Member postings for Rockingdodge

I need to make a couple of chuck backplates but really not sure how to approach this as the leadscrew has no counter connected to it.

What the lathe does have though is a forward and reverse on the leadscrew so would this keep the thread in sinc? Otherwise how can I do this?

Thanks

Roger

//Part 2

void loop() {

pos1 = scale1.read();

pos2 = scale2.read();

delt2 = pos2 - oldpos2;

delt1 = pos1 - oldpos1;

delt = delt2 - delt1;

while (delt > 0) {

if (outA == LOW && outB == LOW) { //if 9 is low and 8 is low

PORTH = B00100000; //push 8 high & 9 low

outB = HIGH;

delt--;

}

else if (outA == LOW && outB == HIGH) { //if 9 is low and 8 is high

PORTH = B01100000; //leave 8 high, Push 9 high

outA = HIGH;

delt--;

}

else if (outA == HIGH && outB == HIGH) { //if 9 is high and 8 is high

PORTH = B01000000; //push 9 high & 8 low

outB = LOW;

delt--;

}

else if (outA == HIGH && outB == LOW) { //if 9 is HIGH and 8 is LOW;

PORTH = B00000000; //leave 8 LOW push 9 low

outA = LOW;

delt--;

}

}

while (delt < 0) {

if (outA == LOW && outB == LOW) { //if both are low,

PORTH = B01000000; //leave 8 low, Push 9 high

outA = HIGH;

delt++;

}

else if (outA == LOW && outB == HIGH) { //if 9 is low and 8 is high;

PORTH = B00000000; //push 8 low, Leave 9 LOW

outB = LOW;

delt++;

}

else if (outA == HIGH && outB == LOW) { //if 9 is high and 8 is low;

PORTH = B01100000; //push 8 high, Leave 9 HIGH

outB = HIGH;

delt++;

}

else if (outA == HIGH && outB == HIGH) { //if 9 is high and 8 is high;

PORTH = B00100000; //leave 8 high, Push 9 LOW

outA = LOW;

delt++;

}

}

oldpos1 = pos1;

oldpos2 = pos2;

}

Code as promised, had to split over 2 posts as too long!

/*

Code by Kealan O'Carroll, April 2019

Encoder.h library by PaulStoffregen

http://www.pjrc.com/teensy/td_libs_Encoder.html

Ported to Mega by Roger Clark 03/01/2022

Code intended for an arduino mega with the following wiring:

Pins 10, 11 : Scale 1 inputs

Pins 12, 13 : Scale 2 inputs

Arduino Pins 8, 9 : Outputs to DRO A and B pins. (Pins 6 and 8 on a DSUB9 type plug)

*/

#define ENCODER_OPTIMIZE_INTERRUPTS

#include "Encoder.h"

Encoder scale1(10, 11); //Wire first scale A & B quadrature lines to arduino Pins 10 and 11

Encoder scale2(12, 13); //Wire second scale A & B quadrature lines to arduino Pins 12 and 13

//If either of the scales reads in the wrong direction, reverse the pin numbers above (e.g. (4,2) changes to (2,4)

long pos2 = 0;

long pos1 = 0;

long delt = 0;

long oldpos1 = 0;

long oldpos2 = 0;

long delt1 = 0;

long delt2 = 0;

bool outA = LOW;

bool outB = LOW;

void setup() {

// MEGA PORTS

// PORTH maps to Arduino digital pins 0 to 7

DDRH = DDRH | B01100000; // Defines D8 (PH5) & 9 (PH6) as outputs for Panel

// PORTB maps to Arduino digital pins 8 to 13

DDRB = DDRB | B00000000; // Defines 10-13 as inputs

PORTH = B00000000; // sets digital pins all Low

PORTB = B00000000; // sets digital pins all Low

}

I've been trying to get my quill and head encoders to work together for a couple of months now, could not get a nano to work correctly. I purchased an M_DRO summing interface instead but that would not work either, just kept flashing between 0 and 5 microns.

So yesterday and today I ported the code over to an Arduino MEGA, wired it up, switched on and hey presto it worked so I cannot understand why the M_DRO interface doesn't! The encoder are all 5 micron Vevor encoders.

I'll put the code down below in case it's useful to anyone.

Have a great New Year

Roger

Scaling up to full size next Sean?

Roger

Umm no Duncan, if one outflow is opened for say 100 hours in a year and there are say 100 outflows then that is 10,000 hours of sewage, now the river Wye is one of the longest river in the UK so you see how the maths work and how the total can add up.

I don't know about your area but surface water, in the main, is separate to sewage here, the exception being where roof runoff at the rear of old houses do enter the sewage system.

Roger

Edited By Rockingdodge on 24/10/2021 14:47:32

The River Wye was in the news last week because the phosphate levels are waaaay over the legal limits and while land runoff from chicken farms poo being spread over fields near the river or tributaries the water company dumped raw sewage for 40,000 hours in 12 months!!!

It's a shame as we had otters coming back into the area and a couple of pairs of Kingfishers but with the minnows dying from the pollution we will lose them, also salmon caught in the river is down to low double figures this year.

Welsh Water are now saying they are 'looking into the issue' (probably because the issue has been highlighted). Before anyone says about profit, WW is a not for profit company.

It's such a shame to see the river deteriorate so much over my 70 years here.

Roger

My random 2P's worth:

They knew about gears and ratios at that time so could they have made some kind of 'rotary table' out of the parts they had already made?

Tin hat now on

The mill actually weighs in at 360kgs and the head is the heaviest part of the mill so while it's an estimate I don't think I'm that far off. If the mill had a rack for the head I would go with a counterbalance but it has a screw in the column and takes 3 1/2 turns of the handle to move 10 mm! The effort to move the head down is appreciable while not as much as going up.

A freshly charge battery in my drill will move the head up but is on the cusp of the ratchet triggering to avoid motor burnout etc.

I think I'll look for a mobility motor or similar and build on from there, meanwhile I'll use the cordless drill as I have 3 batteries so always have fresh ones available.

Cheers

Roger

There's no easy way for a counter balance and I think it would need to offset about a 100kgs to work. I don't need variable speed just need it to go up and down at a suitable rate, I have a couple of leisure batteries left over from my touring days so a buggy motor would be worth looking into.

I've recently acquired a Warco GH Universal mill and it's a great mill but the method for raising the head is rather laborious and long winded!!! I tried a 3nm stepper motor but it couldn't touch it, so I then tried my 18v drill and it did move it once fully up and down but now the ratchet in drill mode has kicked in and no longer works.

Has anyone done this 'upgrade' or got any suggestions?

Cheers

Roger

I've decided to drill out and thread for M8 rather than mess around with making some that would have an inherent weakness of a slotted head.

Thanks for all your advice chaps.

Roger

Hi,

I have a couple of holes threaded ME 1/4" x 32, I thought I had some grub screws to fit but apparently not, the ones in my tub marked as 1/4 by 32 are too small, duh!

What size grub screws do I look for, 10-32?

Cheers

Roger

Not sure how much exploring you did but if you had scrolled down to the bottom of the page you would have seen a link to the page you need - gas essentials and jets

Roger

I'm starting to set up my new to me mill, it has a table size of 800 x 240mm. I currently have a small 'toolmakers' vice with 3" x 4" jaw opening, I want to get a mill vice to fit on the table but don't really know what size to go for, 5" or 6" with the commensurate overhang or keep to a vice that stays within the boundaries of the table.

Thanks

Roger

My first Duplicate!

Edited By Rockingdodge on 29/08/2021 17:50:32

Think this is the one?

Roger

Electric cars are promoted as lower maintenance costs but where is the cost of battery replacement factored in as I can't believe they would last the vehicles life and would there be a tail-off of performance as the batteries reach end-of-life?

And would the recycling/refurbishment of batteries be completely green?

Roger

m-machine.co.uk sell it and I've always had good service from them.

Roger