Thread: Ready Steady Eddy
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31-01-2014 #131
Reactive Resins Syntac EPAFD epoxy with Synamin 201-c slow hardener.
This was the starting point using shims to level up the linear rail support beams.
A test piece was made using a 50x50 offcut, epoxy resin, draught excluder moat, http://www.toolstation.com/shop/Iron.../sd2802/p70101
Temperature 17 deg C
Used kitchen digital scales to measure out by weight.
Mixed in a plastic cup, no melting of cup, no heat felt but it was only a very small amount.
Just after pouring, the viscosity was very good for pouring, it seemed to be runnier once the hardener had been added and mixed.
You can see surface bubbles, I dragged a tooth pick/cocktail stick through the epoxy a few times and bubbles dispersed.
Next time I will mix the two parts more slowly so as not to introduce so much air.
The viscosity was such that 2 hours later the remains in the plastic cup could still move like a thick fluid.
Slight leakage occurred at draught excluder butt joints e.g. corners, so I will be using a dab of glue at these points.
Following day about 20 hours after pouring.
Depth of epoxy = 5mm
Draught excluder removed with a chisel no problem but it left a slight sticky residue that cleaned up okay with spirits and the epoxy captured a very small amount of foam in it's outer skin.
A slight meniscus can be seen but this was expected, 'Clive S' describes how best to remove this.
The epoxy is fairly hard but you can tell it has a day or two to go until it's cured.
I would say this test was a success and I have no problem with using this on the machine.Last edited by EddyCurrent; 31-01-2014 at 03:02 PM.
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The Following 5 Users Say Thank You to EddyCurrent For This Useful Post:
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31-01-2014 #132
Where's the pics Eddy???!! Need pics
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31-01-2014 #133
Can you see them now ? I was doing a long edit, I can see them here okay.
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31-01-2014 #134
Earlier I was having problems getting my spindle running in vector speed mode, this is now sorted thanks to ABB
Spindle ELTE, V=220, A=9.5, Speed=24000 rpm, Kw=2.2
Drive - ABB ACS355 2.2kw 01x-09A8-2
The problem was it would work great in v/f mode but not in vector mode.
Following many emails and parameter changes without success an AB engineer paid me a visit and it was sorted out in a morning. (I don't think you would get this support with a Chinese VFD)
This was the solution;
1) Drive firmware changed from 5060 to latest 5090. Version 5090 is known to contain improvements for ‘special motors’
2) Switching frequency par. 26.06 set from ‘4kHz’ to ‘16kHz’. Par. 26.07 = ON(LOAD).
3) Rescaled group 99 motor data to 200Hz equivalent, (i.e. 200Hz, 11500rpm, 9.5A, 110V,1.1kW)…changing this allowed the motor to achieve 24000rpm for the first time during testing
4) Adjusted ramp rates (par. 22.02 = 5s and in particular 22.03 = 10s), also introduced S-shape (par. 22.04 = 1s)
5) Adjusted non-user parameter 112.08 from ‘40’ to ‘10’ (made motor sound quieter, particularly at low speeds)
6) Speed controller ‘Autotune’ performed (using par. 23.05), resulted in par. 23.01, Gain = 3, par.23.02 Integral = 2s and par. 23.04 Accel Comp = 1.45sLast edited by EddyCurrent; 02-02-2014 at 12:03 PM.
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31-01-2014 #135
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31-01-2014 #136
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31-01-2014 #137
You could also try Easy Composites - they do low viscosity infusion resins with a variety of timed hardeners, which I've used for vacuum infusion projects - the resin needs to be thin for that as you are essentially sucking it through your carbon/kevlar/glass fibres. The West System is probably similar, but if you need another price point......
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The Following User Says Thank You to Washout For This Useful Post:
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31-01-2014 #138
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31-01-2014 #139
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You can see surface bubbles, I dragged a tooth pick/cocktail stick through the epoxy a few times and bubbles dispersed.
Next time I will mix the two parts more slowly so as not to introduce so much air.
Ready Steady Eddy-epoxy2.jpg
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