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Recent content by Finngineering
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Resurrection of a lobotomised Maho 600T
Yes, for the vertical axis the box ways are bolted on. In the photo linked by DeadMahoDude, the bolts are the ones where the heads are painted green.- Finngineering
- Post #51
- Forum: Deckel, Maho, Aciera, Abene Mills
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Resurrection of a lobotomised Maho 600T
After a long time (mainly due to a lot of travelling), here is the next progress report. I pulled the ram off the machine for inspection and cleaning. This is the most wear I have found so far. It's not great. Towards the front of the machine, the flaking marks are all gone and the surface is...- Finngineering
- Post #48
- Forum: Deckel, Maho, Aciera, Abene Mills
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Resurrection of a lobotomised Maho 600T
That is some interesting information, thank you. But not something I will use. There are software limits in LinuxCNC (and all other CNC controllers I would presume), which will be the first layer of protection against overtravel. Potentially, it takes the acceleration (deceleration) into account...- Finngineering
- Post #47
- Forum: Deckel, Maho, Aciera, Abene Mills
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Resurrection of a lobotomised Maho 600T
I cleaned up the x-axis ballscrew and end cover and installed them on the machine. Just for my own interest, I measured the vertical play in the x-axis slide by in turn lifting each end of the slide by a car jack. This is corresponding to the jib I measured a bit on a few posts back. I pumped...- Finngineering
- Post #45
- Forum: Deckel, Maho, Aciera, Abene Mills
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Resurrection of a lobotomised Maho 600T
A bit more progress. I started with the wiring of the cabinet. The DC power supplies and the emergency stop / reset circuit are wired up, but not much else. Today I also put the cross slide back on the saddle(?). I replaced all the copper washers for the lubrication lines. While doing that...- Finngineering
- Post #43
- Forum: Deckel, Maho, Aciera, Abene Mills
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Resurrection of a lobotomised Maho 600T
Yes, it would make sense to straighten it before evaluation or starting reconditioning. I was just having some thoughts about how to do that. Aboms video shows how to do it very well. Personally, I could use the quill (with DRO) on my toy mill as the press. Now, I have no intention of...- Finngineering
- Post #42
- Forum: Deckel, Maho, Aciera, Abene Mills
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Resurrection of a lobotomised Maho 600T
Time for an update again. I haven't quite made up my mind about the Y-axis ball screw bearings yet, but I think I will leave it as it is. The Maho spare part number is 27.069340 with description "L20 DF 030 T manufacturer-name-which-PM-doesn't-like". In this catalogue: Bearing catalogue I found...- Finngineering
- Post #39
- Forum: Deckel, Maho, Aciera, Abene Mills
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Resurrection of a lobotomised Maho 600T
One reason I opted to reuse the old angular contact bearings was that I was not sure of the exact type of bearing to use. I recall from the past that at least SKF have different variants of the angular contact bearings (I'm most familiar with SKF). It's clear to me that the bearings should be...- Finngineering
- Post #37
- Forum: Deckel, Maho, Aciera, Abene Mills
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Resurrection of a lobotomised Maho 600T
The term interpolation is maybe not all that clear or even correct. But it does hint at the function it performs. I also thought about this before putting that term on the board, but did not come up with anything better. Regarding the bearings, you are probably right ballen that it would have...- Finngineering
- Post #35
- Forum: Deckel, Maho, Aciera, Abene Mills
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Resurrection of a lobotomised Maho 600T
If you want the one sentence explanation, it's in the last paragraph of the post... I start by explaining how the linear scale works as a build up for the explanation of the interpolation. I'll leave out the index/reference mark, because it is not important for this discussion. I will also...- Finngineering
- Post #32
- Forum: Deckel, Maho, Aciera, Abene Mills
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Resurrection of a lobotomised Maho 600T
After some more travelling, I am now back home and on vacation. So hopefully there will be some more progress. I mentioned in passing that I will make my own "EXE" converters or interpolators for the Heidenhain linear scales. Last week I soldered the components to the board and tested it out...- Finngineering
- Post #30
- Forum: Deckel, Maho, Aciera, Abene Mills
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Resurrection of a lobotomised Maho 600T
I have been travelling over two months since the last post, so progress have been slow. In any case, I started cleaning the parts and put the saddle back on the machine. The parts are cleaning up nicely. I used Mirka Mirlon product with (I guess) a grit equivalent of 1000 paper, and only light...- Finngineering
- Post #29
- Forum: Deckel, Maho, Aciera, Abene Mills
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Resurrection of a lobotomised Maho 600T
Delaying powering off the servos can lead to a shorter braking distance. But that requires that the servos support it, handle it fast enough, and handles it safely. It's difficult to be confident about at least the last part with the Leadshine ELP drives I have. So yeah, maybe it's best to just...- Finngineering
- Post #28
- Forum: Deckel, Maho, Aciera, Abene Mills
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Resurrection of a lobotomised Maho 600T
While there is really not much left of the original E-stop chain, I do plan to recreate a similar one. The only thing I'm not sure of at the moment is if I want to remove the power to the servos directly, or with a small delay. With the delay, they might brake for a bit (the documentation is not...- Finngineering
- Post #26
- Forum: Deckel, Maho, Aciera, Abene Mills
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Resurrection of a lobotomised Maho 600T
Yes, I would also be inclined to think it should be assembled dry. What I did not write was that when I disassembled it, there were a significant amount of oil on all the surfaces. I believe this was because of the disintegrated ball screw seals. I fear that if I had assembled it dry, oil might...- Finngineering
- Post #23
- Forum: Deckel, Maho, Aciera, Abene Mills