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Re: #LATHES Spindle Encoder Update #LATHES
Yes. The pins are 0,1 of the port identified by ENCODER_PORT. The mask will be 0x3 so only those two will be used. If they were pins 3,5 for example then the mask would be 0b00101000 or 0x28. And
By John Dammeyer · #751 ·
Re: #LATHES Spindle Encoder Update #LATHES
Thanks John and Jonathan, John ENCODER_PORT *&* ENCODER_MASK; would be mapped to the encoder pins? Remember I am a code hacker not a programmer meaning I sometimes can take others working code and
By Ralph Hulslander · #750 ·
Re: #LATHES Spindle Encoder Update #LATHES
Hey Ralph, I have been following your progress, interesting stuff! Here is the computer code that Clough42 published to match his series of ELS YouTube videos:
By Jonathan Mackenzie <jonathanmackenzie@...> · #749 ·
Re: #LATHES Spindle Encoder Update #LATHES
Hi Ralph, Set your code to interrupt on the edges of your encoder signals. Or if your processor has a quadrature encoder counter set up your interrupt to read the counter. For reading the two encoder
By John Dammeyer · #748 ·
Re: #LATHES Spindle Encoder Update #LATHES
I have not found any that just work! At best, if they show RPM they do not show the same rpm with a steady running motor. A few do not show anything. I do not "think" I need to be concerned with
By Ralph Hulslander · #747 ·
Re: #LATHES Spindle Encoder Update #LATHES
Ralph, Ah, I couldn't see that before. It looked like it was direct mounted. Good job! No, I don't have a program that will read the encoder, but it should be fairly simple. Are you concerned about
By CLevinski · #746 ·
Re: #LATHES Spindle Encoder Update #LATHES
John, I do not own a knee mill as mine is a bench top model. I had a similar problem on the Z axis and ended up using heavy duty air shocks which float the head/motor assembly. Now it takes a lot less
By Bob Pratl · #745 ·
Re: #LATHES Spindle Encoder Update #LATHES
Oh and I'm running 3:1 toothed from motor to knee handle. What I did was put vise, rotary table, faceplate and some metal onto the X table and then a torque wrench on the handle to see what was needed
By John Dammeyer · #744 ·
Re: #LATHES Spindle Encoder Update #LATHES
Gecko. https://www.geckodrive.com/g203v-digital-step-drive.html This is what I'm using on the knee of my mill. I started with the 3A driver and a 600 oz-in motor wired in series. The ELS was the power
By John Dammeyer · #743 ·
Re: #LATHES Spindle Encoder Update #LATHES
John, what driver is used for 7 amps? My Microstep Driver max is 4 amp. I do see a 7.5 amp driver on ebay
By Ralph Hulslander · #742 ·
Re: #LATHES Spindle Encoder Update #LATHES
My foundry is like my table saw, band saw and ELS driven lathe. It's a tool. In the case of the foundry I have a small ATMEL processor module, pre-dates Arduino, that does PWM drive to a treadmill
By John Dammeyer · #741 ·
Re: #LATHES Spindle Encoder Update #LATHES
Exactly my sentiments. I have a 3Nm driving 2:1 to a 3mm pitch screw and have no problems even though I am using an encoder! BTW I love your casting capability. I have no outside space suitable or I
By Richard <edelec@...> · #740 ·
Re: #LATHES Spindle Encoder Update #LATHES
Hi guys. The Z axis motor on my South Bend Heavy 10L with the 8 TPI lead screw is using the max 3A drive current from the internal micro-stepping driver inside my ELS. I found that 2:1 is more than
By John Dammeyer · #739 ·
Re: #LATHES Spindle Encoder Update #LATHES
Here is the encoder mounted. It is a AMT103 <https://www.cuidevices.com/product/resource/amt10.pdf>, it is mounted directly on the bearing block. [image: IMG_20200319_103112833.jpg] Charlie do you
By Ralph Hulslander · #738 ·
Re: #LATHES Spindle Encoder Update #LATHES
Hi, Ralph, I spent 33 years working for a company that manufactures shaft encoders, and part of my responsibilities included helping customers design them in to their application. One often overlooked
By CLevinski · #737 ·
Re: #LATHES Spindle Encoder Update #LATHES
Thanks Richard, In all of my reading there never was anything definitive said about sizing the stepper so that was my best guess, I thought they looked small. Luckily, I only have the prototype
By Ralph Hulslander · #736 ·
Re: #LATHES Spindle Encoder Update #LATHES
I feel that you are seriously underpowered. If using a 3Nm stepper I would run it at 2 to 1 or more with an 8tpi screw. Richard
By Richard <edelec@...> · #735 ·
Re: #LATHES Spindle Encoder Update #LATHES
That was a first try at getting something to at least hold the motor close to where it might go. I have other mounting ideas also. The leadscrew is ?¡±-8 Acme here is the stepper motor
By Ralph Hulslander · #734 ·
Re: #LATHES Spindle Encoder Update #LATHES
I should think so when you have it mounted on a bit of thin sheet! What Torque motor is that? and what pitch leadscrew? Richard
By Richard <edelec@...> · #733 ·
Re: #LATHES Spindle Encoder Update #LATHES
Overkill? I did not want to modify the spindle to add the encoder so I just matched the stock end gear. It took about 5 tries before I got the Urethane to buttfuse correctly. The seller said one could
By Ralph Hulslander · #732 ·