Stepperhead Lathe Construction – Technical Notes

[Michael GilliganParticipant @michaelgilligan61133]

Thanks to Alan and Neil :

[Michael GilliganParticipant @michaelgilligan61133]

Thanks for publishing these supporting notes … an excellent use of the website.

A quick look through suggests that there is probably a typo [or a PDF error] in the closing line of page_9. Grateful if you would check, and update if appropriate.

MichaelG.

[Alan JacksonParticipant @alanjackson47790]

Yes i think you are correct Michael. It seems to be a pdf error, the last line states "1 rev =4(square symbol)" should read "1 rev = 4 degrees" . I do not know how to input the degree symbol and neither does the pdf system. The whole data here is just a copy from the computer files and the pdf conversion has imported this error. I could correct this and resend it to Neil if it is deemed neccessary. Well spotted.

Regards

Alan

[Alan JacksonParticipant @alanjackson47790]

Hi Andrew and Neil,

I have looked at the original text and the stepper motor settings seem to have got slightly out of sync in the MEW files. Here below was what was intended. Hope this clarifies things.

Regards

Alan

 

 

Stepper Motor Settings

Here are the settings I have been using on my machine. There is much scope for changing these settings for more power and faster performance. I have selected settings that work ok and are just powerful enough so the axis can be stopped on meeting too much resistance without hopefully too much damage if things go wrong. You may want to experiment with these settings to suit your requirements so feel free.

 

These are the dip switch settings on the stepper motor drivers.

 

Z Axis (Saddle) X Axis (Cross slide) A Axis (Headstock)

SW1 OFF SW1 OFF SW1 ON

SW2 ON SW2 ON SW2 OFF

SW3 ON SW3 ON SW3 ON

SW4 ON SW4 ON SW4 ON

SW5 ON SW5 OFF SW5 OFF

SW6 OFF SW6 ON SW6 ON

SW7 ON SW7 ON SW7 ON

SW8 ON SW8 ON SW7 ON

 

1.46 A Peak 1.46A Peak 1.91A Peak

800pulses/rev 400pulses/rev 400pulses/rev

1 rev = 0.100” 1 rev = 0.005” 1 rev = 4°

 

Something seems to go wrong in sending this, because what I sent shows the thee axes Z, X & A as headers with the individual sets of information listed below each axis., not like is shown in the MEW post. I will rearrange this text to show it better in the MEW post, because otherwise this will just add confusion to something I was trying to show as a simplification.

Edited By Alan Jackson on 16/10/2014 10:07:26

[Alan JacksonParticipant @alanjackson47790]

Andrew & Niel,

I have rearranged my text to show the settings clearer and updated the settings to what I have now hope this is more clear.

Regards

Alan

 

Stepper Motor Settings

Here are the settings I have been using on my machine. There is much scope for changing these settings for more power and faster performance. I have selected settings that work ok and are just powerful enough so the axis can be stopped on meeting too much resistance without hopefully too much damage if things go wrong. You may want to experiment with these settings to suit your requirements so feel free.

 

These are the dip switch settings on the stepper motor drivers.

 

Z Axis (Saddle)

SW1 ON

SW2 OFF

SW3 ON

SW4 ON

SW5 ON

SW6 OFF

SW7 OFF

SW8 OFF

 

1.46 A Peak

800pulses/rev

1 rev = 0.100”

 

 

 

X Axis (Cross slide)

SW1 ON

SW2 OFF

SW3 ON

SW4 ON

SW5 OFF

SW6 ON

SW7 ON

SW8 ON

 

1.46A Peak

400pulses/rev

1 rev = 0.005

 

 

 

A Axis (Headstock)

SW1 ON

SW2 OFF

SW3 ON

SW4 ON

SW5 OFF

SW6 ON

SW7 ON

SW8 ON

 

1.91A Peak

400pulses/rev

1 rev = 4°

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Edited By Alan Jackson on 16/10/2014 10:38:10

[Neil WyattModerator @neilwyatt]

Thanks Alan,

You know no-one was meant to spot these files until issue 223 comes out! – and my apologies that we couldn't fit them in 222, a couple of articles ran longer than expected.

I can think of a way of fixing these tables – I'll send you an email.

Neil

[JasonBModerator @jasonb]

You just need to put the right date on them Neil then they won't show straight away

[Neil WyattModerator @neilwyatt]

To be honest, I wanted to see if it would be found. No readers seem to have found the Dremel Competition yet, although a few people from 'competition sites' have!

http://www.model-engineer.co.uk/dremelmicro

Neil

 

Edited By Neil Wyatt on 16/10/2014 16:20:10

[Michael GilliganParticipant @michaelgilligan61133]

You know no-one was meant to spot these files until issue 223 comes out! –

< shortly followed by >

Posted by Neil Wyatt on 16/10/2014 16:16:36:

To be honest, I wanted to see if it would be found.

.

There's a Politician talking !!

… So; am I in bother?, or do I get a prize?

MichaelG.

[Neil WyattModerator @neilwyatt]

Alan has kindly corrected my document, I've also made the links in the document live, and converted it to a new PDF. I've changed the link to point at the new version.

Neil

[JasonBModerator @jasonb]

I have moved the question about fitting a DRO into a topslide to this thread

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