Thread: Hewing hall millgrav
Oh by the way he has changed all of his tronics out for up to date stuff and is running Mach3If the nagging gets really bad......Get a bigger shed:naughty:
Hi New Member ( name and address withheld ), i have gutted my machine as i was dismayed how BASIC the controller was, i felt that someone had found my old BBC basic computer and given it back to me to use again!!!
I have so far rebuilt the z axis to use a Chinese water cooled spindle motor and inverter and therefore done away with the belt driven spindle and the very noisy motor mounted top central of the mill grav i have also stripped out all of the original electronics and i am currently building a PC mother board with a smooth stepper to give two IO ports and a serial port to control the inverter, i am intending to use one port to work with a MPG and the other port as limits and over travel switches all of this is to be run under windoz and Mach3 much to 2e0poz's dismay and his attempts for me to run Linux... i am stead fast with this windoz rubbish
So far everything seems to be going to plan ( if i had one ) and i am now wiring and configuring the MB and all of the IO's.
it is possible that i may be able to obtain some software for your apex controller..... but do not hold your breath, the chap i bought my machine from has another with the apex controller and my be willing to run off a copy, but he is an excellent engineer not a software wizz...!!
I think your design building on a large surface table is an excellent idea, but impossible to move is it compleatly cancelled or will it fly again??
Many Thanks for your reply, I am not fully sure if your machine had the Apex controller which you have removed or had the original electronics in the machine cabinet. I notice Newing Hall show Apex controllers on there current engraving machines but I understand them to be a later model.
Re the "Table" engraver, I will probably keep the table and sell off the other components when I can get the MillGrav running.
One idea I incorporated was to have the surface table long edge skirts machined parallel with a register so they could take ball slides. As a cost saving experiment I machined a flat bottomed 90deg vee groove centrally in a 80 x 20 flat this held a 30 x 30 square rail with the corner removed, held with recessed socked head screws at close centres. Essentially creating a bolt on adjustable vee guide. By shimming the upper and lower faces of the vee groove the rails could be adjusted parallel to the tables surface and to each other. Thats the theory but never put to the task. The gantry "saddle" was to be a machined vee with a 2mm PTFE "gasket" type gib strip. pre loaded again by shimming.
Hi New Member ( name withheld ), i have spoke to my friend and he has asked what software you want>> also what controller you have, he describes it by the number of buttons along the top of the front panel. perhaps you can take a photo of it this would help greatly.
Hi New Member
I am sorry to be the bearer of bad news but my friend john has been unable to find any of the software that came with his machine, he informas me that he never used it anyhow as he uses a really weird program called casemate this outputs a hpgl type of language and machines in layers and colours...way too weird for me and this prog is well locked up with dongles
So perhaps you will go a similar rout to me......Wire cutters...................
I have this weekend i have got the MPG ( manual pulse generator ) working and calibrated along with the spindle inverter working under Mach3, i will soon be fitting processing power back into the box on Millgrav..
If you want any tips on how to do this i will be very happy to help
Hi there, Its nice to see a millgrav in good hands there. I worked at Newing-Hall as a fitter for 20 years and in that time I built or worked on just about every millgrav that we made. Its 10 years since the company went under but I think Pantograph Services of Leeds took over the handling of Newing-Halls affairs. I like the new spindle arrangment you have there, the large aluminium pulley on the original motor could sometimes cause trouble with vibration. The millgrav was one of my favourite machines because it did away with the old pantograph which could sometimes be difficult to set up and it was so easy to knock it out of square meaning a service call out to reset it. There were a couple of variations of the millgrav in that one had a solid aluminium plate holding the Y carriage and that had the slots for the ball blocks permanently machined at 90 deg to one another. The other had two aluminium plates on a spigot that allowed the two to swivel. We then had to manually set the plates at 90 deg to each other and dowel them with tapered pins. These machines were sold all over the world, The Jet Propulsion Lab USA (NASA) had one, Australia, South Africa, UK. Anyway, you will have to post some video footage of the machine working when its all up and running.