I agree. However, the specs for "current" inductive switches on Farnell / RS quote a figure of 1Khz max........... and with a spindle speed of 2500 x 30 teeth on the gear gives a freq of 75 khz! I think the switch is a N/O or N/C type according to similar ones again in Farnell catalogue. Further Mac...

OK, Now I have the power supply working :) Seems also that the GSM PSU has the X and Z stepper drivers mounted on the frame as well. These use SAA1027 bipolar drivers with MJ10012 10A darlingtons on the outputs. I think these will be very slow given the switching time of the darlingtons ( avg 5us )....

Hi,

The thing is, I already have at least 4 off 3 Amp stepper drivers sitting on the shelf, and I dont want to buy yet more if they are capable of driving these motors.

Keith

Well, I finally got all the muck cleaned off the machine. Some questions though : The Steppers are Sigma Instruments 21-3450........ Now I know the 34 and 50 means NEMA 34 size and 5" length, but the 21 ?? Does this mean 2.1A per phase ? Cant find the spec of this motor at all on the web, or an equi...

excellent thanks very much. This will save some time hunting through the wiring

Rgds
Keith

This machine is identical to mine, except I dont have the CNC control pod on the right. I also need the info on the machine, and requested some help approx a month ago. I dont think there is any relevelant info on the site ( no criticism inteneded ), and Denford have said they dont have the resource...

Hi, The lathe has arrived today. Labelled as a "Synchro 280 VS Micromaster CNC" Serial number CNC 80225. DOM Dec 1981 It appears to have steppers on X and Y axis. The electrical controls / power supply in the base was made by GSM Electrical Controls in Huddersfield. Contactors and steppers are run f...

Hi, The lathe has not been shipped yet, but my contact has had a good walk around it ( no more pics though I am afraid ). It seems that the cnc "control" panel has been removed from the lathe and lost. The control wires that feed back into the lathe cabinet are just dangling.................apparent...

Some pictures..... https://picasaweb.google.co.uk/richmondrd100/Denford280VSCNC/photo#5186480612980556610 https://picasaweb.google.co.uk/richmondrd100/Denford280VSCNC/photo#5186480668815131474 https://picasaweb.google.co.uk/richmondrd100/Denford280VSCNC/photo#5186480690289967970 These are the only o...

Hi, I decided to buy the lathe, it was peanuts and seems to cry out for a new lease of life. I have purchased signt unseen ( just via photos alone ). Does anyone have a circuit diagram for this lathe pls ? I am led to beleive there are two type of controller, one is a Northeast controls, and the oth...

Hi, I have been offered a 280 VS cnc at what seems good money. However, I need to know the type of CNC control system that this lathe uses. I have seen pics and it appears that servo motors are intact and connected to the carriage and cross slide, so I am assuming that control by something like MACH...