Retrofitting a 1986 Maho MH400E

Marc,
I am sorry but job and children keep from doing anything to the machines at the moment, so I am waiting for the Christmas break. What do you want the cables for? Heidenhain used 3x2x0,14mm² + 2x0,5 mm² for the "normal" sinusoidal scales. You can use Helukabel Toplex 22800 or Lapp Kabel ÖLFLEX SERVO 720 CY 0036168. Unfortunatley they are not available in shorter lengths. www.voelkner.de/products/604051/LappKabe...au-0036168-50-m.html If you are interested, I could check for shorter delivery times, order a coil and sell you what you need.
Christian

Excellent thread with a wealth of information. Thanks for updating!

I've been a little too busy with other things lately, so the MAHO hasn't had much attention. My friend dropped off the lasered parts he kindly arranged last weekend,

so today I spent the day working on the new control panel.

I used HCl to removed the mill scale. First I've done that, and it works really well. Way easier than trying to grind it off.


Whoever came up with the idea of self fixturing laser weldment was a genius. I took quite a while to model the sheets in CAD and get them all interlocking properly. When I first put them together with too many clamps, I couldn't get them to fit, but the secret was fewer clamps, and they just snapped together.


After I tacked it together...


... it was time to check that the monitor mounting was correct.


I am not much of a welder, so there is going to be a fair bit of grinding to get those edges looking nice for painting.


Mark

Merry Xmas everyone.

John, sorry it has taken me till today to follow your advice and make a new PNCConf config and then paste in the files you sent me. Like that the Classic ladder files for the gearbox are editable.


Did you make progress on calling the ladder functions when an S word is called? I have started looking at reassigning M (S) codes.

What is the trick for pulling MAHO ball screw pulleys? I read on a german forum that there is a trick, but it didn't say what that is.

I confirmed that the Y axis is moving ~130mm on a 100 mm command.

The new control panel housing is progressing. A lot of grinding, and some more welding to fix slag inclusions, more grinding and I couldnt resist mocking it up again.


It undercoated now, to stop it rusting, then I'll bog it to hide the divets from grinding and other eyesores.



To mount the buttons and associated switches, some fiddly bits were also lasered.

Mark

Merry Christmas to all. Hi Marc, glad that the configuration works.
On the pulley assembly the component between the pulley and the shaft it expands with the pressure of the flange and act like a safety clutch. When there is no pressure from the flange (with the six screws) it should come off by hand easily. In my case the flange was not tight enough and the clutch was rubbing on the shaft and the tiny mark from friction on the shaft was the reason the pulley was difficult to remove. I haven’t worked on the configuration after post it.
Nice work on the control panel.
John

Thanks John, at present, there is currently nothing implemented to call the gearchange.clp is there?

I was looking at remapping S, as the Linuxcnc G code remapping widget uses Python, which I have a little bit of experience with. If I understand correctly, then the setspeed_prolog and setspeed_epilog could be used to call and wrap your ladder logic.

Here is my block diagram for that plan. Any comments and suggestions are appreciated.


I started bogging the defects on the housing, but didn't use enough hardener, and it's cold in the basement, so I put it by the furnance in the hope that is goes hard.

Also printing the first of the control panel buttons on the 3D printer.
Mark