I have bought a MacAllister angle grinder. But I can not seem to adjust the guard, any ideas??

Did you check bearings and check power cord for burned or loose connection?

Difficult to say without the machine in front of me. Normally you get this response if no beans fall into the grinder. Are your beans oily, sticking together and not falling in?
Normally freshly roasted beans esp dark roasts are a bit oily. If so then you can change roasts, brands or mix with another type.
You might try to adjust your grind per the manual. (turn knob inside the bin while the grinder is grinding) see #8 page 12.
If the beans are falling in and grinding and you still get this msg I would say you have a grinder problem.
http://capresso.125west.com/e8_manual.pdf

Before starting, find the parts diagram for the Incanto Deluxe (google search: "incanto deluxe" "parts diagram").

To remove the finger guard, first remove the silicon plug (part number 90 in parts diagram) in the center of the grind adjustment knob by poking an unbent paperclip with a small hook along the silicon plug's edge, twisting 90 degrees and pulling the plug out. Next unscrew the phillips head screw (part number 15) way down in the center of the adjustment knob and remove the knob. Then remove the phillips head screw (part number 120) holding the finger guard to the bean hopper.

I'm not sure how to work on the grinder, but from here at least you should be able to get to it. I suspect that simply removing the finger guard may make things a lot better.

haven't heard of a different guard for the cutting disc you want to use. Most people remove the guard when using them

This sounds like the grinder is not strong enough to grind properly. Try adjust the grind to a bit coarser, if this makes no difference then the bearings inside the grinder may gone. Try only fill a small amount of beans in the container and see if it works. It may be that when there is too much of a load on it it will not spin the blades.

Hello, W/D here.

It's always a wiser choice to leave the guard on to help keep particles from being slung at you.
In addition to the guard, you should also wear eye protection. I have extensive experience in industrial work, and I cannot emphasize strongly enough how important this is. Where I worked, working with a wire wheel required that the guard be in place and that the operator wear safety glasses and a face shield. An eye injury is one of the most serious accidents that can be easily avoided.
Best regards, and work safely, --W/D--

This is considered a throwaway tool when any internal parts break or wear out, including the brushes. It's usually cheaper to buy a new one as opposed to repairing one. If it's still within the warranty period, B&D will replace it or prorate the value depending on how long you've had it. The only replacement parts available for this grinder are the side handle, blade guard, the inner and outer flanges and spanner wrench.

there are 3 problems you might face: 1. mechanical - disc shield (or protector) is too small for bigger disc. You can remove the shield (I do not recommend!!!) or buy bigger one (as I've did). 2. RPMs - on each disc you can find maximal speed of ourter part of the disc. It depends on disc diameter and RPMs. In case yo go from 115 to 125 at 11 000 RPM, it should be still OK. But I would not go further. Check how RPMs drops with increasing disc diameter. 3. motor overload. To handle bigger discs motor should produce higher torque. But if you are not pressing on the grinder and you frequently check temperature of grinder, it should work. I have Metabo WE14-125 - 1400W motor 125 mm disc: 1. I've bought new shield from WE14-150 - it fits perfectly 2. My grinder has adjustable RPMs, when I'm using 150 mm disc I'm not going over level 3 (out of 6) to keep RPM in safe range for the disc. 3. Metabo makes also WE14-150 which is almost same as mine, but produces more torque (3,5Nm vs 3,3Nm). But the dofference is very small so I'm not worried. Juraj