Just been reading a thread about clamping and a design someone is working on, in view of that thread i thought i would post this for other people who may like to "have ago" at making their own.
This design is Project 2 from Roy over at www.diycnc.co.uk
It is not always convenient to uses a vice to hold an object or piece of material when milling. It is often better to use clamps and spacers to hold down the item. These small step clamps give you 2 mm steps from 4 to 24 mm and can be used with a separate bar or on their own via the bolt slot. I have used 25mm square aluminium bar which is a common stock size. The cutter used is a 5 mm slot drill as it entails a lot of pocketing operations.
Note: The Code has only been tested on my own converted milling machine using Mach 3 software. You may need to edit the code to suit the feed speeds and parameters of your own machine. The start reference point is the top left hand corner and a tool clearance of 2.5 mm. The G-Code consists of plunge rough routing and horizontal finishing routines.
Last edited by Lee Roberts; 14-04-2012 at 05:10 PM. Reason: spelling
I have been looking at this type of clamp as well. We have a set at work for our Bridgeport. The only problem I have seen is that the steps on our set are slightly angled in towards the body of the part. I presume this is to stop it from sliding apart when used with a bar. I was thinking about having a go at milling one with a section of bar clamped to the table at a slight angle.
Is it really worth it? A set of clamps intended for the milling machine isn't too expensive and gives you all sorts of options, although sod's law does still apply.
With the clamp pictured I'd be worried that the distance between the end nearest the work and the higher surfaces will be too great and could get in the way?
at a kit for £38.95 on ebay that seems reasonable and would cover allot of jobs/use's.
I think* Roy's intention:
You may need to edit the code to suit the feed speeds and parameters of your own machine.
What clamps do you make use of the most Jonathan ?
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Yes I can buy then but wanted to have a go at making some. There is also this set http://www.arceurotrade.co.uk/Catalo.../Clamping-Sets available. Might be better for the smaller milling machines using 6mm bolts.
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