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Well I hope I might be "usefull". Having done many large patterns for sand casting outside the scope of my CNC I cut them in waffers with each waffer having a dowel hole to align to the next waffer,...

Thanks Steve, the majority of the dividing heads and rotary tables are either 40-1 or 90 -1. These ratios will not work with the Gecko G251 1/10th microstepping drivers. Please check the ratio's...

Don't know if still an issue but Steve might chime in here. I found the Gecko 251 was not suitable for this setup due to the fact that it is 1/10th micro stepping and can't be altered. The software...

Does it rattle with the draw bar removed? ie just the bare spindle running with no tooling.

Is that you Ernie?

What temperature did you cast at? Try and keep it below 750 degree C. To hot and you will get a lot of hydrogen precipitation, when machining you will get a poor finish. Try and cast as cool as...

OK, silly question. Does it make the rattle sound with the draw bar is in place. I had a loud rattle noise in my head at higher speeds. Turned out it was the draw bar being out of balance. I put...

Thanks Steve,
The latest Hex Code (2.12) is post 128 for anyone else looking for it.

Cam

Thanks for the replies guy's. What you have described makes perfect sense. I agree with the display being incorrect but the actual angled movement is spot on. In the mean time I've ordered a 36...

G’Day All,
I have been running my rotary indexer on my Rotary Table (ratio 90-1) for the last 18 months with no problem. Needed some more power so upped the driver capacity and added on a...

Hi, will you be exporting out of Indonesia and if so will postage to Australia be cheaper. Was keen on purchasing your products in the past but postage cost was much more than the cost of the items

Do you have any photo's of your lathe, tooling setup etc. What program are you using to create the machining code?
Nice job on the hubs.

Cam

Ok, I'll see if I can help out. I use insert tools but looking at them the one on the far left (#1) is a parting or grooving tool. The next 2 (#2 & #3) are left hand and right hand finish turning...

No, it was on the large pulley. Check out -
BptParts.com: Bridgeport Machine & CNC Machine Replacement Parts
You will see the timing pulley and the retaining rings that screw onto the face of the...

I had the same issue with my Varriable Speed Head. In my case there were two causes. The first one was the draw bar was machined with only a small amount of clearance on the bore in the head. This...

Thanks for the reply's, I guess if Mach wont allow this type of turning cycle I could cheat and use the turning Wizard to create the code which has increments and cut and paste that into my own...

I have my lathe CNC retrofit completed and running on Mach3. I can write a basic step in step out code and the machine performs well. I would like to do a basic turning program that repeats and...

Have you actually tried casting with the oil bond sand?
What grade of aluminum are you using to cast with? A grade with a
high silicon content will flow easily and fill thin voids quite well.
As...

G'Day Joe,
I'll be up from Geelong for the Expo on Sunday. A group of us from Geelong have got 3 tables booked for show and tell. I'll have patterns and core boxes I've CNC'd for a...

Thanks Steve,
Yep, the box is plastic and I think your spot on with the field coming off me and grounding out through the keypad. I'll try the foil on the back of the keypad...

G'Day Firestorm,
Yep, almost the same package as I got, mounts, shims fasteners etc. As I mentioned I manufactured my own mounts to suit my application. The mounts you get...

Hello,
I purchased my 3 axis DRO for my Bridgeport from JJ at -

SINPO 3- axis digital readout (complete DRO kit) | eBay

Great service, communication and delivery through DHL. ...

Hello Steve,
Finally finished and running. Using a 32V 2.5 Amp Power Supply and works a treat. I do however have to be careful with the key pad. I'm running inverters on all my...

G'day Steve,
Received my half stepper driver today. Hooked it up and everything working perfectly. Very happy! I've printed off a few keypad overlays, they are the one side...

G'day Steve,
Received my half stepper driver today. Hooked it up and everything working perfectly. Very happy! I've printed off a few keypad overlays, they are the one side...

Thanks for the input and help felle's, Payday next week so I'll buy one of these -

Cnc 3.5A 2 phase hybrid stepper motor driver controller | eBay

Should do the job nicely. My input power...

G'Day Khalid, Yep mine works fine in division mode, I ran with 130 teeth as a dry run and it worked fine. However in degrees mode it ran up until around 220 degrees and it took off and continued...

Steve thanks for the info, Unfortunately I can't change the stepping resolution on the Gecko G250 so I'll purchase a stepper of e-bay that I can adjust to half stepping. I'll let you know how I go....

Thanks for the reply Steve, I have a 90-1 worm with a 200 step motor set at 1/10 stepping mode so the programed stepping ratio is 450.

Cam

Steve,
I have completed your fantastic digital rotary table indexer. I have run all tests and all parameters work beautifully, however I have one annoying anomaly. When running in degree...