10/11/2019 Lobo Solitario Forum Embroidery
Hello, At the request of my father who wanted him that I embroider an Alaskan wolf, I take this opportunity to share my digitizing with you. For now, only available in PES format, other formats will follow when I have time to have fun all do. Feel free to post yourphotos of this embroidered wolfI. You look dgml DGML embroidery of 14 Lobosolitario Tajima T to Strand7. CrossOver Forums: the place to discuss running Windows applications on Mac.
Hi.I need your help about our cnc zone embroidery project work.I am trying to run embroidery machine using a continuous mode motor for needle movements, using a stepper motor. For optimum results I will test, if is possible to combine Spindle mode for continuous rotation and A axis mode for homing and stop motor in needle upper position. Work mode will set in Single BLK for run line by line, I need to explore if sequence, synchronicity and speed is than we need for this project.I will use two rotary shutters in embroidery machine rotor shaft. First shutter will be aligned at 0 degree of rotation will be for homing spindle motor in upper needle position, using A axis mode. Hi BR549.Thanks for your post.I think that this is not a very interesting project for this forum. In fact embroidery is too far of milling or turning.
Also embroidery technology is very well hiding for builders. I have looked hundred of patents looking for information, but only general information is there. When Khalid’s free his Embroidery Gcode Generator software, I made some embroidery test using my CNC router and my wife’s sewing machine and was possible to do some small embroidery tests.
Now I have last actualized version of program.In my first embroidery test, I ran a embroidery gcode file generated by last updated version of this software and controlled for Mach 3. In this moment rate was more and less 150 Stitches/minute. I thing that if is possible run a continuous motor, synchronizing motor rotation and horizontal translation, then is possible increase Stitches x minute, like computerized embroidery machines that runs over 600SPM.Some linksDIY Computerized embroidery machine, Peru 2006.Link to Lobo Solitario Spanish forum for building an embroidery machineLink in CNC ZONE for embroidery machine buldingHope you can give me a hand in this work.Thanks in advance.Rene. Hi Tweakie.CNC,Sorry, I was trying to express that Embroidery Job is an speciality a lot different to Milling Jobs, relative to kind of materials, work enviroment, ecc, about CNC is very interesting, and I think that a little more complicated that milling, because it will be synchronized some activities in short period of time (5-6 times/second o more).Hope this theme calls people like you with interest in develop a more accurate mode to run a g code for embroidery.Thanks for your post.Sorry my bad english and if some words can be misunderstood.RegardsRene. OK what was it about the Gocde method that you did not like???The gcode method is the practical approach at this point.
With fast and powerfull SERVOs you would be able to get some speed.I have reveiwed the basic process and I don't see how mach could do it useng macros and getting any speed out of it. Far to many problems to overcome in Gcode/VBNOW it may be possible by doing it in a plugin in C as you are not limited to the 10hz looptime. You should be able to sample at kernal speedJust a thought.
Hi,I stopped temporary build of my embroider structure because I was busy in work, think to re begin this weekend.I think to finish my embroidery structure soon, build/buy a embroidery foot press, cnc cut a new hoop and do new test to see what is the new real SPM than we can get in this configuration. Accord my calculus, my SPM were 100-125.
Using new structure will be too fast, but I think that never above 300SPM.Iam waiting my new controller from Hobby CNC, to make test in home, workshop is in my garage and is hot and dirty.Iam doing a lot of info researching about move needle using a DC motor. I think than never we get a considerable Stitches per minute using a stepper, because are a big quantity of consecutive lines than mach must process.
I asked in Mach 3 forum, and there give me some important advices.I think than obligatorily, we must go in direction to use a DC/AC motor to move needle, now the problem is how to get sequence. Things than I have in mind are.1a-Use a DC motor to move needle, start it using a M3 command like a spindle. We need to know if embroidery machines do variations in motor velocity accord to stitch length. In this case are necessary some calculus to determine the equations to send speed to motor accord to next stitch length.
I am working in this table. I was looking two videos from You Tube and in one seems like needle velocity are stable, and in other seems that are speed variations in function of hoop movement.1b-If embroidery machines always use the same needle movement velocity, and then we need to try and find what can be our max velocity. This always is in function of max speed than we can get in hoop movement. We should calculate needle motor velocity in dependence of time elapsed to move hoop in max length line selected. For this we should take in consideration, than time elapsed in one max distance hoop movement is 40% of time for one needle operation,(we must remember that this is the time than needle is above embroidery table). These parameters will give us our maximum Stitches per minute, because we need to reduce needle velocity until we get a hoop movement for a max distance (example. 7 mm), in time used for needle to get out of fabric, elevate and descend to 5mm above fabric.
If hoop movement is slow then we will get a 200 SPM embroidery machine and if is fast we can get a 500 SPM embroidery machine.2-How we can get this? Rene:Thank you for the interesting update. There is more to this project than I first thought.Khalid:Does your DST to g-code conversion create more g-code x-y moves compared to DST x-y moves? Or is the g-code overhead mainly due to Z-axis processing. In other words, Rene's research suggests that there are too many consecutive g-code lines for Mach to process for the Z-axis and thus slow down the SPM. Does this make g-code usage ill suited for our DIY embroidery machine?To All:I would guess that the sewing wheel needs to be running continously during the embroidery phase for maximum SPM capability.
This would only require a wheel speed control (e.g. Use spindle speed parameter?). The hoop must be controlled to move during the 'safe height' of the needle but we must not stop the sewing wheel. Hence the requirement for needle position detection so that synchronicity is maintained like a cam design. If the hoop can move too fast such that the needle or thread can break because of thread tension being to tight, then we need a thread tension control of some sort. It would also be necessary to have a sensor to detect a broken needle or thread (or both?).
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If this is too complicated then we are left with a low SPM, i.e. Such that the needle or thread does not break.It may be useful to collect the criteria required for the hardware design. Like thread tension control, thread breakage sensor, needle position sensor, and then the required interface to MACH software (spindle RPM, M-codes required, etc). I guess I'm looking more toward a feasability overview since Khalid is convinced that g-code and Mach was doable for good quality embroidery. Rene seems to have some reservations about some aspects of the concept - well at least for the Z-axis control and prefers to use a DC/AC motor for needle wheel control.
I'm in a position of uncertainty due to unknown hardware requirements to make this work for a high quality DIY embroidery machine. I would sacrifice SPM rather than stitch quality. Hi, answering KOC questionsKOCDoes your DST to g-code conversion create more g-code x-y moves compared to DST x-y moves?
Or is the g-code overhead mainly due to Z-axis processing. In other words, Rene's research suggests that there are too many consecutive g-code lines for Mach to process for the Z-axis and thus slow down the SPM.R- ANSWERIn our actual embroidery work we need to make pauses in needle movement, Z for one revolution takes two code lines and a macro line, motor should stop and start again loosing sequence, all this is against a good thread tension control. In each Z moves stepper must start-accelerate-decrease acceleration-Stop and restarts again. Definitively it takes more time than runs a continuous rotating motor.KOCI would guess that the sewing wheel needs to be running continuously during the embroidery phase for maximum SPM capability. This would only require a wheel speed control (e.g. Hi Peter,Sorry to hear from you about broken download.
Do you know any better file sharing website? Just tell me i will share on that site?RegardsPeople ho.:wave:I'm from Mexico City.I've been following the thread, because I care.Sorry for my bad English. HelloWhen begins jump stitches between different embroidery objects, actually are some quantity of short stitches in max length of 7mm, to prevent needle bending or breaking and fabric deformation.
I too was looking into the Mach3 interface. I was thinking of designing a circuit that would give a pulse width equal to the needle 'safe height' period. Rene's needle position circuit sensor could be used as part of the circuit to generate this pulse width. Hence, this pulse width period will vary with the sewing wheel speed.My next concern was how to use this pulse to force Mach3 to execute one line of g-code, namely the next X-Y coordinate and then wait for the next pulse to occur. Do I use an OEM input to stop Mach3 during this pulse period? By 'single-stepping' Mach3 per input pulse, the sewing wheel will be synchronized with Mach3 g-code output and the pulse repetition rate would now become the stitches per second speed.(I realize that this question may be better asked in the Mach3 forum.).
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