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Search: Posts Made By: jwt
Forum: Construction started, but not cutting yet Thu 18 November 2010, 03:13
Replies: 35
Views: 7,905
Posted By jwt
Its high pitched, I'll record it if I can No...

Its high pitched, I'll record it if I can

No resistor yet, g540 limits to 3.5 A, motors are 4.5A. Just means I'm not availing of the idle current limiting feature, which given that I'm only...
Forum: Troubleshooting Wed 17 November 2010, 16:57
Replies: 41
Views: 8,137
Posted By jwt
You might want to wait until I try it out in...

You might want to wait until I try it out in anger :) so far it's all theoretical until the pinions get a hard workout
Forum: Construction started, but not cutting yet Wed 17 November 2010, 15:20
Replies: 35
Views: 7,905
Posted By jwt
Yep, stuck an order in, its already with Fedex. ...

Yep, stuck an order in, its already with Fedex.

Should have ordered 2, shipping would be the same but didn't think of it until now :o

Rummaging around trying to find a male/male db25 printer...
Forum: Troubleshooting Wed 17 November 2010, 12:47
Replies: 41
Views: 8,137
Posted By jwt
Aha! This is where my cunning stunt of...

Aha!

This is where my cunning stunt of cutting the grub screws down and having a flat surface pressing against the flat on the shaft comes into play.
*cough*
Forum: Troubleshooting Wed 17 November 2010, 10:42
Replies: 41
Views: 8,137
Posted By jwt
If it shifts after using high strength loctite,...

If it shifts after using high strength loctite, either you don't have enough area on the threads (too small a diameter or too thin a wall) or you haven't cleaned the threads on the pinion and screws...
Forum: Construction started, but not cutting yet Wed 17 November 2010, 03:49
Replies: 35
Views: 7,905
Posted By jwt
Looks like my g540 has a problem :mad: One...

Looks like my g540 has a problem :mad:

One of the G250x modules is faulty, g540 is showing boith red and green led lit.

If i remove the module all is well.


Its the same module I wired the...
Forum: Construction started, but not cutting yet Tue 16 November 2010, 17:37
Replies: 35
Views: 7,905
Posted By jwt
Thanks Gerald, I thought that might be the case...

Thanks Gerald, I thought that might be the case but was having a bit of wishful thinking. :)

After a nights sleep and re-looking at it, I cut the rub screws down by cutting the other end off by...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Tue 16 November 2010, 07:38
Replies: 8
Views: 3,112
Posted By jwt
Good point Red. Me too Sean. :)

Good point Red. Me too Sean. :)
Forum: Construction started, but not cutting yet Mon 15 November 2010, 14:39
Replies: 35
Views: 7,905
Posted By jwt
Lots done so far Everything painted ...

Lots done so far

Everything painted

Linear rails mounted and trued up

I had to make 4 small steel boxes to sit between the gantry and the linear rail blocks, approximately 40mm wide 50mm...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Mon 15 November 2010, 14:03
Replies: 8
Views: 3,112
Posted By jwt
Supplier wants 62 pounds sterling, roughly 75...

Supplier wants 62 pounds sterling, roughly 75 euro extra to bore 5 pinions to 14mm.

Bit saucy I think.

I'll ring around and see if I can find a local engineering shop that could do it for me
...
Forum: MechMates already cutting Mon 15 November 2010, 13:54
Replies: 268
Views: 42,193
Posted By jwt
I had trouble boring concentric holes so I asked...

I had trouble boring concentric holes so I asked my supplier to supply the pinions pre bored to 14mm.

the pinions were 5 pounds sterling each, same bored to 14mm are 17.50 pounds sterling.

so...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Fri 12 November 2010, 14:19
Replies: 8
Views: 3,112
Posted By jwt
let me see if I've got this right.... You...

let me see if I've got this right....

You are rotating the pinion in the drill press chuck.

The HSS drill bit is held stationary in the jacob chuck which is bolted to the drill press table
...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Fri 12 November 2010, 13:52
Replies: 8
Views: 3,112
Posted By jwt
Problem drilling the pinion concentric

I've just trashed 5 pinions trying to drill them concentric using a good drill press a vice, a vice and clamps, a vice clamps and accurately centered pinion.

the existing pinion hole is 10mm, the...
Forum: MechMates already cutting Fri 12 November 2010, 13:39
Replies: 549
Views: 103,012
Posted By jwt
No problem...

No problem http://www.freesmileys.org/smileys/smiley-fc/surrender.gif
Forum: Rails & Rollers Fri 12 November 2010, 03:16
Replies: 13
Views: 3,372
Posted By jwt
If grinding the rails is an issue maybe look at...

If grinding the rails is an issue maybe look at linear rails.

www.automation-overstock.com did me a good deal.

But there are unforeseen issues like you have no easy way to mount the rack for...
Forum: MechMates already cutting Fri 12 November 2010, 03:08
Replies: 549
Views: 103,012
Posted By jwt
I'd second Russell's comment. Even if you...

I'd second Russell's comment.

Even if you aren't paying for the material you still have to handle it, get it delivered, stack it, put it on the table, remove it, dump it.

looking at the photos...
Forum: MechMates already cutting Fri 12 November 2010, 02:57
Replies: 550
Views: 110,478
Posted By jwt
That looks fantastic. My biggest problem...

That looks fantastic.

My biggest problem with the MechMate is that I have a multitude of jobs ready for it but none of them are paying jobs.

Computer control box, remote control boat hull for...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Thu 11 November 2010, 12:23
Replies: 3
Views: 2,270
Posted By jwt
I've just welded up my racks today, joining a 2m...

I've just welded up my racks today, joining a 2m to a 1m length.

Straight forward, just chamfer the ends so you get a good root weld.

I'm using linear rails so I had to drill mine every 300mm...
Forum: Troubleshooting Thu 11 November 2010, 12:19
Replies: 41
Views: 8,137
Posted By jwt
To my eye the Y-axis is wonky. Look at the...

To my eye the Y-axis is wonky.

Look at the vertical line, its as though the piece moved to the right causing the cut to be deeper.
Forum: Construction started, but not cutting yet Sun 07 November 2010, 05:56
Replies: 35
Views: 7,905
Posted By jwt
:o Mental note to self, bring camera with me

:o

Mental note to self, bring camera with me
Forum: Miscellaneous / General / Whatever / Catchall Sun 07 November 2010, 05:48
Replies: 16
Views: 3,762
Posted By jwt
What Constitutes a MechMate

I'd like to, very timidly, ask a question.

What constitutes a MechMate?

Is it the overall base table design?

twin horizontal co planar gantry rails?

The y-Car design?
Forum: Construction started, but not cutting yet Sat 06 November 2010, 09:51
Replies: 35
Views: 7,905
Posted By jwt
Gantry welded and square. Steel degreased...

Gantry welded and square.

Steel degreased ready for painting

Next up epoxy and drilling linear rail mounting holes, all 170 of them.
Forum: Construction started, but not cutting yet Thu 04 November 2010, 14:00
Replies: 35
Views: 7,905
Posted By jwt
hmmm

hmmm
Forum: Construction started, but not cutting yet Wed 03 November 2010, 11:22
Replies: 35
Views: 7,905
Posted By jwt
Short day today. Got the Y Car welded up,...

Short day today.

Got the Y Car welded up, the Spider drilled and welded, the z plate and tubes drilled.

John
Forum: Construction started, but not cutting yet Tue 02 November 2010, 15:25
Replies: 35
Views: 7,905
Posted By jwt
Table Welded and Flipped

Apologies for the quality of the pics.
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