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Hello, I've been trying to diagnose a noisy Z axis for quite some time. I initially thought it was a bad ball screw but cant find anything that doesn't feel smooth mechanically in the motion. when...

I replaced this encoder in February of this year due to an intermittent Z CH Missing error. This is a 1994 VF3, the encoder was replaced with a new unit from Haas. I finished the job I was working...

Some truly bizarre things going on with this control I think, but I have it working again (sort of).
Here is the process I went through (much abbreviated, swearing omitted).

the RS232 cable on...

I am getting this error only when the machine is first started up. I keep rehoming until it completes with no error then I run rapid at 50% for a few minutes. After this I can run at 100% for hours...

That tester would have saved me hours, going to pick one up for sure. Will check the machine grounding but the PC is a laptop.

I re-read that post and I realize it sounds like shortening the cable fixed the problem. To clarify I transferred a program earlier in the day with the long cable before the port stopped working. I...

Sinumeric? A machine of the same vintage experiencing the same problem likely could have the same issue. I was hoping to hear from the OP and get some closure to the thread.

cable was long but I made a shorter one for testing. I tested the cable and adapter by transferring programs to another PC. Windows 10 running Cimco. Just transferred a program to the machine...

My problem is exactly as OP described, machine is the same model & year, and the same steps have been done to diagnose. Most likely source of the problem is the communication board at this point but...

I know this thread is old, but what was the solution? I have the exact machine and just lost communication.

We have a machine here at work that I just did some digging on. It has almost identical castings, it is a milltronics RH20 RH20 | Milltronics USA - Let's Invent. It looks like it is capable of...

The parts I am running right now are pretty simple and short cycle. About 8 minutes per part with 5 toolchanges and there are very few gains left to be had in the toolpath. I just recently got an...

Good info. That looks like a similar sized machine. I cant tell if the Z-axis is counterbalanced on the 4400, mine is.
Here is a pic of my machine before the retrofit.
381902

Think this would do it?...

encoders are Renco 1000ppr. So direct drive would only give .0002" resolution, correct?

You are correct, I was mistaken. 90v is on the AC side, which rectified becomes 130vdc. So my actual voltage is 130vdc

200 ipm seems dreadfully slow when in production. I would like to see if I can get this machine in the 400 ipm rapid area. The current setup is Mach4 -- Hicon Integra controller -- Viper 200 servo...

Try hitting the escape key and/or the stop button

Good points. Chances are if I need 480 in the future I wont find a transformer for what I paid for this one.
Is 15hp overkill for a 7.5hp motor? Can I get away with a 10hp?

I am looking at replacing my vfd with a hitachi unit for the vector capabilities. My setup is rotary converter into a 45kva transformer stepping it up to 480. Question is do I stick with 480 or go...

Larry,
I am already pushing the limits of my AC motor :). I should be maxed out at 3600, but I have been running it at 5000 for some time now. Seems to be fairly well balanced. I actually had it...

Maybe I am better off keeping my current setup and changing my VFD to a vector drive like this:...

So my spindle right now is driven by a 7.5hp AC induction motor & VFD. I have it limited to 5k rpm, which I am satisfied with. I would like to convert to a servo driven spindle, but I have not...

I am trying to replace my threaded drawbar with a gripper type for easier automation down the road. My spindle is machined for an NMTB 40 holder, which gives me some room at the top to work, but not...

I have a machine that has an Actek, Inc control board that I need to modify the program on. The board is a COP 1040. Actek appears to have gone out of business recently, and I cant find any...

Well I am using the second method, and it works just as planned. The only downfall here is that the relay coil stays in the circuit. Probably isn't an issue, it should just act like part of the...

I have a servo power supply that is simply 120vac rectified with a large capacitor (not sure of the value at the moment). I cannot switch this on directly without tripping breakers, burning...

Well, I hate to be forced down this road but it seems the best choice. I have been entertaining the idea for a long time, but I thought I would do it when it was convenient. Now I have two fried...

I think the speed was probably around rapid speed, but i dont think it was much faster. Yes it is one bus supply to all drives. I tested all of the output mosfets on one of the drives and they...

I have an anilam 3300mk with glentek servo amplifiers. DC brushed system with tach.
I attempted to use it last night and two of my amps have no lights on. Tried swapping drives and it follows the...