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Messages - JHChoppers

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21
Got the window seal parts installed, just need to RTF them to keep the coolant in.  Marty, new seal would be beter… but I like the bling bling on each window.

Also, cut some cooling fans housing and a vent port for the electronics enclosure.  It came with a heat exchanger, but I really want air flow in through the enclosure. 

22
I did get some time on the CNC.  Mainly just doing small things instead of working on what needs to get done (ie Spindle Integration), so I got the windows put back in.  I had polished them earlier and wanted to get them installed before they got messed up laying around the shop.  The old window seals are hard and should be replaced, but once I started I just wanted to get it done.  For some reason this was much harder than the BP412 project.  After several hours of pain… the windows are installed but seals will not fully seal.  I made sure the gap is at the bottom and made these little seal covers.  The covers are 8 inches long and will allow me to fill in the gaps with black RTV gasket sealer.  Hopefully have a picture of them installed soon.

(Pete:  Glad your digging into the Cincinnati too)

JH
.

23
Cool looking panel. Where did you get the buttons?

Dan

The buttons are standard arcade buttons.  You can get these on the cheap from eBay.   They come with 12VDC LEDs and all kinds of colors.

JH

24
Looks great hood

25
The pneumatics are 100 VAC.  I used a toriod transformer to step down the voltage to 100 VAC and solid state relays to interface the parallel port 5 VDC to 100 VAC controls.

Below are the some pictures of the electronics used.

Thanks
JH

26
The controls are 90 or 100VAC, I used a step down transformer to drop the voltage down.  I'll check when I can....  I need to take some pictures of the inside electronics for you.

Thanks
JH

28
The Z Axis brake is hard wired to the eStop and Charge Pump circuit.  When the system is in Ready State the brake is disabled and the Servos are enabled.  If any of the servos fail at anytime, they will pull the eStop input line, Mach will stop and enter eStop State, thus the brake will be enabled.

These are independent systems working together.  The time that the servos need to hold the Z Axis is so fast, the Z will never move during the transition from eStop to Ready.

Hope this helps,
JH


29
ROCK ON !!  Thanks

JH

30
General Mach Discussion / Homing Speed? Can I change this within Mach?
« on: October 29, 2012, 05:06:32 PM »
I would like to dynamically change the homing speed as defined in this table?  Is there a variable for this?

Goal:  Home at a fast rate ( not real fast ), back off of home, then home at a slow rate.

Thanks
JH

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