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Stepper power for autofeed on lathe

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Michael Gilligan20/10/2019 08:50:51
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14159 forum posts
618 photos

Phil

I would be interested to see the images ... but your posts are currently displaying empty frames.

Grateful if you could try again

MichaelG.

Phil Grant20/10/2019 09:21:07
58 forum posts
3 photos

Does it show now? I forgot to change the dropbox link to display the image, sorry

Michael Gilligan20/10/2019 09:48:52
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14159 forum posts
618 photos
Posted by Phil Grant on 20/10/2019 09:21:07:

Does it show now? I forgot to change the dropbox link to display the image, sorry

.

Still not showing for me, Phil [on iPad]
... perhaps someone else could check

Thanks for trying yes

MichaelG.

Phil Grant20/10/2019 09:58:34
58 forum posts
3 photos

Another go for the images.

Phil Grant20/10/2019 09:59:21
58 forum posts
3 photos

Do all the previous images show as I used the same dropbox link for them all!

Michael Gilligan20/10/2019 10:03:10
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14159 forum posts
618 photos
Posted by Phil Grant on 20/10/2019 09:59:21:

Do all the previous images show as I used the same dropbox link for them all!

.

No ... nothing except the Youtube video

Journeyman20/10/2019 10:07:50
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622 forum posts
97 photos

Must be an iPad thing all the images show for me (Linux Mint, Firefox).

John

Michael Gilligan20/10/2019 11:02:10
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14159 forum posts
618 photos
Posted by Journeyman on 20/10/2019 10:07:50:

Must be an iPad thing all the images show for me (Linux Mint, Firefox).

John

.

Thanks, John yes

sad

MichaelG.

SillyOldDuffer20/10/2019 11:29:45
4790 forum posts
1011 photos
Posted by Journeyman on 20/10/2019 10:07:50:

Must be an iPad thing all the images show for me (Linux Mint, Firefox).

John

Not working directly for me on Ubuntu/Firefox. However, I can see the pictures if I right click on the image space and select 'View Image'. (This loads an application to display the image outside the browser, ie independently of the web-site and browser combination.)

Edit: The brilliant theory that follows struck out below is WRONG!  I should have been able to display one of Phil's photos in this post, and it doesn't work...   Back to the Drawing Board in sack cloth and ashes!    

The only peculiarity I can see in Phil's Dropbox links is they all append a query string, query strings being a way of passing extra information to a server. I think it's telling Dropbox that the image is one of many, so that - if called by suitable software like an Image Viewer - Dropbox can download a series of images as from a slide-show magazine. As the forum/browser combo only expects a single image per link, my guess is the extra query parameters are illegal in that context. The Browser expects only one image, not the first of a list.

Assuming my theory is correct, it's not a forum problem. The forum just allows writers to insert links to remote images that are passed unchanged to the readers Browser. It's the writers job to get his external links right! Technically, the missing images are due the readers web Browser not coping with a query string copied innocently by Phil from Dropbox.

However, I think it's easy to fix. An example, with the unwanted query string in bold:

https://www.dropbox.com/s/i0ug22ojhy4ajt7/2019-10-19%2020.32.37.jpg?dl=1

Removing the ? and everything after seems to create a working link:

https://www.dropbox.com/s/i0ug22ojhy4ajt7/2019-10-19%2020.32.37.jpg

Once Phil's posts are locked, links can only be changed by an administrator. Phil can tweak the links when first inserted and while the timed edit window is open.

Dave

 

Edited By SillyOldDuffer on 20/10/2019 11:37:15

Michael Gilligan20/10/2019 11:46:04
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14159 forum posts
618 photos

Thanks for the extra info. Dave

As I’m sure you realise; it is difficult to ‘right click’ on an iPad .... and the ‘long press’ alternative doesn’t seem to work with Phil’s image frames.

If you could post his dropbox link as text, I can probably get there

... much appreciated

MichaelG.

Tony Pratt 120/10/2019 12:21:57
916 forum posts
3 photos

I have just completed the first stage of an electronic lead screw build based wholly on the excellent You Tube channel run by Clough42.

All works as intended, fully capable running both metric & imperial feeds/threads on my metric lathe at the touch of a button, only problem is that the Nema24 stepper rated at 4 Nm is only giving 2.3 Nm so slightly underpowered, the supplier refunded the money & let me keep the motor.

Now going to trial for a while then tidy up the mechanical bits & box up the controls.

Tony

img_6889.jpg

Frances IoM20/10/2019 12:31:33
655 forum posts
24 photos
It would be much easier both now and especially for the future to use the admittedly clunky album feature of this site - Dropbox is a tracker (hence the 'free' nature - viewers pay via privacy) + also such 'free' sites tend to drop images after a time thus often wrecking the thread (see the mess made when one such site went commercial)
Michael Gilligan20/10/2019 12:36:30
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14159 forum posts
618 photos
Posted by Tony Pratt 1 on 20/10/2019 12:21:57:

I have just completed the first stage of an electronic lead screw build based wholly on the excellent You Tube channel run by Clough42.

All works as intended […]

.

Looking good, Tony

MichaelG.

Brian Oldford20/10/2019 19:50:18
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578 forum posts
4 photos
Posted by Tony Pratt 1 on 20/10/2019 12:21:57:

. . . . . . the Nema24 stepper rated at 4 Nm is only giving 2.3 Nm so slightly underpowered, the supplier refunded the money & let me keep the motor.

.. . . . .

Tony

Could you increase the torque by gearing down the motor?

Brian Oldford20/10/2019 19:52:21
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578 forum posts
4 photos
Posted by Phil Grant on 20/10/2019 09:58:34:

Another go for the images.

All the images are good for me now. PCB looks good. What is the power rating of the resistors you have used?

Phil Grant20/10/2019 19:52:32
58 forum posts
3 photos
Posted by Frances IoM on 20/10/2019 12:31:33:
It would be much easier both now and especially for the future to use the admittedly clunky album feature of this site - Dropbox is a tracker (hence the 'free' nature - viewers pay via privacy) + also such 'free' sites tend to drop images after a time thus often wrecking the thread (see the mess made when one such site went commercial)
I will have a look at using the album feature.
Although it's the first time I've had issues with Dropbox links on forums

Phil Grant20/10/2019 19:55:46
58 forum posts
3 photos

Posted by Brian Oldford on 20/10/2019 19:52:21:Posted by Phil Grant on 20/10/2019 09:58:34:

Another go for the images.

All the images are good for me now. PCB looks good. What is the power rating of the resistors you have used?

1/8W to get them small enough.

Phil Grant21/10/2019 08:15:33
58 forum posts
3 photos

Created a new thread with pictures using the Forum Album method, hope you can now see the images.

Michael Gilligan21/10/2019 08:25:35
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14159 forum posts
618 photos

Thanks a lot for that, Phil yes

Your Album images are fine ... I am evidently unworthy to view your Dropbox

MichaelG.

Tony Pratt 121/10/2019 09:30:47
916 forum posts
3 photos
Posted by Brian Oldford on 20/10/2019 19:50:18:
Posted by Tony Pratt 1 on 20/10/2019 12:21:57:

. . . . . . the Nema24 stepper rated at 4 Nm is only giving 2.3 Nm so slightly underpowered, the supplier refunded the money & let me keep the motor.

.. . . . .

Tony

Could you increase the torque by gearing down the motor?

Certainly could, but call me old fashioned if the motor is advertised at 4 Nm I would expect to get that value, I'm now going with a Nema 23 again rated at 4 Nm from 'CNC4U', hopefully it will deliver the quoted power!

Tony

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