The only ones I found was gear driven to give the few seconds.Dave, using micro-stepping from the controller will provide as many step pulses as needed to get a resolution of a few seconds of arc.
Do they make one that is not gear driven?
Dave
The only ones I found was gear driven to give the few seconds.Dave, using micro-stepping from the controller will provide as many step pulses as needed to get a resolution of a few seconds of arc.
Great jobYours looks like a great project. I built an indexer for my mini lathe completly (almost) with 3D printed parts. It works great and I have made three clocks with it (It is used to make the clock wheels (gears)). It is also driven with an arduino.
View attachment 122283
View attachment 122284View attachment 122285View attachment 122286View attachment 122287
Hmmmmmmmm - - - - I'd be curious as to where you found that 'table' - - - please?Well, here goes. I built a rotary table some time back, and by following all the excellent instructions here managed to get it to work quite well.
snip
Mounted the motor to the table ( 6 inch Vertex knock off, AU$215 delivered, still can't believe it!).
snip
Peter, read from here onwards:Bruce, many thanks for your offer to help, I will contact you later today. Xpylonracer, I would be grateful if you could point me in the right direction to the satisfactory solution in this post. I have read all 21 pages through at least twice and still cannot find the reason why the drivers behave differently. Thank you for your post. Cheers, Peter.
Went looking - - - - it seems that our Aussie friends have it much better than us here in the northern hemisphere.Here is the link to the table: Rotary Table (Horizontal & vertical ) 150mm/6" | eBay
The quality seems OK to me but I haven't stripped it down. I have a Vertex 4" (Taiwan) as well and this looks just as good. One day I may just get to use it if ever I sort out these other problems.
Peter.
If you do an eBay search with "rotary table HV6", I get the following link with the USA eBay site.Went looking - - - - it seems that our Aussie friends have it much better than us here in the northern hemisphere.
Looked like same product was well over $500 Canuckistani buckeroos and that was without shipping from our cousins south of us - - - - which has become incredibly pricey.
Thanks for the link - - - - - gives me a starting point for looking!
// Visual Studio C++ 2019 w/round function
#include <process.h>
#include <iostream>
#include <fstream>
#include <iomanip>
#include <string>
int main()
{
double error = 0;
double steps = 0;
double crumbs = 0;
double divisor = 0;
double degrees = 0;
double index_L = 0;
double user = 2048;
std::cin >> divisor;
index_L = (360.0 / divisor);
std::ofstream myfile;
myfile.open("Indexer.txt");
std::cout << "\n";
for (int n = 1; n <= divisor; n += 1)
{
steps = ((index_L * user) + crumbs);
crumbs = (steps - round(steps));
steps = round(steps);
degrees = (degrees + (steps / user));
error = (error + (index_L - (steps / user)));
std::cout << std::fixed;
std::cout << "Index: " << n << ": - " << "Degrees: " << degrees << char(167) << " - Accumulated Error: " << std::setprecision(8) << error << char(167) << "\n";
myfile << std::fixed;
myfile << "Index: " << n << ": - " << "Degrees: " << degrees << "º - Accumulated Error: " << std::setprecision(8) << error << "º\n";
}
myfile.close();
std::cout << "\n";
system("pause");
return 0;
}
Yours looks like a great project. I built an indexer for my mini lathe completly (almost) with 3D printed parts. It works great and I have made three clocks with it (It is used to make the clock wheels (gears)). It is also driven with an arduino.
All motors can over heat. They need cooled and not under sized.
The programming of must include a a slow down at end to prevent over run.
The encoder will hole the exactl spot it does use electrical impulses just a mirror and set of two electric eyes.
The encoders take more programming than just simple using simple pulse.
On printer if lose one or two pulses you not see the error but gear it will make a difference.
Now try calculate the the pulses out for other errors.
The encoder off shelf I can find 5,000 Resolution. The stepper motor off the shelf I found was 1.8 degrees or Resolution of 200.
If great precision use compound indexing.
Dave
Dave, I hope you are talking about a servo motor. Yes, I suppose in theory a servo motor could be built using a plain old DC motor and a rotary encoder, but there would need to be some smarts somewhere in there!
Enter your email address to join: