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Recent content by yowzman
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5 Axis Centres Thermal Movement
I'm hoping they're going to retrofit cooled screws as well as scales so I can warm the machine up to a consistent temperature. Haven't got to the temperature controlled room yet because the machine still isn't signed off as 'delivered to a satisfied customer' so until it's finalised I'm not...- yowzman
- Post #62
- Forum: CNC Machining
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5 Axis Centres Thermal Movement
Hey dude, Service went over the machine with a fine tooth comb, brought down a bunch of kit, made sure all the rails were straighter than spec etc. What it has come down to is we should've been advised to have scales on the machine and possible the 18k spindle (this option is required for...- yowzman
- Post #60
- Forum: CNC Machining
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5 Axis Centres Thermal Movement
It's less 5 micron absolute position but more 5 micron repeatability with the coordinate system. It's finishing a sharp corner on an insert pocket. We know from experience if there's deviations in the edge surface it frets during lockover and damages the inserts, the pocket itself is...- yowzman
- Post #58
- Forum: CNC Machining
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5 Axis Centres Thermal Movement
It's through the whole building, and the machine is right in the middle of 2 stress relief cuts so essentially the foundation block is 6m x 6m. Thicker would have been nicer but no one from Mazak seemed concerned about the floor so neither were we. One of the techs did that test and saw 4...- yowzman
- Post #57
- Forum: CNC Machining
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5 Axis Centres Thermal Movement
Renishaw C and B probing cycle can have as many positions as I want pretty much. That's where I was yesterday when I ran a warmup. Problem is if I run a warmup, the process doesn't keep the machine warm enough and it starts cooling down again. Keeps coming back to that thermal equilibrium. Gonna...- yowzman
- Post #56
- Forum: CNC Machining
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5 Axis Centres Thermal Movement
Also two things I forgot to answer: It's bolted down to a 10 inch thick reinforced concrete floor rated for 35kN (i assume per square meter). There is a weird oscillation thing in the x axis when going from rapid to stationary that's on the engineers list, about 10 microns in the spindle head...- yowzman
- Post #51
- Forum: CNC Machining
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5 Axis Centres Thermal Movement
If thermal equilibrium is what it needs I will buy foamcore panelling to build a room and an hvac/heatpump thermal control unit. Obviously I would prefer the machine just comp the temperature if it can cos it doesn't appear to be set correctly unless I'm asking too much of it, but we will see...- yowzman
- Post #50
- Forum: CNC Machining
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5 Axis Centres Thermal Movement
They're pretty chunky, but core cooled is only on the 18k spindle, and we went 12k because we cut mostly steel. They've been stellar so far, so hopefully we reach a conclusion and resolution soon.- yowzman
- Post #49
- Forum: CNC Machining
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5 Axis Centres Thermal Movement
Been running probing cycles all afternoon. Ran it 3 times slowly and stabely maybe 1.5 micron movement at most and then run a thorough warmup for 40 minutes. Everything moved, z moved 13 microns (nearly 3 metres between z motor and base so not wild) Y moved 5 and then kept moving in the same...- yowzman
- Post #46
- Forum: CNC Machining
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5 Axis Centres Thermal Movement
Valid points, its been a lesson in expectations vs reality with a healthy slice of unknown-unkowns. It's also hard to think of a machine that costs over 150k as budget but I accept this is a different game and the tools are priced accordingly. Didn't get round to probing cycles, probably pop in...- yowzman
- Post #43
- Forum: CNC Machining
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5 Axis Centres Thermal Movement
It has not yet and probably never will run for long enough... 1-3 hours 10-15 times a week. Longer cycles are zero bother if the machine stays accurate. I just assumed that the machine builders would have a way of keeping track of the kinematic centres, the idea that this would be an issue for...- yowzman
- Post #41
- Forum: CNC Machining
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5 Axis Centres Thermal Movement
I think Mazak have got all that. They seem to have all the kit and software in the Renishaw catalogue. The challenge will be getting it out of the factory and on site by the sound of it.- yowzman
- Post #39
- Forum: CNC Machining
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Cloudy finish on 4140
4140 not common here in the UK but EN19 is similar I think (is it a bastard to break a chip roughing till you get to about 12 thou feed?) I've used similar speeds and feeds and got a good result, but the two things I find after speed feed and DOC for finish is make sure you insert tip is dead...- yowzman
- Post #25
- Forum: CNC Machining
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5 Axis Centres Thermal Movement
he did say that he'd got it better than what they work too in the factory for straightness and perpendicularity so that's in the win category.- yowzman
- Post #35
- Forum: CNC Machining