Search:

if ur problem is backlash u will have a misplace/miss-joint at start point of the circle, try a circle with start point on left/right and then rotate it 90 degree(start point at top/bottom) this will...

maybe axis speed or acceleration are set too muchor noise problem

mach can't do that perfect, if u do that work as pocket engraving u'll encounter these:
- job time very long
- engrave lines at two ends of each horizontal line will be deeper (acceleration limits)...

Problem solved!:cheers:
after alot search and contact with seller i found the reason. i just decreased "X start speed" ( in "sweep parameters" of User settings in Rdcam6) from 20mm/s to 15mm/s and...

hi, i've recently changed my laser control system from mach3 to DSP RDL320(bec of my job needs)
no problem when cutting, but when do engraving (scan mode) result is tilted in X direction (each time...

100w tube need a bigger trigger voltage also current
u can't get entire power so

completly wrong, u need to adjust power with IN( with manual pot or pwm ) and decide on using low active or high active also ground P(pump )
do a search on wiring a laser psu, can find alot!!

i'm using reci 80w in a diy machine for more than 4000hrs during more than 1 year,i've used that in range 15-60% of full power and think not bad ! it has now just 10-20% of power loss

todays i am working on big problem with my machine!
it's WORKING TABLE is so weak and isn't stable and damp enogh
it's deformation (at center) with a 10kgs load is about 0.2mm :(
so decided to...

the key features of EG are it's rigidity,damping, stability
i've found it can take much $ for a big machine (1 kg costs about 2-3 $ for me ;) )
so what about combination it with a steel truss...

after being sure of installing ballscrew it was time to install the motor.
it is a 3.8v 4 amp unipolar step motor
for do that i used 4 steel bars as supporting legs and a mounting plate.
first i...

hi , slow progress but it is going on!
today i completed the x axis by installing ballscrew, I installed it as "one end fixed other end supported)

for this i used welding and epoxy binding. at...

i havn't changed driver, bec it's made by myself :rolleyes:
it is a 3axis controller based on l297 and darlington tip122
i made it some years ago for a small cnc router, and here i just used X and...

here is a video of this machine:
YouTube - Dot matrix printer to vinyl cutting.wmv

thanks of replys so reply:
1- how do you activate the solenoid? Do you lift it up from cut to cut?
i found a trick for do it, in working with mach3 software, you should know when using step motors...

Are you sure a dot matrix works ?
yes of course, i'm making money with this machine:D (by making signs for shops)
i'll upload a video of it's work soon
and interestedi with ur project

sory for my late answers, bec i'm very busy with my big project
and here info:
- about solenoid, it's came from an old dead copier machine some thing like below pic and about heatsink, because it...

down move is easily made by a solenoid and up move by a spring( these are done in mach3 as z axes control ) and blade holde is just ablade two miniator bearing and a steel tube as case with a...

i think we'll see Chinese dreams in future Too:eek:
what've u done with ur machine? installed motors and making controler?
if u want i can show using l297 for unipolar steppers (but not a choper...

what is ur goal of cnc? just hobby or making a job 4 urself
if it's usefull to u , i may help u with diys

i think at first u must be sure of LPT output (hardware,wire and DRIVER)
for testing it use a small led with a resistor on the selected pins and run mach, if all are ok it will say to you, then u...

i think 50c isn't so much
it may be overdrived with extra current (don't use chopper?)
usually steppers are used on higher current . i've been running my router motors with double current and they...

i thinks must put my glasses to read!;)

very blurry pic, u must say how many wires came out of them it will be usefull to determin their type, with my experiments i think they are ordinayl 1.8...

i think this will be usefull:
http://www.cnczone.com/forums/printing_scanners_vinyl_cutting_plotters/118819-dot_matrix_printer_vinyl_cutting.html

no reply
so
here is more info and pics
i made this with on old epson dot matrix printer.
in commercial cutters the pressure of blade determine depth of cut, but here i used a...

diy 3 axis stepper controller based on l297
out puts 4amp 12 volts

i've plenty of time & alittle $
so i made main body (with x rails) and gantry and then by installing a grinder i could do :
- making y rails position with accuracy copied of x rails
- nice cutting...

one my biggest problem for my projects has been money! especially for machining this big one
at first i wanted to use metal epoxy for creating accurate surface for rails ( it means using set screws...

yes, here must be more info so:
i have seen many peoples makes diy cncs from steel, aluminum, wood and mdf and.. not for metal cutting, so i decided to build almost allpurpose machine.
the first...

i've used epoxy but not for complete building , just filled tubes of structure for rigidity and reinforcements u can see at...