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Re: Arduino tachometer
#Tachometers_Encoders
Forgot to say, added in the Files section ref RELS data. See schematic for installing. Also you may need the Adafruit files loaded in the Arduino sketch. I have attached the ZIP?s Hope this helps Cheers John On Sat, 10 Feb 2024 at 05:47, John Lindo via <bechetboat=[email protected]> wrote: I have added an Arduino file Tach.ino? --
John |
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Re: Arduino tachometer
#Tachometers_Encoders
I have added an Arduino file Tach.ino?
I hope this helps? This is used in my RELS. Also see the schematics for wiring in. Cheers -- John |
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Re: Arduino tachometer
#Tachometers_Encoders
Jerry Trantow
I have implemented several tachometers in software but haven't implemented an arduino tach. I have installed several of the $15-$20 tach (RC-41) modules which are very simple to install if you just need a quick RPM display. I've been using one on my lathe spindle for a few years. I recently added a feedback loop for the spindle VFD and noticed the module speed is off by maybe 10-20% under 100RPM but gets better at higher speeds. Coding a tachometer can be a bit tricky if you require accuracy. It all depends on how many pulses you get per revolution and how fast it's spinning. One method is to count the period between tach pulses to calculate frequency/RPM. You use a timer interrupt that captures a high?resolution timer on the pulse. You need a little bit of logic to detect slow speeds which can wrap your timer. Usually you will low-pass filter these values to smooth out the RPM value. Some automotive tachometers/software use a multiple teeth system with?a missing tooth to provide multiple position and velocity estimates per revolution. My lathe uses a 240 pulse per revolution disk (60 teeth with quadrature pulses) for threading. LinuxCNC supports missing tooth encoders so I could remove a tooth and get absolute positioning (within 1.5 degrees) The software provides an instantaneous RPM that I low pass filter before display so it doesn't jump around. The lathe also has the RC-41 display with a 1 pulse per rev sensor that I used to set the spindle RPM when I was using a potentiometer to control the VFD. Recently, I removed the pot and control the VFD with linuxCNC. This is when I noticed the RC-41 wasn't very accurate <100RPM. On Fri, Feb 9, 2024 at 1:57?PM mike allen <animal@...> wrote: hey folks have any of ya made a tachometer using a Arduino ? I tried |
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#RELS Screwcutting
#RELS
Found this video in my archives
Screw cutting a 12 mm x 1mmm LH thread. Cross slide set so as the it moves well out off the part to gauge the size of the thread with a nut. Thread size pitch is not normal for a standard metric , Hope of interest? -- John |
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Re: #3D
#3D
Hi Ron. So sorry to read about your 3D problems. You are not alone in your Creality after service?? woes LOL I have a next?town down friend Eduardo who had the same service problems and he had to deal without success by emailing?China, As Eduardo does not speak Chinese LOL or any English, I tried to wade in, but had no success. His problem was the extruder working overtime, I think this was caused by the spool holder in the wrong position, it seemed to be initially set up parallel in line with the bed and not hanging?vertically above the extruder. Anyway, with some wire clothes hangers etc we got there and he is OK now, but inconsistent prints of poor quality, even printing with layers down to 0.2 mm. With a consistent problem then you can zoom in on a fault, with inconsistency?then pretty much to lap the Gods to know if you have a fix. As a newbie some 7 years now, I have found that Geeetech (and no endorsements) have given me? excellent service, excellent in answering questions, etc etc, and you pay for what you get. Just bought a second?Mizar (shipped from Geeetech Germany)? DHL 3 days?shipping , the total price was about $245. Geetech have slashed their prices, there seems to be a stagnanting Chinese financial crisis, Oh well.? Good for me LOL. Cheers John On Thu, 8 Feb 2024 at 12:53, Ron Y <ryulick@...> wrote:
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John |
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Re: #3D
#3D
Thanks Julian, I will let you know how the vise turns out. I think it will be strong enough to grip the odd wooden block for drilling or hand planning a few bits and bobs. Attached 2 photos?of my first?print off the Mizar using a Geetech?test STL supplied. Quite impressed, and for the price of these budget printers, IMHO well made, well designed, user friendly. I have not tried anything else but PLA at this moment. The vise was printed off the Prusa clone I3 using carbon filled filament, the nozzles wear out quickly, but the strength of carbon filled is about double the normal toy stuff PLA, Cheers John On Wed, 7 Feb 2024 at 19:48, Julian <julian@...> wrote: Love the cartoon characters. Often print novelties for the Grand Kids.? Last effort was a pair of very loud whistles each with their names embossed on them.? My daughter seems to be dead against me doing this, but the kids love them ... drum kit next! --
John |
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Re: #3D
#3D
Julian What a real nice looking machine, well done. John On Wed, 7 Feb 2024 at 17:38, Ralph Hulslander <rhulslander@...> wrote:
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John |
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Re: #3D
#3D
Forgot to add, in the Silvester photo it includes in the backdrop one of my house cats, and by pure coincidence he was on the table at the same time.
A beautiful cat, but curiosity will definitely be the end of him, LOL Cheers -- John |
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Re: #3D
#3D
Thanks Julian and guys.
I have always for past 7 years been a Geetech fan, bought my first Prusa clone I3 some 6 years ago and another 4 years ago.? never failed me, except for a few bits and pieces, which fortunately are available almost over the border from me in Germany, Geetechs have a hub there. Built a few electronic Arduino upgrades to control fan speeds, but the original Sanguinolou control board is still working Ok,? thank goodness as they re now impossible to find or even purchase. With a bit of good fortune, I sold one of my printers and have a Geeetech Mizar S. The extra 25% of bed volume of 255 mm x 255 mm x 260 mm compared to the i3 suits me and? this machine fits nicely into my very cramped workshop. From the original Geeetech clone Prusa to the Mizar S, is again like chalk and cheese. Automatic bed levelling is so easy and the magnetic bed plate means no more hair spray and first level adhesion problems. Early days yet, but as you say I am a happy camper. I recently read an article from All3DP that Bambu are doing a printer recall, what is the real facts do you know.? Attached a couple of photos of toys I produced for my neighbours kids Xmas gifts. Sylvester and of course Tweety pie Working on the Fractural vice currently see photo and seems to be going very well. All the above items mentioned were all download STL files from Prusa pintables. I normally design my own parts and print. But the toys land vice look and work so well, so cheating on the odd STL downloads can?t go amiss. The photo of the Fractural vice, not complete as I am waiting on more 3 mm cap head screws, they have to various but specific lengths and you need a zillion of them. But all 3D printing done is done . Cheers for now ?f -- John |
John Lindo
