New Hermes NHI810 Retrofit

[762x51]

I’m converting my NHI810 to get rid of the original electronics and replacing them with a Gecko G540 controller. I’m also replacing the original stepper motors and power supply. I’ll post some photos of the conversion as it progresses.

Here are the parts I’m using and links to suppliers:

Gecko G540 controller: Gecko G540
E-Stop switch: Emergency Stop Switch
Spindle Motor relay: 48V Relay Kit

48 VDC Power Supply KL-350-48 48V/7.3A 110V/230V: Switching Power Supply, Keling Technology Inc, USA

Limit Switches # 7193K2 : McMaster-Carr

Stepper Motors STP-MTR-23055: STP-MTR-23055 Products

Stepper Motor cable: STP-EXT-020: STP-EXT-020 Products
PC Software: MACH3: ArtSoft USA - Home of Mach3 and LazyCam

Cost to date:
Gecko G540: $265.00
E-Stop switch: $19.50
Spindle Motor Relay: $8.75
48 VDC Power supply: $49.95
Limit Switches: 4 @ $6.10 = $24.40
Stepper Motors: 3 @ $30.00 = $90.00
Stepper Motor cable 3 @ $14.00 = $42.00
MACH3 Software license: $175.00
Misc. shipping, terminal strips, etc. = $50.00
Conversion cost to date: $724.60

Alternate is the Q1 conversion for $2,850 + software: http://www.q1engravers.com/pdf/Nhi810_Retrofit_2010.pdf

I’ve attached a copy of the wiring diagram and I’ll post some photos of the conversion later today. It’s not finished but you’ll be able to see what I’ve done so far.

Any suggestions would be appreciated.

Regards,Orin

[underthetire]

I'm watching this post! Our hermes needs the same thing.

[762x51]

Here are some photos of the retrofit to date. As you can see, this is still very much a work in progress.

Limits for the X axis are installed and the original +Z limit is being reused. You may notice I have drilled a hole in the top of the Z axis enclosure.
I needed to get to the 2 set screws in the Z axis cam and drilling a access hole made getting to them much, much easier.
Still need to come up with a good way to mount the Y limits.

I think I'm going to abandon replacing the original power supply because the new steppers have plenty of torque using the existing 24 VDC supply. New motors are much quieter than the old ones and the axis movement smoother.

Wiring is a rat's nest now and I'll be adding another terminal strip to help clean it up.

[762x51]

I've gotten a little more accomplished - Mounted the Y+ and Y- limits and the Y+ Home switches. They were mounted on the right Y axis linear slide cover and there needs to be another mounting screw added at the rear to prevent the cover from moving.

I'll be mounting the X- Home switch in a similar fashion - gang mounted with the X- limit switch.

[762x51]

Retrofit is finished - Now it's time to learn MACH3.......

Here are a couple of photos of the final wiring and a PDF file of the schematic.

[cokita86]

I see that you know a lot of the new hermes nhi 810, i just bought one in ebay.. it came bu when i turn it on only appears a green screen.. nothing more, please help me

[762x51]

Originally Posted by cokita86 I see that you know a lot of the new hermes nhi 810, i just bought one in ebay.. it came bu when i turn it on only appears a green screen.. nothing more, please help me

I cannot help you as I never used the original controller because it wasn't working when I bought the 810.