1 Topic by Tomek (edited by Tomek 2014-03-20 03:23:09)

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Topic: Does anyone have the three hole bolt pattern for S2?

Hello!

I found some spare aluminum on my hands, and some time on a CNC machine (for precision and a bit of modding of the alu plate i got.)


I don't quite trust myself sticking the calipers into the build chamber to accurately measure the plate that is on my SD2 right now.  I mean I will do so,  but I'm hoping to get verification from someone else who has done the measurements [also my calipers are wonky.]  I'd like to machine the replacement before I take out the old one.


Does anyone know what the bolt distance measurements are on the SD2 aluminum build plate?  I don't care about the old aluminum resistor holes, since I do not use that.

I haven't found this info on the soliWiki.

Thanks and regards,
-Tomek

2 Reply by Stevos758

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Re: Does anyone have the three hole bolt pattern for S2?

Test with a piece of wood! ; )

That is a good idea! I plan to modify an aluminum plate on my SD3 to accept the QUBD pad. Patiently awaiting my CNC.

Website - http://rippsgaragetech.com/
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3 Reply by cmetzel

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Re: Does anyone have the three hole bolt pattern for S2?

I'm not going to dig through the whole thread, but it might be in here.

http://www.soliforum.com/topic/1819/hea … isonsstls/

4 Reply by ronsii

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Re: Does anyone have the three hole bolt pattern for S2?

Well.... you have a CNC machine sitting right above the heated bed wink it wouldn't take much time to eyeball the movements to within .001" then just calculate the offsets to get accurate coordinates of the holes locations smile

5 Reply by wingless

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Re: Does anyone have the three hole bolt pattern for S2?

The method I like to use when measuring a part like this is to use a surface plate, a height gauge and gauge pins. I zero off the surface, measure to the top of the gauge pin, then subrtract half the pin diameter.

This permits measurement to the "dead nuts on" standard.

6 Reply by Tomek (edited by Tomek 2014-04-03 08:06:16)

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Re: Does anyone have the three hole bolt pattern for S2?

Based on the "nominal dimensions use round numbers" logic, I got the following measurements.

Between the two front bolts ~95.7mm... = 96mm? Or 3.3750inches was close, too, if it was not in metric.


On the two isometric sides of the triangle, I am measured ~141.5mm, 141mm. ...So 141mm nominals?
This gives a triangle 132.6325mm tall. Thats 5.223". I will use the following assumptions: This was made with U.S units and has round numbers.  The u.s part I should have guessed because it was a 6"x6" square.

Triangle would be a symmetric triangle made by the perpendicular of a 3.3750" triangle 5.25" tall.

So the other suggestions were good and maybe I should have tested the distances by using my hot end. I would have to trust the SD2 calibration, but I actually thought that was spot on. Maybe someone else can verify my speculative measurements. I made them with a crappy pair of calipers and without much accuracy, but I think the reasoning is likely to be correct.

Edit: I'll upload the files tmrw in case anyone wants. Actually, I will wait until I machine the part to test it, unless requested otherwise.

7 Reply by MeshMoth

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Re: Does anyone have the three hole bolt pattern for S2?

I would do the non-technical thing and either take it off and scan it with a scanner or put masking tape on top and shade it with a pencil or crayon... we all know crayons are more precise tools than math.

8 Reply by Tomek

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Re: Does anyone have the three hole bolt pattern for S2?

MeshMoth, to be honest, yours is the best method! I played around milling it the first time, and 3.375" was NOT the right measurement. 3.75" was correct, I transcribed an error somehow.

The second time around, with the same scrap just rotated 90degrees, since I already had the plate off,  I transfered the hole pattern via a center punch and did the whole thing eyeballing (+center punch) with a drill press and a hacksaw. Was plenty nice.