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Search: Posts Made By: Allegheny
Forum: Motors & their mountings Thu 12 July 2018, 17:20
Replies: 12
Views: 5,392
Posted By Allegheny
Hi BillT, What motors did you use for the...

Hi BillT,

What motors did you use for the Bridgeport? I'm planning to convert an Induma 1s this fall/winter (an Italian vertical turret mill like a BP on steroids - weighs 3,300#) and have been...
Forum: MechMates already cutting Wed 17 January 2018, 11:02
Replies: 95
Views: 25,767
Posted By Allegheny
Hmmm, one of the main reasons to go with servos...

Hmmm, one of the main reasons to go with servos is the ability to use the encoders for feedback positioning. According to Centroid's specs, the Acorn does NOT allow for true closed loop operation:
...
Forum: Introduce yourself and start planning Mon 28 April 2014, 04:34
Replies: 17
Views: 3,352
Posted By Allegheny
Bolt together MM's will work just fine. If you...

Bolt together MM's will work just fine. If you ever actually do take it apart to relocate it, however, make certain to through drill each bolted connection with at least a pair of holes for hardened...
Forum: Motors & their mountings Tue 26 February 2013, 05:22
Replies: 278
Views: 84,277
Posted By Allegheny
Here's a short paper that does a reasonably good...

Here's a short paper that does a reasonably good job of describing the interactions of voltage, amperage, inductance and speed on stepper performance:

Brian
Taxachusetts
Forum: 10. Base Table Fri 02 November 2012, 08:25
Replies: 10
Views: 3,964
Posted By Allegheny
Hi Hardouin, Trust me, as long as you drill...

Hi Hardouin,

Trust me, as long as you drill the holes for the dowel pins completely through both parts to be joined, inserting and removing dowel pins is very easy and takes little time. I bet...
Forum: 10. Base Table Tue 30 October 2012, 10:07
Replies: 10
Views: 3,964
Posted By Allegheny
Hi Hardouin, Welcome to the forum. I'm...

Hi Hardouin,

Welcome to the forum.

I'm no structural engineer - but there are several on here including Gerald that I'm sure will chime in soon enough - but it looks good to me.

One of the...
Forum: Cutting various materials - bit selection, feeds, speeds Mon 01 October 2012, 16:13
Replies: 8
Views: 2,731
Posted By Allegheny
I could be wrong and you might be able to do...

I could be wrong and you might be able to do this, but I wouldn't even think about trying it.

The surface cutting speed and chip load for steel is one, if not two orders of magnitude below what a...
Forum: Miscellaneous / General / Whatever / Catchall Mon 18 June 2012, 11:04
Replies: 308
Views: 64,358
Posted By Allegheny
If I understand what Mike is saying - chatter...

If I understand what Mike is saying - chatter occurs at the resonate frequency/rpm of a given motor. Any attempts at minimizing chatter, therefore, should revolve around keeping that stepper from...
Forum: The Market Place Wed 28 September 2011, 07:45
Replies: 7
Views: 1,994
Posted By Allegheny
I was actually going to buy a ShumaTech DRO for...

I was actually going to buy a ShumaTech DRO for one of my milling machines, only to find that Scott (the guy who runs the show) stopped producing new kits nearly a year ago. If you are determined to...
Forum: Miscellaneous / General / Whatever / Catchall Sat 17 September 2011, 11:36
Replies: 308
Views: 64,358
Posted By Allegheny
How about some tightly fitting rigid felt wipers...

How about some tightly fitting rigid felt wipers on both faces of the bearing blocks?

I don't know exactly how you would do this for a CNC router, but in the machine tool world, the felt is cut to...
Forum: Miscellaneous / General / Whatever / Catchall Fri 16 September 2011, 05:21
Replies: 308
Views: 64,358
Posted By Allegheny
That was very interesting. The main take away...

That was very interesting. The main take away message for me was the ability of the round rails to self-align. Given that our machines may not be perfectly flat straight and/or square (especially...
Forum: Miscellaneous / General / Whatever / Catchall Fri 16 September 2011, 05:04
Replies: 308
Views: 64,358
Posted By Allegheny
Hi Kim, I am slowly getting closer to...

Hi Kim,

I am slowly getting closer to starting a build and the more I look at this thread, the more convinced I become that linear bearing slides are the way to go.

I was wondering if you could...
Forum: The Market Place Wed 30 March 2011, 06:20
Replies: 5
Views: 1,263
Posted By Allegheny
Not to hijack the thread, but does anyone have an...

Not to hijack the thread, but does anyone have an idea of how this controller stacks up to those put out by Hypertherm?

I appreciate that those by Hypertherm are the best you can buy, but they...
Forum: Miscellaneous / General / Whatever / Catchall Mon 28 March 2011, 05:51
Replies: 308
Views: 64,358
Posted By Allegheny
I like the built-in bottle/cup holder :D ! ...

I like the built-in bottle/cup holder :D !

Brian
Taxachusetts
Forum: General - MM Build Wed 23 March 2011, 05:18
Replies: 24
Views: 6,120
Posted By Allegheny
How about using a cell phone camera? Even easier!

http://www.technologyreview.com/computing/37021/?nlid=4264&a=f

Sounds early in the process/development, but looks to have promise.

Brian
Taxachusetts
Forum: Miscellaneous / General / Whatever / Catchall Mon 21 March 2011, 07:00
Replies: 308
Views: 64,358
Posted By Allegheny
Ouch - that is a huge tube! The only bending I'd...

Ouch - that is a huge tube! The only bending I'd be worried about would be the support table! Would sure make for good dampening though. With such a heavy tube, I would think you'd need some...
Forum: Miscellaneous / General / Whatever / Catchall Thu 10 March 2011, 15:07
Replies: 308
Views: 64,358
Posted By Allegheny
Hi myousry, While I wouldn't consider myself...

Hi myousry,

While I wouldn't consider myself "metrically" challenged, I'm not all that familiar with common metric stock sizes. Looking at the gantry in post #197, I'd estimate it at 4x8" tubing,...
Forum: Miscellaneous / General / Whatever / Catchall Thu 10 March 2011, 13:03
Replies: 308
Views: 64,358
Posted By Allegheny
Hi myousry, I see what you need to do. But...

Hi myousry,

I see what you need to do. But there's more then one way to "skin a cat" as we say in the states.

How about spacing the ball screw mounts further from the gantry by putting some...
Forum: Miscellaneous / General / Whatever / Catchall Thu 10 March 2011, 09:16
Replies: 308
Views: 64,358
Posted By Allegheny
The other concern I would have with a multi-part...

The other concern I would have with a multi-part gantry - as opposed to a single large tube on which to mount the z-axis - is the difficulty in keeping everything in alignment. As configured, there...
Forum: 10. Base Table Mon 22 November 2010, 09:13
Replies: 30
Views: 12,053
Posted By Allegheny
As a suggestion - once you have a breakdownable...

As a suggestion - once you have a breakdownable (is that even a word?) table set up and leveled/squared/etc., and before you attache the MDF bed, drill two holes though every bolted joint and drive...
Forum: The Market Place Mon 11 October 2010, 04:37
Replies: 6
Views: 2,685
Posted By Allegheny
David, If you are no longer going to be...

David,

If you are no longer going to be making these available, would you be willing to post, or email to interested parties, the drawings of the three pieces so they could be fabbed locally?
...
Forum: The Market Place Mon 19 April 2010, 09:06
Replies: 93
Views: 29,963
Posted By Allegheny
There was someone that had tried this system out...

There was someone that had tried this system out - maybe on the ShopBot forum or CNC-Zone? Don't remember.

Anyway, if you're going to spend $3k, why not just get a spindle and be done with it? ...
Forum: General - MM Build Sun 18 April 2010, 07:30
Replies: 54
Views: 15,106
Posted By Allegheny
Upgrading the house to 400Amps would be...

Upgrading the house to 400Amps would be INCREDIBLY expensive. I looked into this ten years ago - just the breaker box and the 400A main breaker were $2k! You don't want to even think about the...
Forum: Rails & Rollers Tue 13 October 2009, 15:12
Replies: 12
Views: 5,050
Posted By Allegheny
For those that want to take the use of stretched...

For those that want to take the use of stretched wires to a high level of precision, consider that old-time millwrights set up massive machines using piano wire and a few precision tools (like...
Forum: General - MM Build Sun 06 September 2009, 15:39
Replies: 49
Views: 14,277
Posted By Allegheny
Brian, Bolting the table directly to the...

Brian,

Bolting the table directly to the floor would theoretically work. I suggest that you'll need to budget for chiropractic treatments, however.

Brian
Showing results 1 to 25 of 48

 
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