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Messages - Steveharris

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Hi,   Encoders are Hewlett Packard HEDS-5500 2 channel optical, pulse width error, count frequency 100kHz (MAX)

Toothed belt drive to leadscrews (5mm pitch) 3 : 1 reduction.

I have had a word with the UK smooth stepper agent and he has them in stock so I think I will go with one of those.

Looking around for a suitable break out board

I have to source a new laptop as mine is not powerful enough but ones with an ethernet socket seem to be in short supply.
I will use Mach 4 as suggested.
Thanks again.
Regards.  Steve Harris

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Hi, Thanks for the prompt reply.
The Gecko drives are G340 DC servo drives.  The information is in the support section of the Gecko website.
Not sure what else you need to know. ??
Regards. Steve Harris

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General Mach Discussion / Denford Triac still waiting (patiently) to run
« on: January 05, 2021, 02:15:50 PM »
Hi everyone.  My name is Steve Harris and I’ve just joined this forum although I have been looking at it for some time.
If you check out my introduction, on page 277 of “New people!! Come in here and introduce yourself, then you will better understand my predicament.
I have a Denford Triac miller which I have been converting over the years. It’s been stood now for 10 years without me doing anything to it.
 Have fitted various bits of hardware and the specification so far is as follows:
½ hp (0.37 kW) motor on the spindle as supplied with the machine. X and y motors are 100 watt brushed DC and a 120 watt brushed DC on z axis.  Toothed belts fitted to each, 3:1 ratio.  Panel contains 3 Geko G340 servo drives.  Each axis motor is fitted with a Hewlett Packard HEDS-5500 optical encoder. A DC power supply is fitted to supply the axis motors at 18 volts via the Geko drivers. There is also a 5 volt power supply unit, which was free so I put it in, but not used (yet!!)
I have a Mitsubishi VFD for the spindle drive.  I also have a “Digispeed-XL ver 5.1” from Homann Designs (Australia) for control of spindle speed via the VFD. The machine has its original limit ad home switches (see below).
Some of the wiring is complete; I have used screened cable where appropriate, and am OK with completing this. All the limit switches are the original micro type switches.  The homing switches are 2 wire proximity type. They are Balluf units and very compact. And there was one used as a spindle speed sensor but this has escaped!
My problems now are what to use for connection to the computer in the way of a breakout board (and do I need anything else in between?). 
I believe the circuitry for these Balluf proximities was all on the original control board, long since gone as it was badly burned up when I had it. Is there anything I can use to interface these or would it be easier to fit another type that would communicate with a new breakout board. I would also need a spindle speed sensor.
I see that some of the latest breakout boards have all manner of control and inputs so could anyone advise me please as to what I should do to get it going.
Thanks in advance for any information.

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Thanks very much.  I will dig out all the specification data I have and post as soon as possible.

Thanks again.

Steve Harris

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Hi,  My name is Steve Harris and I live near Worcester in England. I am retired now and have been interested in CNC for some years.  I have a Denford Triac mill which I started rebuilding (electronics were U/S) a while ago. An acquaintance helped me with initial set up but by the time I got to the electronics stage I had lost touch with him so now I am stuck with a machine doing nothing.  My problem is that I am OK on the mechanical and electrical side of things but electronics to me are a mystery !!
I will probably be posting a fair few questions in my efforts to, at last, get this thing going.
The triac came from a local college, where my wife worked, and came in a job lot of machines and stuff.  The Denford miller cost me £5-60, and I also have the Orac lathe at the same price !!
Sorry to rant on but perhaps you can see my dilemma as I've spent a fair few pounds on hardware and would love to get this up and running.
Regards.  Steve Harris

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