Thread: Denford Mill Comparison
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17-10-2020 #11
OK, thanks for that. I may have to get the aluminium parts made commercially. I'll work out some typical sizes of other components and see if the Denfords would be suitable for them.
I'm very grateful for the advice from everyone, thank you.
Brian
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17-10-2020 #12
What you will find unless you have a very large budget and equally large workshop space is that there is always a need for a larger machine because of a certain job
I had this issue for some years and as such never bought a machine
What I realised was that there was loads of jobs that it would have done and the odd one that would not fit on the machine
I ended up with a need ti mill a 19mm hex on some parts that I was making from aluminium billet. I looked to get them milled locally and realised that whilst I could get it done readable cheaply I was always at the back of the queue
So I put my hand in my wallet and bought the Starmill
It’s served me well but I was offered a boxford vmc190 and bought it
Paul
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17-10-2020 #13
9" Y travel is quite a lot.
Short of an industrial size machine, you're probably looking at some of the Chinese machines, and converting one yourself.
ArcEuroTrade sell the Sieg SX3.5, which has 200mm Y travel.
Emvio sell their EMV-25VBB which has 185mm of Y travel.
There will also be other machines as well, if you search around the many other machine tool sellers.
Downside of those machines for me, is they are both R8 tapers, so the only quick toolchange option is the Tormach style system.
I personally prefer BT tapers.Avoiding the rubbish customer service from AluminiumWarehouse since July '13.
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17-10-2020 #14
Depending what you want to cut you may get away with a Denford Router, though it isn't the recommended route it would give you well over 9" x 9" you are looking for. Most of my work is engraving or fine detail aluminium where the biggest cut I need is a 0.2mm deep facing cut with an 8mm tool and the majority is roughing and finishing with 1, 2 and 4mm tools so I bought a Denford (it may be a Pro 2600 but I am not sure) and fitted a chinese 2.2kw water cooled spindle.
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12-12-2020 #15
hi Just a quick question I am getting a starmill that has mach 3 on it , could you advise what tool probe do you use and how did you set this up with the machince. Mine has the original controller board and can see a spare connection for the tool probe, next to the xyz datums ?
Thanks
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13-12-2020 #16
I made my own
Basically a 6mm ball bearing silver soldered on to a piece of silver steel about 2” long
The other end is threaded m4
It screws into a piece of brass bar and the brass bar is bonded into a Tufnell sleeve (to electrically insulate it from the machine)
I then machined up a ‘tool holder’ with a slightly tapered bore and three adjusting screws at 120deg spacing
The Tufnell sleeve is a tight fit in the top end (small end) of the tapered bore the opposite end of the tapper is a piss fit in the Tufnell sleeve thus allowing the three adjustment screws to be used to centre up the ball of the probe
On first use a dti is used to clock up the ball using the three screws similar to clocking up a part in a 4 jaw Chuck
Thereafter unless the probe is knocked it runs true after repeated tool changes
In use a crock clip is used to add power to the probe and when it touches the work it completes the circuit and trigger the controller
Obviously only works on metal work
On none conductive work then sticky aluminium tape is used connected to the machine with a crock clip
The accuracy as proven very good I clamped a 30mm bore bearing on the bed and probed the bore adjusting the ball dia in the probe settings until the bore was measured as 30mm dia
The ball is physically 6mm dia, in the software it is recorded as 0.05 different to 6mm
It will repeat the 30mm bore measurement within +/- 0.01 over 20 tries which more than good enough for my use
It will also probe in Z
I have a tool height probe which is insulated from the machine so I need a opposite polarity crock clip for probe to tool height setting block
I use the probe as my reference tool
Then set up all other tools height as a delta to the probe and load these into the tool table using g43 on tool change to load the tool heigh delta
This has proven very effective so far and saves having to touch off the tool every tool change but does need a number of R8 tool holders with the commonly used cutters pre loaded
I must admit the boxford vmc190 that I now have is much easier on Tool changes as it as a manual drawbar and tool holders with pull studs - nice
Cheers. Paul
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13-12-2020 #17
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13-12-2020 #18
My star mill is converted to mach3 so I connected to the BOB
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13-12-2020 #19
:) which BOB did you use :)
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13-12-2020 #20
One of the eBay specials from China. The one with the 3 relays on it
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