Retrofitting a 1986 Maho MH400E

Originally the internal of the cabinet, beside the cooling unit and the different arrangement of the relay board, was exactly the same with yours.
This is the first thought, but the indramat in this arrangement may have trouble with the hot air from the vfd.

Hi Mark,

the EXE-story seems to be neverending

John,
as you have the cooling unit in the cabinet door the location of the components (VFD, PC) should not make a big difference as it constantly circulates the air. Your second attempt looks really nice and well organized.

Hi Hanno, how is your retrofit progressing?

It doesn't really bother me that the current Y Axis EXE has only 5µm resolution. I am such a beginner at milling that this is not limiting. I am mostly pleased to have the motion stable and predictable.

This is the nose protector for the Boley 4LV, for use with collets. I made a few back plates for the Boley, and this was the test peice for the 40x3.5x55° nose thread. It rotated in the chuck before reaching full depth, so threadmilling on the MAHO was used to finish it.




Mark

Hi Mark
Glad you survived the journey to that land way down under . How are things there? weather, politics, bathroom signage etc. invitations for old style Maori dinner parties? :laugh:
Since using the two 602EXE have you noticed any noise change in the servo motors at machine idle? My thinking is the differential signals for scale input are a good thing . Glad that it is looking as if the LS scales are not the problem !
Be interested in your thoughts of what is next for the Maho conversion .


Hanmon
What is the latest on your Maho conversion?

Normally it rains every time we go to NZ. My family considered paying us to not come in summer, after we ruined one. This time I went alone and had blue sky sunny warm days. This confirms that my wife is a rain godess.

I connected the 602/1-F EXE and sent it to home. Opened a HALScope, and looked at the signal while manually turning Y, and could see that the signal looked good by with much lower resolution. Change the scale in the INI from -1000 to -200 and it has worked. I do notice that there is still a rythmic oscillation in Y between adjacent 0.005mm positions when stationary. I was never that happy with the tuning of Y ( in hindsight that was probably tied up with the drift). I'll retune that axis no it is stable and report back.

Next steps:
- I still have to get my panel encoders working. They are wired, and the buttons work, but the encoder signals aren't.
- Sergey is working on a revision to the gearbox comp to give the comp full control of the spindle and address that isue of going to neutral each stop, and thus not completing gear changes from a running spindle.
- I need to make the pendant. Touching off with the touch screen is a PITA.
- The dolley design needs completing and it manufactured, so I can finally try and fit this through the skinny door into the machine shop.
- I picked up a mist coolant system at some point, and would like to integrate that next time the covers come off.
- When fitting the new bellows I notice one oil line had been crushed on a previous cover installation, so it need replacing.

Since I practice analysis paralysis, I challenged myself to whip up a knife sharpening jig out of junk that was laying around, in one quick session without stopping. Made this in about 15 minutes.




Considering the tie wraps and double sided tape holding it together it works pretty well. Now it gets improved. I have already made stone holder with four grits of stone. Next I want to design and mill a decent knife holder.
Mark

Hi,

my Maho works. The pendant is still missing but it does not have a high priority. I'm going to start building a fourth axis in 1-2 weeks and, of course, will post some pictures then.