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Old 11-24-2012, 01:00 AM   #171
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Pat, those changes will not be any problemm at at all

how are the resr of you doing? any progress?

Chris


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Old 11-24-2012, 01:10 AM   #172
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I just picked up some material to get started on my parts, I'll be starting with the lathe made bits first (eccentric) as I'm tweaking my mill at the moment to get a bit more accuracy and reliability out of it...these are small parts and I have too much backlash at the moment for really small cutters....

Dave,

If no one has claimed the last "B" color base I'll request it.

Hopefully some progress this weekend.

Mike


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Old 11-24-2012, 01:24 AM   #173
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There is a problem with the Color B. I was moving it to cut it and it fell and broke. I got 1 good peice form it. I got a darker color to replace it with. I have 2 of the darker color. I cut the rest from the E color. Im Sorry to the guys that picked B i was so pissed at myself.

I cant open the spreadsheet on my laptop so to who ever is cutting the side plates are you drilling the mounting holes to print so I can finish the bases.

Dave
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Old 11-24-2012, 02:17 AM   #174
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No worries Dave, I've been there myself. A dark color will contrast well with
the aluminum side plates, anything you find will be fine.
Chuck, that material sounds fine for the keeper. If it machines well, so much
the better. 304 is not noted for ease of machining. It's great you have a
source for bar ends and such, very handy.

Regards,
Maverick
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Old 11-24-2012, 03:04 AM   #175
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Quote:
Originally Posted by dreeves View Post
There is a problem with the Color B. I was moving it to cut it and it fell and broke. I got 1 good peice form it. I got a darker color to replace it with. I have 2 of the darker color. I cut the rest from the E color. Im Sorry to the guys that picked B i was so pissed at myself.

I cant open the spreadsheet on my laptop so to who ever is cutting the side plates are you drilling the mounting holes to print so I can finish the bases.

Dave
Dave,
I will be machining the side plates to the drawing.
Not a problem, the darker the better.

ninefinger,
I'm missing the width dimension for the top of Side Plate where the Beam Pivot Bearing Base (#38 page 19) is mounted. I scaled it up from the drawing then contacted don-tucker ... the width should be .890".

Thanks,

Pat H.
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Old 11-24-2012, 01:13 PM   #176
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Pat,

I drew it up in CAD and came up with .875" - I guessed it would be some fraction like 7/8" - but I can change to 0.890" - I bought 1" wide brass to work with.

Dave,

No worries, whatever you supply will be fine. Thanks,

Mike
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Old 11-24-2012, 05:26 PM   #177
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Mike,

Thanks .... that's very interesting. How did you get the .875" using CAD?

I scaled the pdf up to 170% to get the overall width (6.25") on paper then measured the top. Of course there is a of lot room for error but I came with .887". Emailed don-tucker suggesting that it might be .875". He came back with .890".

Another important measurement that is missing .. the step that has the two mounting holes (.375" above the bottom on left) for the Bottom Cylinder Head (#12). I came up with .500". What do you have for that?

All the other dimensions that are not on the drawing ... I did the same scaling up since none of them are really critical.

Pat H.
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Old 11-24-2012, 06:27 PM   #178
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Pat,

Sorry can't help with the cylinder head mounting - I only drew up the parts I'm making (so I could generate G-code for the mill). If you want I can try and have a look later.

I made an assumption to get 0.875" - which could be wrong! For example the center to hole center distance is 0.343", the edge to hole center is 0.094", so I assumed an even amount of material on the missing dimension to match the width. 2 x (0.343 + 0.094) = 0.874" and rounding for lost precision gets 0.875"

Likewise I have assumed the raised portion on the base matches the cap.

Mike
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Old 11-24-2012, 06:48 PM   #179
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Dave Any color base will be fine with me . Have all the cly ruff cut .Hope to get more work done sunday. Thanks Dale
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Old 11-24-2012, 06:51 PM   #180
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Mike,

Thanks for the info ... I thought that the CAD drawing provided measurements that drove the width to .875", but actually we both made a guess at it. I'm going to use the .890" as it will provide a little overhang and Don actually made the engine.
The step height for the cap is also okay as .500" since when I assembled the parts it came together okay.

Pat H.


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