Building a more accurate Ormerod June 02, 2016 05:25AM |
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Re: Building a more accurate Ormerod June 02, 2016 07:00AM |
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Re: Building a more accurate Ormerod June 02, 2016 08:57AM |
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Re: Building a more accurate Ormerod June 02, 2016 10:06AM |
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Firefox3D
Thanks Dario, are those in the repository, did I just miss them?
Re: Building a more accurate Ormerod June 02, 2016 11:05AM |
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Re: Building a more accurate Ormerod June 02, 2016 11:11AM |
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Re: Building a more accurate Ormerod June 02, 2016 11:16AM |
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Re: Building a more accurate Ormerod June 02, 2016 12:51PM |
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Re: Building a more accurate Ormerod June 02, 2016 06:49PM |
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Re: Building a more accurate Ormerod June 02, 2016 07:20PM |
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Re: Building a more accurate Ormerod June 03, 2016 02:33AM |
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Mitch
Dear Firefox3d
One of the cheapest mods that should make your Ormerod more accurate, may be to replace the belts and pulleys with their GT2 equivalent. This means you won't get any rounding errors. Most objects I print and design are using the metric system, so I do find it a bit strange that the printer spends it's time microstepping to the closest imperial value. In reality, it's a small error, and the most that you'll notice is the difference in noise the printer makes.
Mitch
Re: Building a more accurate Ormerod June 03, 2016 06:18AM |
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Davek0974
The belt will not make any difference to the operation, it does not matter if its a metric or imperial pitch system as long as the belt matches the pulleys of course. The important factor is the relationship between the motor steps (usually 200) and the pitch of a lead-screw if used, if the drive is by direct belt then the only part that matters is the motor steps and pulley sizes. I have no idea what micro-step a Duet uses but on my bigger CNC stuff its 1000 so the motor has a resolution of 200*1000 steps, it's not quite that simple but in theory anyway. Lets put a pulley with a pitch diameter of 10mm on that - this will give a theoretical resolution of 0.000157mm per step - ((10 * 3.1415) / 200,000)
The thing with micro stepping is that not all of those steps are available as movement - some are used up in making the motor move to the next step, it's cumulative and the motor may not physically move if you throw say 5 steps at it, throw a couple more steps and it might move, but that's 7 steps for one movement.
Re: Building a more accurate Ormerod June 03, 2016 06:29AM |
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Re: Building a more accurate Ormerod June 03, 2016 06:53AM |
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Re: Building a more accurate Ormerod June 03, 2016 07:47AM |
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Davek0974
The belt will not make any difference to the operation, it does not matter if its a metric or imperial pitch system as long as the belt matches the pulleys of course.
Re: Building a more accurate Ormerod June 03, 2016 08:05AM |
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Re: Building a more accurate Ormerod June 03, 2016 09:17AM |
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Firefox3D
I am not mad they are not in there, certainly not as as DXF's anyway.
Re: Building a more accurate Ormerod June 05, 2016 03:05PM |
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Re: Building a more accurate Ormerod June 06, 2016 03:56AM |
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Re: Building a more accurate Ormerod June 06, 2016 11:21AM |
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Re: Building a more accurate Ormerod June 06, 2016 02:06PM |
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Re: Building a more accurate Ormerod June 06, 2016 02:37PM |
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Re: Building a more accurate Ormerod June 06, 2016 03:42PM |
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Re: Building a more accurate Ormerod June 06, 2016 03:50PM |
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Re: Building a more accurate Ormerod June 07, 2016 02:39AM |
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Re: Building a more accurate Ormerod June 07, 2016 09:25AM |
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Treito
I hope that the DuetNG will be released soon.
@dc42 If I manage to finish my own printer design (CoreXY) before the DuetNG is released is it a good idea to use a Duet 0.6 temporarily (spare for emergency cases if a Duet will fail) and waiting for the DuetNG? Or should I buy a Duet 0.85 instead?