles
May 1, 2018
- Recieved needles in the mail
- used digital calipers to take measurements
- Documented here OSE_CircularKnitic_v18.03#CKneedleVars-KH260.scad
April 2018
ordered some needles from this hong kong website http://shop.sckmcl.com.hk/product_info.php?products_id=136
- KH260 for Brother Knitting Machine Main Bed Needles 413426001
- might try using 360 needles. sounds like a nice number to shoot for.
