Відео

I don't know. I haven't seen anything like that offered for this sander.

It has a belt drive. I haven't used a metal lathe, but don't they use gears?

@@mheermance Old one's have belt drive and plain bearings, and can be quiet, more modern lathes have gears and roller bearings, that can get noisy once worn.

The Propeller chip has a serial port, but no add on cards were created for it.

@@mheermance i am trying to find if there is any way to add a SCSI bus, ISA back plane, or similar to it so i could add sound card, serial i/o, better GPU/VGA, tty/rtty modem, and maybe C64 cartridges or similar

@@deillos1lee Are you aware of 6502.org and the forum on that website? The hardware sub forum has people who are better at hardware and may be able to help you.

Thanks! It's been a while and I honestly you're well. I have been doing a lot of fun projects, but not documenting them on UA-cam. Also a lot of travel.

I have done a few projects but they aren't exciting enjoy to documents. For example, comparing the cost of the Forth Next function to a JSR/RTS for subroutines threaded code, and then to native compiled code. An idea I had for a Scamp project is having it drive solenoids to play a chime a long. I have to get working on that one.

@@mheermance This past year we moved to a new house and the bird variety and population is impressive. I see the prices of "smart" feeders and figure there must be someone who has built a Forth project to do this.

Agreed. It was a matter of building on someone else's work rather than laying a PCB out myself.

@@mheermance Hey, thanks for replying so fast. So its been a few years since the project, any headway since then? That is, any new features added? thanks again

@@gregryan8227 I added a case and sound card. I added an SD2IEC mass storage but haven't done much with it.

@@mheermance I thought a sound chip would be a nice addition...I assume its a Yamaha YM2149F or a SID 6581?

@@gregryan8227 I used the AY-3-8910. A SID chip would have been better, but they're rare and most for sale are counterfeits.

The beacons are from Pololu and use five volt logic for each of the cardinal directions. Using rotation and the wheel encoders it is possible to pin down the location of the beacon and travel to it.

Do you know how to use Python? If you encode the pig one using the notation my program accepts it should be able to generate the solution for you.

I started building a 3D printer a few years ago. It's is mostly complete but needs more work. You are correct that they have a steep learning curve.

@@mheermance I have a few "inventions" I have drawn out and I'm needing a way to make a prototype, I've made a prototype for one of them but I need a better one, that's why I was thinking a 3d printer would be best. I have quite literally thought up and drew out at least 40 inventions since middle school and never did anything with them and ended up seeing at least 2/3 of them end up being made and sold years after I had it drawn out, so I a few now that will 100% work and be very useful and I don't really know how to go about it?

@@MeMesofSavagery A 3D printer can help you and you don't need to own one. There are online services where you upload your model and pay them to print it. That way you only need to learn 3D modeling and not how to run a printer.

Thanks for watching. I would if I had that puzzle!

Thanks. I told my daughter about your compliment.

@@mheermance Thank you, I am truly humbled! 💗

Nice looking images. Yes the core of the program in Forth is tiny. But in Forth you have to do nearly everything, so graphic output would make it much bigger.

It is indeed broken, but a Google search shows this as the latest version grbl-controller.software.informer.com/3.6/

@@mheermance what about diagram of this circuit? Can you show it? I like it very much, but in my country, hitec servo is more expensive than MG996 servo, 9G servo,... So can I change MG996 instead of Hitec servo?

@@lephi1240 Use any servo that you can afford. The circuit is pretty trivial. I just run two wires from the arduino digital pins to the servo control lines, and ground and power to each servo.

@@mheermance thank you very much. I hope that you can create interesting machines like it in the future. Have a nice day!

I used half inch MDF and salvaged printer parts. Which at the time seemed like a good idea. But you're right there are much better options now.

Thanks

Thanks. I bought the screen at Radio Shack in the 1990s!

@@mheermance Ah the 80's and 90's best time to grow up. Darn I was trying to source new ones with cathode ray tubes. I got a few of those old mini TV's second hand. They have the glow but getting hard to find.

Interrupts will definitely mess up the serial communication timing. You can suspend interrupt processing during keyboard scan to prevent that, but a microcontroller is also a common approach.

I added a link to the source code in Git Hub in the description. Thanks for watching.

Thanks, yes it does. It's running at 1 MHz, so an Apple II, C64, or Atari could easily keep pace with it.

Thanks!

Thanks

You''re welcome and thanks for viewing. If you are interested in learning Forth, I have a bunch of examples in the same directory: github.com/Martin-H1/Forth-CS-101

Ben, Martin and Peter you are all invited to our Forth group. Contact me trough the link in the www.forth2020.org page, and on my Y2B channel ua-cam.com/video/jcswW5lz2mM/v-deo.html

A lot of calibration and measurement. Initially you send the centering pulse width to each motor, and then assemble the arm roughly straight. You then send the center, +90, and -90 pulse widths to see how close the arm is to the correct position. Eventually you'll find the exact values for all of these positions. At that point you can use linear interpolation to compute the pulse width for any angular position. Inverse kinematics allows you to translate a cartesian X, Y coordinate to angular positions as well. That's also a simple calibration model. I've seen more complicated models where they measure multiple angular positions to try and handle positional error due to irregularities in the feedback potentiometers. I haven't done that because the deadband error in the servos is probably higher than that other source of error. Makes sense?

@@mheermance ohh ok... But, what about torque? Is there any calculation that allows me to know the torque of the servomotor before buying it?

@@andrealugo9949 It is usually listed on the servo spec sheet in either oz inches, or kg cm. Your payload times arm length must be below it. But I never push a servo to its limits, so I don't worry about it. If it became a problem I would use springs to counteract some of the arm's weight. In large scale robots payload weight and inertia are much more of a concern.

It's emulating because most of the Apple I hardware (including the ROM) is in the software of the Propeller microcontroller. The 6502 is real hardware, as is the RAM, but everything else is emulated.

Initially the robot is using its laser sensor to locate the target, and sonar to know when it gets within grabbing distance. During this phase it ignores the IR beacon, until a successful grab, then it uses it. The IR transceiver has an emit mode, and a receive mode. The one that is the beacon is set to emit. The robot has its transceiver in receive mode, and each of its four outputs is connected to an I/O pin. These represent front, left, right, and rear, and the robot turns until the beacon is in front, and moves forward as long as their is no obstruction. If the beacon shift from front to a side, the robot spins until it is in front again, and then moves forward. In another video I demonstrate the robot moving towards the beacon, sensing and obstruction, and navigating around it.

It's a 6502 computer I built using Daryl Rictor's SBC-2 design.

@@mheermance Hi, would it be possible to share the gerber files for this board? Thanks:)

@@p8051a Hi, I got it from Rich Cini who's active on the 6502 forum. Here's a link to his website cini.classiccmp.org/6502proj.htm

@@mheermance Great! Thanks!

Thanks.

Yes, 1/4" from the hardware store, although 5/16 would be a better fit. There's a small amount of backlash, but tolerable.

@@mheermance hey thank you for your reply , quick question , for a faster motion would you recommend using a belt assembly with a stepper motor ?

@@kameelamareen Yes, belts produce faster motion. There's also something called acme threaded rod which has a lower thread density that produces faster motion. Acme threaded rod is finer machined to produce less backlash, but costs more.

@@mheermance thank you very much , means alot and have a blessed day !!

In the description is a link to the Github repo containing my Windows app. Just copy it, install Visual Studio Express from Microsoft, and open the project. You can run it either release or debug.