Back to square one, so to speak [message #29237] |
Sun, 29 August 2004 14:42 |
lon
Messages: 760 Registered: May 2009
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Illuminati (2nd Degree) |
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I noticed I had this huge problem getting my rotozip tool circle cutter to make a cutout the same size... ever. The centering pin might be loosening up as I work the device.
Other problem is I am using the smallest diameter the circlemaker has, so I can't simply set it lower.
The centering pin is this big fat sloppy thing. I'd be better off to use one odf those $6 attachments for a jig saw, but again, I'm trying to use the smallest dimension for 4" drivers in an array project.
I don't know if there's any help for this or not (?) In any case, the box of 50 cent speaks I got on closeout does not suggest any new tool purchases right now... not until Sir Fitz gets his line array published. :-)
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Re: Back to square one, so to speak [message #29239 is a reply to message #29238] |
Mon, 30 August 2004 09:43 |
lon
Messages: 760 Registered: May 2009
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Illuminati (2nd Degree) |
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Hi Bill, Yes there is a lot of frustration with the variance in cutouts doing it with hand tools. I have used a 3" hole saw. Any problems handling a 4" hole saw in a standard hand drill without having forearms like Popeye the Sailor? ;-)
Are there any speed and power issues?
Anyway, right now I am still making a sample build of a line array with 50 cent speaks and scraps. Foam insulation used to gasket the mounting fills in the gaps for now.
Is chamfering the backside of the cutout part of your technique for the line array? (Maybe should take this into the line array forum.)
I am learning how to do parallel hookup with these with alligator clip leads: plus to plus and minus to minus.
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Re: Back to square one, so to speak [message #29240 is a reply to message #29239] |
Mon, 30 August 2004 10:48 |
Bill Fitzmaurice
Messages: 335 Registered: May 2009
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Grand Master |
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I use holesaws with a drill press whenever possible; they are tricky with hand held drills. With a hand held I use a heavy duty 1/2" drill at 800-1000 RPM with the workpiece clamped to the workbench. I did use a 1/2" radius quarter round router bit to chamfer the inner side of the mounting holes to allow me to get in there with a tube of silicone sealeant to seal the drivers to the baffle.
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Re: Back to square one, so to speak [message #29244 is a reply to message #29243] |
Mon, 30 August 2004 21:36 |
lon
Messages: 760 Registered: May 2009
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Illuminati (2nd Degree) |
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So he used one of those cement drills that looks like a jackhammer? All I have is a Craftmen hand drill of modest size... got it used, not sure what it's HP is or anything.
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Re: Back to square one, so to speak [message #29246 is a reply to message #29241] |
Wed, 01 September 2004 08:23 |
Jeff Robinson
Messages: 26 Registered: May 2009 Location: KC, MO
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Chancellor |
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I hope it's better than it's predecessor (model 7242). I bought one and consider it a toy grade machine. The motor burned out after cutting about 20 3.5" holes (I set the spindle speed to the correct RPM for each hole saw size I used). I now have a much better unit from Ryobi, #WDP1850. It's also rated at 1/3 Hp but the motor is about 4 times the size of the (alleged) 1/3 Hp Chinese motor on the Central Machinery (Harbor Freight) unit. good luck Jeff
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