KiCAD schematic Anilam Crusader M Conversion

I've been messing around w/ KiCAD and did a schematic for my Anilam Crusader M to a Mesa 5i25 & 7i77 conversion. In the github repository there's a Auto_Mesa.lib that includes a component for a 7i77. Since KiCAD is meant for circuit layout, I didn't know how to include the jumpers so left those off. But, the pins are there and it's in a multi-part format, which worked out kinda nice.

github.com/floppydisk525/AnilamToLinuxCNC

FloppyDisk,

Thank you for putting together those schematics. I started my conversion on the Crusader II and it encouraged me to cut the cord on the old control. So far I was able to enable the drives by jumpering pins 13 and 14 on P7 on PCB 803. Unfortunately this bypasses the safety circuit limit chain that kills power to the drives.I haven't fully wrapped my head around the PCB 801 relay board. I will probably do what you did and run the limits into the 7i77 and have a servo enable go to pin 2. Can you tell me a bit more about the 801 connections/modifications? Specifically why to remove the 24v connection on P5?

OT-CNC,

Probably the most useful page of the pdf w/ the link below is page 3, which has my notes of what I decided to do w/ PCB801.

drive.google.com/file/d/0ByHpuoFMRAsDeDh...bDQ/view?usp=sharing

Trying to explain it, I removed 2 of the 3 relays (ice cub style relays) on the top of the PCB801 board. The one that I left, K3 is used to trigger K2, which is a Solid State Relay (SSR) located UNDERNEATH the PCB801 and this SSR is what allows 120Vac power to goto the transformer (if I recall correctly) and ultimately power the West Amp servo amplifiers. They do this on P6, which I would have left attached.

The KEY here is that on P5 I disconnected the COM (pin 1) and +24Vdc (pin 2) and then connected the mesa to pins P3 1 and 2. This is the ENABLE for the servo axes and I used a standard OUTPUT from the 7i77.

I also left the auto/manual switch (p4) connected. That allows you to turn the switch to manual and NOT power the servo's. I never use it, though. Maybe once...

Also, I rewired P7 to the machines RESET button and Pilot light that is powered by the output from the mesa. Hmmm, I noticed that my pilot wasn't always working, I bet that output from the mesa (or something else) is an issue, need to look into that.

The main thing here is that the mesa has sourcing OUTPUTS while the PCB801 was designed for Sinking outputs. That's why they have +24VDC hooked up on P5 pin 2. Eliminate that and run the relays 'backwards' so to speak...

Holler with questions, think i have an idea of what and why I did it, but didn't document it that well.

Mark

Mark,

Thank you for the detailed explanation and link!

You're welcome and I hope it helps. My notes are a little bit unfinished so it takes a minute to go back through and decipher them. I do recall spending quite a bit of time trying to figure out how I should use PCB801. I'm sure there are other ways and probably could have eliminated it all-together. But, seemed useful and works well.

Good luck
Mark

I followed your schematics and notes on sheet 3/5 and it all works! Thanks for making it easy for me!!
A couple of questions. Did you add an additional fly back diode to protect the 7i77? I assume the diode on K3 is sufficient?
If I wanted to use K4 for any reason, would I remove the 220 ohm resistor?
My machine being an older crusader, does not seem to have any line conditioners built in! I see your schematics shows 2. One 5A and a 20A. Anything I need to know when sourcing those? I have a couple rated for different voltages. Can one rated for 250v ac 6A work the same on 120v?