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Search: Posts Made By: rayditutto
Forum: General - MM Build Fri 22 August 2014, 11:49
Replies: 7
Views: 6,493
Posted By rayditutto
I suppose I should be more careful with my words....

I suppose I should be more careful with my words. What I am measuring is the wander in the the rails rather than the table itself. The same applies for the vertical measurement. Once you know the...
Forum: General - MM Build Thu 21 August 2014, 19:54
Replies: 7
Views: 6,493
Posted By rayditutto
I should clarify, the camera was viewing downward...

I should clarify, the camera was viewing downward so the bow is side to side not vertical.
To measure the vertical variance I would have to take into account the line sag...
Forum: General - MM Build Thu 21 August 2014, 15:01
Replies: 7
Views: 6,493
Posted By rayditutto
I've just finished building an extended table...

I've just finished building an extended table (11' 6"). A while back i acquired an inexpensive USB microscope...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Wed 16 July 2014, 14:55
Replies: 449
Views: 224,048
Posted By rayditutto
if i may ask, what were your rpm, feed rate and...

if i may ask, what were your rpm, feed rate and bit for cutting the steel?
Forum: 55. Dust Management Wed 29 February 2012, 21:36
Replies: 18
Views: 11,306
Posted By rayditutto
check out...

check out http://www.floweringelbow.co.uk/2011/dust-extraction/dust-sniper-vid/ which includes a pair of Bill Pentz mini cyclones powered by a double boxed & bafffled shop vac style vacuum all on...
Forum: Miscellaneous / General / Whatever / Catchall Fri 05 August 2011, 12:22
Replies: 8
Views: 3,987
Posted By rayditutto
perhaps http://www.cncmotion.com/titangallery.htm...

perhaps http://www.cncmotion.com/titangallery.htm :D
Forum: MechMates already cutting Sun 12 June 2011, 01:31
Replies: 1,586
Views: 438,790
Posted By rayditutto
if i may ask, what wire did you use for your VFD...

if i may ask, what wire did you use for your VFD to spindle?

i guess while i'm asking - would you describe how your quick mount plate works

cheers,
robin
Forum: MechMates already cutting Sat 28 May 2011, 23:04
Replies: 66
Views: 16,034
Posted By rayditutto
Gerald, you must be a teacher :) i only had...

Gerald, you must be a teacher :)

i only had to tilt my head 45 deg's to see that in all these years i have not lost my knack for figuring things out the hard way :D
Forum: MechMates already cutting Sat 28 May 2011, 15:30
Replies: 66
Views: 16,034
Posted By rayditutto
to put a number to Geralds' succinct and...

to put a number to Geralds' succinct and intuitive drawing . . .

using http://en.wikipedia.org/wiki/Circular_segment as the basis of the math . . .

r = cutter radius

inset = d =...
Forum: Miscellaneous / General / Whatever / Catchall Fri 29 April 2011, 10:51
Replies: 31
Views: 9,713
Posted By rayditutto
there are archeological tools that are useful...

there are archeological tools that are useful when sites do disappear

eg. the "wayback machine" (http://replay.web.archive.org/20100516124834/http://mechmate.com/)

it won't get everything but...
Forum: Miscellaneous / General / Whatever / Catchall Fri 22 April 2011, 12:11
Replies: 31
Views: 9,713
Posted By rayditutto
to add to Brad's "axis of information density",...

to add to Brad's "axis of information density", as you move to the right the information is more "curated"
I suspect that one reason a Mechmate wiki has not appeared is that Gerald (now Mike) has...
Forum: MechMates already cutting Tue 19 April 2011, 16:14
Replies: 174
Views: 72,082
Posted By rayditutto
is this the course:...

is this the course: http://ocw.mit.edu/courses/architecture/4-510-digital-design-fabrication-fall-2008/ ?
Forum: Profiled (laser cut) & bent steel plate Tue 30 November 2010, 18:52
Replies: 4
Views: 5,488
Posted By rayditutto
according to the video comment, "3mm old steel...

according to the video comment, "3mm old steel with 4mm carbide bit"

seems to produce a slurry (for lack of a better word) rather than chips

i'm curious also about the feed rate and type of bit...
Forum: Construction started, but not cutting yet Fri 22 October 2010, 14:14
Replies: 35
Views: 16,954
Posted By rayditutto
do you have a specific epoxy in mind?

do you have a specific epoxy in mind?
Forum: MechMates already cutting Mon 18 October 2010, 15:21
Replies: 137
Views: 47,847
Posted By rayditutto
try 2" copper wire 10 or 12 gauge clipped to the...

try 2" copper wire 10 or 12 gauge clipped to the bit - it will bend much better than your bit

cheers
Forum: Miscellaneous / General / Whatever / Catchall Wed 01 September 2010, 01:41
Replies: 22
Views: 7,775
Posted By rayditutto
On the surface while it might seem like the kid...

On the surface while it might seem like the kid is a candidate for a Darwin award the facts reported are slim and there are some issues to consider.

the reported claims in the lawsuit seem to...
Forum: Archives Fri 30 April 2010, 07:52
Replies: 14
Views: 8,134
Posted By rayditutto
with respect to cost, where on the spectrum...

with respect to cost, where on the spectrum between v-roller with angle iron and linear guides does this product fall?
Forum: MechMates already cutting Mon 26 April 2010, 19:16
Replies: 1,586
Views: 438,790
Posted By rayditutto
it looks like it may breathe through the top also

it looks like it may breathe through the top also
Forum: Cutting various materials - bit selection, feeds, speeds Sun 21 March 2010, 23:48
Replies: 8
Views: 5,848
Posted By rayditutto
I'm perplexed and concerned - perplexed because i...

I'm perplexed and concerned - perplexed because i don't see a clear answer and concerned because, well, it's fire

this is pure speculation but, here goes . . .
on straight flute cutters as you've...
Forum: Cutting various materials - bit selection, feeds, speeds Sun 21 March 2010, 14:51
Replies: 8
Views: 5,848
Posted By rayditutto
.25" or .5"? 1 or 2 flutes? do you have a pic...

.25" or .5"?
1 or 2 flutes?
do you have a pic of the bit?

cheers,
robin
Forum: Cutting various materials - bit selection, feeds, speeds Sun 21 March 2010, 14:21
Replies: 24
Views: 11,838
Posted By rayditutto
Normand, you are quite right :) sometimes i...

Normand,
you are quite right :)
sometimes i forget there is a bigger picture to look at :o
(and always trade offs)

i've learned to keep my depth of cut <= to the bit diameter which seems to...
Forum: Cutting various materials - bit selection, feeds, speeds Sat 20 March 2010, 01:05
Replies: 24
Views: 11,838
Posted By rayditutto
Yes, a straight bit should have less (but...

Yes, a straight bit should have less (but possibly some) tear out

The cutting force is in the direction that the cutting edge is moving

Imagine cutting a slice of bread from the bottom up :eek:...
Forum: Cutting various materials - bit selection, feeds, speeds Fri 19 March 2010, 15:06
Replies: 24
Views: 11,838
Posted By rayditutto
That looks like tear out . . . which would be...

That looks like tear out . . . which would be explained by the spiral upcut bit pictured . . . as the cutting edge is leaving the wood it will tend to tear

a spiral downcut will cut in to the...
Forum: 701. Motor Drives Wed 10 March 2010, 09:04
Replies: 15
Views: 8,888
Posted By rayditutto
Just last evening i was comparing (but no...

Just last evening i was comparing (but no conclusions yet) the 34HS8801 (425 oz-in) and the 34HS6801 (at approx 300 oz-in) in the context of a 4:1 belt reduction using a G540

cheers,
robin
Forum: 701. Motor Drives Wed 10 March 2010, 08:22
Replies: 15
Views: 8,888
Posted By rayditutto
there's a rather short but rich thread . . . Why...

there's a rather short but rich thread . . . Why a stepper motor should not be too big (http://www.mechmate.com/forums/showthread.php?t=255) that i keep coming back to (it may be short but the...
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